1
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Zhao B, Donahue NM, Zhang K, Mao L, Shrivastava M, Ma PL, Shen J, Wang S, Sun J, Gordon H, Tang S, Fast J, Wang M, Gao Y, Yan C, Singh B, Li Z, Huang L, Lou S, Lin G, Wang H, Jiang J, Ding A, Nie W, Qi X, Chi X, Wang L. Global variability in atmospheric new particle formation mechanisms. Nature 2024; 631:98-105. [PMID: 38867037 PMCID: PMC11222162 DOI: 10.1038/s41586-024-07547-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 05/09/2024] [Indexed: 06/14/2024]
Abstract
A key challenge in aerosol pollution studies and climate change assessment is to understand how atmospheric aerosol particles are initially formed1,2. Although new particle formation (NPF) mechanisms have been described at specific sites3-6, in most regions, such mechanisms remain uncertain to a large extent because of the limited ability of atmospheric models to simulate critical NPF processes1,7. Here we synthesize molecular-level experiments to develop comprehensive representations of 11 NPF mechanisms and the complex chemical transformation of precursor gases in a fully coupled global climate model. Combined simulations and observations show that the dominant NPF mechanisms are distinct worldwide and vary with region and altitude. Previously neglected or underrepresented mechanisms involving organics, amines, iodine oxoacids and HNO3 probably dominate NPF in most regions with high concentrations of aerosols or large aerosol radiative forcing; such regions include oceanic and human-polluted continental boundary layers, as well as the upper troposphere over rainforests and Asian monsoon regions. These underrepresented mechanisms also play notable roles in other areas, such as the upper troposphere of the Pacific and Atlantic oceans. Accordingly, NPF accounts for different fractions (10-80%) of the nuclei on which cloud forms at 0.5% supersaturation over various regions in the lower troposphere. The comprehensive simulation of global NPF mechanisms can help improve estimation and source attribution of the climate effects of aerosols.
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Affiliation(s)
- Bin Zhao
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China.
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing, China.
- Pacific Northwest National Laboratory, Richland, WA, USA.
| | - Neil M Donahue
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Engineering and Public Policy, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Kai Zhang
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Lizhuo Mao
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
| | | | - Po-Lun Ma
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Jiewen Shen
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
| | - Shuxiao Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing, China
| | - Jian Sun
- National Center for Atmospheric Research, Boulder, CO, USA
| | - Hamish Gordon
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, USA
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Shuaiqi Tang
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Jerome Fast
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Mingyi Wang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Yang Gao
- Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
| | - Chao Yan
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | | | - Zeqi Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
| | - Lyuyin Huang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
| | - Sijia Lou
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - Guangxing Lin
- Pacific Northwest National Laboratory, Richland, WA, USA
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Hailong Wang
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Jingkun Jiang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing, China
| | - Aijun Ding
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - Wei Nie
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - Ximeng Qi
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - Xuguang Chi
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - Lin Wang
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, China
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2
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Rörup B, He XC, Shen J, Baalbaki R, Dada L, Sipilä M, Kirkby J, Kulmala M, Amorim A, Baccarini A, Bell DM, Caudillo-Plath L, Duplissy J, Finkenzeller H, Kürten A, Lamkaddam H, Lee CP, Makhmutov V, Manninen HE, Marie G, Marten R, Mentler B, Onnela A, Philippov M, Scholz CW, Simon M, Stolzenburg D, Tham YJ, Tomé A, Wagner AC, Wang M, Wang D, Wang Y, Weber SK, Zauner-Wieczorek M, Baltensperger U, Curtius J, Donahue NM, El Haddad I, Flagan RC, Hansel A, Möhler O, Petäjä T, Volkamer R, Worsnop D, Lehtipalo K. Temperature, humidity, and ionisation effect of iodine oxoacid nucleation. ENVIRONMENTAL SCIENCE: ATMOSPHERES 2024; 4:531-546. [PMID: 38764888 PMCID: PMC11097302 DOI: 10.1039/d4ea00013g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 03/21/2024] [Indexed: 05/21/2024]
Abstract
Iodine oxoacids are recognised for their significant contribution to the formation of new particles in marine and polar atmospheres. Nevertheless, to incorporate the iodine oxoacid nucleation mechanism into global simulations, it is essential to comprehend how this mechanism varies under various atmospheric conditions. In this study, we combined measurements from the CLOUD (Cosmic Leaving OUtdoor Droplets) chamber at CERN and simulations with a kinetic model to investigate the impact of temperature, ionisation, and humidity on iodine oxoacid nucleation. Our findings reveal that ion-induced particle formation rates remain largely unaffected by changes in temperature. However, neutral particle formation rates experience a significant increase when the temperature drops from +10 °C to -10 °C. Running the kinetic model with varying ionisation rates demonstrates that the particle formation rate only increases with a higher ionisation rate when the iodic acid concentration exceeds 1.5 × 107 cm-3, a concentration rarely reached in pristine marine atmospheres. Consequently, our simulations suggest that, despite higher ionisation rates, the charged cluster nucleation pathway of iodic acid is unlikely to be enhanced in the upper troposphere by higher ionisation rates. Instead, the neutral nucleation channel is likely to be the dominant channel in that region. Notably, the iodine oxoacid nucleation mechanism remains unaffected by changes in relative humidity from 2% to 80%. However, under unrealistically dry conditions (below 0.008% RH at +10 °C), iodine oxides (I2O4 and I2O5) significantly enhance formation rates. Therefore, we conclude that iodine oxoacid nucleation is the dominant nucleation mechanism for iodine nucleation in the marine and polar boundary layer atmosphere.
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Affiliation(s)
- Birte Rörup
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
| | - Xu-Cheng He
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Yusuf Hamied Department of Chemistry, University of Cambridge Cambridge UK
| | - Jiali Shen
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Helsinki Institute of Physics, University of Helsinki Helsinki Finland
| | - Rima Baalbaki
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
| | - Lubna Dada
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Mikko Sipilä
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
| | - Jasper Kirkby
- CERN, European Organisation for Nuclear Research Geneva Switzerland
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Markku Kulmala
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University Nanjing China
| | | | - Andrea Baccarini
- Laboratory of Atmospheric Processes and their Impacts, École polytechnique fédérale de Lausanne Lausanne Switzerland
| | - David M Bell
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Lucía Caudillo-Plath
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Jonathan Duplissy
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Helsinki Institute of Physics, University of Helsinki Helsinki Finland
| | - Henning Finkenzeller
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Department of Chemistry & CIRES, University of Colorado Boulder Boulder USA
| | - Andreas Kürten
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Houssni Lamkaddam
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Chuan Ping Lee
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Vladimir Makhmutov
- Lebedev Physical Institute, Russian Academy of Sciences Moscow Russia
- Moscow Institute of Physics and Technology, National Research University Moscow Russia
| | - Hanna E Manninen
- CERN, European Organisation for Nuclear Research Geneva Switzerland
| | - Guillaume Marie
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Ruby Marten
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Bernhard Mentler
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Yusuf Hamied Department of Chemistry, University of Cambridge Cambridge UK
| | - Antti Onnela
- CERN, European Organisation for Nuclear Research Geneva Switzerland
| | - Maxim Philippov
- Lebedev Physical Institute, Russian Academy of Sciences Moscow Russia
| | | | - Mario Simon
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Dominik Stolzenburg
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Institute for Materials Chemistry, TU Wien Vienna Austria
- Faculty of Physics, University of Vienna Vienna Austria
| | - Yee Jun Tham
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- School of Marine Sciences, Sun Yat-sen University Zhuhai China
| | - António Tomé
- IDL-UBI, Universidade da Beira Interior Covilhã Portugal
| | - Andrea C Wagner
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
- Aerosol Physics, Tampere University Tampere Finland
| | - Mingyi Wang
- Department of the Geophysical Sciences, University of Chicago Chicago USA
| | - Dongyu Wang
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Yonghong Wang
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing China
| | - Stefan K Weber
- CERN, European Organisation for Nuclear Research Geneva Switzerland
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Marcel Zauner-Wieczorek
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Urs Baltensperger
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Joachim Curtius
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main Frankfurt am Main Germany
| | - Neil M Donahue
- Center for Atmospheric Particle Studies, Carnegie Mellon University Pittsburgh USA
| | - Imad El Haddad
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute Villigen Switzerland
| | - Richard C Flagan
- Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena USA
| | - Armin Hansel
- Institute for Ion and Applied Physics, University of Innsbruck Innsbruck Austria
| | - Ottmar Möhler
- Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology Karlsruhe Germany
| | - Tuukka Petäjä
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
| | - Rainer Volkamer
- Department of Chemistry & CIRES, University of Colorado Boulder Boulder USA
| | - Douglas Worsnop
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
| | - Katrianne Lehtipalo
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki Helsinki Finland
- Finnish Meteorological Institute Helsinki Finland
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3
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Evan S, Brioude J, Rosenlof KH, Gao RS, Portmann RW, Zhu Y, Volkamer R, Lee CF, Metzger JM, Lamy K, Walter P, Alvarez SL, Flynn JH, Asher E, Todt M, Davis SM, Thornberry T, Vömel H, Wienhold FG, Stauffer RM, Millán L, Santee ML, Froidevaux L, Read WG. Rapid ozone depletion after humidification of the stratosphere by the Hunga Tonga Eruption. Science 2023; 382:eadg2551. [PMID: 37856589 DOI: 10.1126/science.adg2551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 09/05/2023] [Indexed: 10/21/2023]
Abstract
The eruption of the Hunga Tonga-Hunga Ha'apai volcano on 15 January 2022 offered a good opportunity to explore the early impacts of tropical volcanic eruptions on stratospheric composition. Balloon-borne observations near Réunion Island revealed the unprecedented amount of water vapor injected by the volcano. The enhanced stratospheric humidity, radiative cooling, and expanded aerosol surface area in the volcanic plume created the ideal conditions for swift ozone depletion of 5% in the tropical stratosphere in just 1 week. The decrease in hydrogen chloride by 0.4 parts per million by volume (ppbv) and the increase in chlorine monoxide by 0.4 ppbv provided compelling evidence for chlorine activation within the volcanic plume. This study enhances our understanding of the effect of this unusual volcanic eruption on stratospheric chemistry and provides insights into possible chemistry changes that may occur in a changing climate.
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Affiliation(s)
- Stephanie Evan
- Laboratoire de l'Atmosphère et des Cyclones (LACy), UMR8105, CNRS, Université de La Réunion, Météo-France, Saint-Denis, France
| | - Jerome Brioude
- Laboratoire de l'Atmosphère et des Cyclones (LACy), UMR8105, CNRS, Université de La Réunion, Météo-France, Saint-Denis, France
| | | | - Ru-Shan Gao
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
| | | | - Yunqian Zhu
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - Rainer Volkamer
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - Christopher F Lee
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - Jean-Marc Metzger
- Observatoire des Sciences de l'Univers de la Réunion, UAR 3365 (CNRS, Université de la Réunion, Météo-France), Saint-Denis, France
| | - Kevin Lamy
- Laboratoire de l'Atmosphère et des Cyclones (LACy), UMR8105, CNRS, Université de La Réunion, Météo-France, Saint-Denis, France
| | | | | | | | - Elizabeth Asher
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
| | - Michael Todt
- Finnish Meteorological Institute, Helsinki, Finland
| | - Sean M Davis
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
| | | | - Holger Vömel
- National Center for Atmospheric Research, Boulder, CO, USA
| | - Frank G Wienhold
- Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
| | - Ryan M Stauffer
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Luis Millán
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - Michelle L Santee
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - Lucien Froidevaux
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - William G Read
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
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4
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Guo Y, Li K, Perrier S, An T, Donaldson DJ, George C. Spontaneous Iodide Activation at the Air-Water Interface of Aqueous Droplets. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:15580-15587. [PMID: 37804225 PMCID: PMC10586319 DOI: 10.1021/acs.est.3c05777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/09/2023]
Abstract
We present experimental evidence that atomic and molecular iodine, I and I2, are produced spontaneously in the dark at the air-water interface of iodide-containing droplets without any added catalysts, oxidants, or irradiation. Specifically, we observe I3- formation within droplets, and I2 emission into the gas phase from NaI-containing droplets over a range of droplet sizes. The formation of both products is enhanced in the presence of electron scavengers, either in the gas phase or in solution, and it clearly follows a Langmuir-Hinshelwood mechanism, suggesting an interfacial process. These observations are consistent with iodide oxidation at the interface, possibly initiated by the strong intrinsic electric field present there, followed by well-known solution-phase reactions of the iodine atom. This interfacial chemistry could be important in many contexts, including atmospheric aerosols.
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Affiliation(s)
- Yunlong Guo
- Guangdong
Key Laboratory of Environmental Catalysis and Health Risk Control,
Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure
and Health, School of Environmental Science and Engineering, Institute
of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
- Université
Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
| | - Kangwei Li
- Université
Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
- Department
of Environmental Sciences, University of
Basel, Basel 4056, Switzerland
| | - Sebastien Perrier
- Université
Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
| | - Taicheng An
- Guangdong
Key Laboratory of Environmental Catalysis and Health Risk Control,
Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure
and Health, School of Environmental Science and Engineering, Institute
of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - D. James Donaldson
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Christian George
- Université
Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
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5
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Saiz-Lopez A, Fernandez RP, Li Q, Cuevas CA, Fu X, Kinnison DE, Tilmes S, Mahajan AS, Gómez Martín JC, Iglesias-Suarez F, Hossaini R, Plane JMC, Myhre G, Lamarque JF. Natural short-lived halogens exert an indirect cooling effect on climate. Nature 2023; 618:967-973. [PMID: 37380694 PMCID: PMC10307623 DOI: 10.1038/s41586-023-06119-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 04/21/2023] [Indexed: 06/30/2023]
Abstract
Observational evidence shows the ubiquitous presence of ocean-emitted short-lived halogens in the global atmosphere1-3. Natural emissions of these chemical compounds have been anthropogenically amplified since pre-industrial times4-6, while, in addition, anthropogenic short-lived halocarbons are currently being emitted to the atmosphere7,8. Despite their widespread distribution in the atmosphere, the combined impact of these species on Earth's radiative balance remains unknown. Here we show that short-lived halogens exert a substantial indirect cooling effect at present (-0.13 ± 0.03 watts per square metre) that arises from halogen-mediated radiative perturbations of ozone (-0.24 ± 0.02 watts per square metre), compensated by those from methane (+0.09 ± 0.01 watts per square metre), aerosols (+0.03 ± 0.01 watts per square metre) and stratospheric water vapour (+0.011 ± 0.001 watts per square metre). Importantly, this substantial cooling effect has increased since 1750 by -0.05 ± 0.03 watts per square metre (61 per cent), driven by the anthropogenic amplification of natural halogen emissions, and is projected to change further (18-31 per cent by 2100) depending on climate warming projections and socioeconomic development. We conclude that the indirect radiative effect due to short-lived halogens should now be incorporated into climate models to provide a more realistic natural baseline of Earth's climate system.
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Affiliation(s)
- Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain.
| | - Rafael P Fernandez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain
- Institute for Interdisciplinary Science (ICB), National Research Council (CONICET), FCEN-UNCuyo, Mendoza, Argentina
| | - Qinyi Li
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Carlos A Cuevas
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain
| | - Xiao Fu
- Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Douglas E Kinnison
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - Simone Tilmes
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - Anoop S Mahajan
- Centre for Climate Change Research, Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | | | - Fernando Iglesias-Suarez
- Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
| | - Ryan Hossaini
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | | | - Gunnar Myhre
- CICERO Center for International Climate Research, Oslo, Norway
| | - Jean-François Lamarque
- Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
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6
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Zhang Q, Zhu L, Zhou Z, Wang Z, Tian Y, Liu Y. Dissociative photoionization studies of ethyl iodide using synchrotron radiation photoionization mass spectrometry and photoelectron imaging. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2023.140427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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7
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Mondal K, Rajakumar B. Kinetics of IO radicals with C1, C2 aliphatic alcohols in tropospherically relevant conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:22590-22605. [PMID: 36303003 DOI: 10.1007/s11356-022-23494-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
Kinetics of the reaction of IO radicals with methanol (MeOH) and ethanol (EtOH) were experimentally studied in the gas phase using pulsed laser photolysis-cavity ring-down spectroscopy (PLP-CRDS). IO radicals were produced in situ at the reaction zone by photolysing a mixture of precursors (CH3I + O3 + N2) at 248 nm and thereby electronically excited at 445.04 nm. The rate coefficients for the reactions of (IO + MeOH) and (IO + EtOH) were measured at a total pressure of 60 Torr/N2 in the range of 258-360 K. At room temperature, the experimental rate coefficients of the title reactions were measured to be [Formula: see text] and [Formula: see text]. Dependencies of the kinetics with photolysis laser fluence and experimental pressures were verified. Effects of pressure over the kinetic behaviour of the studied systems were observed to be insignificant within the statistical uncertainties when studied in the range of ~ 30-150 Torr/N2, whereas a minor and linear fluence dependency was observed within the studied limit. From the measured kinetic parameters, the atmospheric lifetimes of MeOH and EtOH were calculated in the tropospherically relevant conditions regarding their reactions with important atmospheric oxidants like Cl atom, OH and IO radicals. To complement experimental results, kinetics and thermochemistry for the title reactions were investigated theoretically via canonical variational transition state (CVT) theory in combination with small curvature tunnelling (SCT) corrections with a dual-level Interpolated Single Point Energy (ISPE) approach at the CCSD(T)/def2-QZVPP//M06-2X/def2-TZVPP level of theory/basis set in the temperatures between 200 and 400 K. Good degree of agreement was encountered between experimentally measured and theoretically calculated rate coefficients. This article also discusses the thermochemical parameters and kinetic branching ratios (BRs) of all the pathways involved in the title reactions.
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Affiliation(s)
- Koushik Mondal
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Balla Rajakumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India.
- Centre for Atmospheric and Climate Sciences, Indian Institute of Technology Madras, Chennai, 600036, India.
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8
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The gas-phase formation mechanism of iodic acid as an atmospheric aerosol source. Nat Chem 2023; 15:129-135. [PMID: 36376388 PMCID: PMC9836935 DOI: 10.1038/s41557-022-01067-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022]
Abstract
Iodine is a reactive trace element in atmospheric chemistry that destroys ozone and nucleates particles. Iodine emissions have tripled since 1950 and are projected to keep increasing with rising O3 surface concentrations. Although iodic acid (HIO3) is widespread and forms particles more efficiently than sulfuric acid, its gas-phase formation mechanism remains unresolved. Here, in CLOUD atmospheric simulation chamber experiments that generate iodine radicals at atmospherically relevant rates, we show that iodooxy hypoiodite, IOIO, is efficiently converted into HIO3 via reactions (R1) IOIO + O3 → IOIO4 and (R2) IOIO4 + H2O → HIO3 + HOI + (1)O2. The laboratory-derived reaction rate coefficients are corroborated by theory and shown to explain field observations of daytime HIO3 in the remote lower free troposphere. The mechanism provides a missing link between iodine sources and particle formation. Because particulate iodate is readily reduced, recycling iodine back into the gas phase, our results suggest a catalytic role of iodine in aerosol formation.
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9
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Ammann M, Artiglia L. Solvation, Surface Propensity, and Chemical Reactions of Solutes at Atmospheric Liquid-Vapor Interfaces. Acc Chem Res 2022; 55:3641-3651. [PMID: 36472357 PMCID: PMC9774673 DOI: 10.1021/acs.accounts.2c00604] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
surface is covered by oceans, a large number of liquid aerosol particles fill the air, and clouds hold a tiny but critical fraction of Earth's water in the air to influence our climate and hydrology, enabling the lives of humans and ecosystems. The surfaces of these liquids provide the interface for the transfer of gases, for nucleation processes, and for catalyzing important chemical reactions. Coupling a range of spectroscopic tools to liquid microjets has become an important approach to better understanding dynamics, structure, and chemistry at liquid interfaces. Liquid microjets offer stability in vacuum and ambient pressure environments, thus also allowing X-ray photoelectron spectroscopy (XPS) with manageable efforts in terms of differential pumping. Liquid microjets are operated at speeds sufficient to allow for a locally equilibrated surface in terms of water dynamics and solute surface partitioning. XPS is based on the emission of core-level electrons, the binding energy of which is selective for the element and its chemical environment. Inelastic scattering of electrons establishes the probing depth of XPS in the nanometer range and thus its surface sensitivity.In this Account, we focus on aqueous solutions relevant to the surface of oceans, aqueous aerosols, or cloudwater. We are interested in understanding solvation and acid dissociation at the interface, interfacial aspects of reactions with gas-phase reactants, and the interplay of ions with organic molecules at the interface. The strategy is to obtain a link between the molecular-level picture and macroscopic properties and reactivity in the atmospheric context.We show consistency between surface tension and XPS for a range of surface-active organic species as an important proof for interrogating an equilibrated liquid surface. Measurements with organic acids and amines offer important insight into the question of apparent acidity or basicity at the interface. Liquid microjet XPS has settled the debate of the surface enhancement of halide ions, shown using the example of bromide and its oxidation products. Despite the absence of a strong enhancement for the bromide ion, its rate of oxidation by ozone is surface catalyzed through the stabilization of the bromide ozonide intermediate at the interface. In another reaction system, the one between Fe2+ and H2O2, a similar intermediate in the form of highly valent iron species could not be detected by XPS under the experimental conditions employed, shedding light on the abundance of this intermediate in the environment but also on the constraints within which surface species can be detected. Emphasizing the importance of electrostatic effects, we show how a cationic surfactant attracts charged bromide anions to the interface, accompanied by enhanced oxidation rates by ozone, overriding the role of surfactants as a barrier for the access of gas-phase reactants. The reactivity and structure at interfaces thus result from a subtle balance between hygroscopic and hydrophobic interactions, electrostatic effects, and the structural properties of both liquids and solutes.
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10
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Tang B, Li Z. Mechanisms of Reactions between HOI and HY (Y = Cl, Br, I) on a Water Nanodroplet Surface. J Phys Chem A 2022; 126:8028-8036. [PMID: 36260343 DOI: 10.1021/acs.jpca.2c05414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iodine chemistry has a broad range of implications for atmospheric processes including new particle formation. Hypoiodous acid (HOI) is a major iodine reservoir species. Its heterogeneous recycling in marine aerosols influences the lifetime of ozone in the troposphere. One important step of such recycling is the reaction between HOI and HY (Y = Cl, Br, I). In this article, we employ ab initio molecular dynamics (AIMD) and quantum chemistry to investigate these reactions at the surface of atmospheric aerosols. Di-halogen (XY) can be formed in a picosecond time scale, with the formation of a loop structure connected by hydrogen and halogen bonds. The photolysis of XY at the surface of an aerosol is faster than in the gas phase. In addition to the formation of di-halogen, a new pathway to forming a [H2O···I···OH2]+ complex by the direct or indirect proton transition is identified. Results presented in this study deepen our understanding of the faster iodine-heterogeneous recycling at the surface of aerosols.
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Affiliation(s)
- Bo Tang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui230026, China
| | - Zhenyu Li
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui230026, China
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11
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Gómez Martín JC, Lewis TR, James AD, Saiz-Lopez A, Plane JMC. Insights into the Chemistry of Iodine New Particle Formation: The Role of Iodine Oxides and the Source of Iodic Acid. J Am Chem Soc 2022; 144:9240-9253. [PMID: 35604404 PMCID: PMC9164234 DOI: 10.1021/jacs.1c12957] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
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Iodine chemistry
is an important driver of new particle formation
in the marine and polar boundary layers. There are, however, conflicting
views about how iodine gas-to-particle conversion proceeds. Laboratory
studies indicate that the photooxidation of iodine produces iodine
oxides (IxOy), which are well-known particle precursors. By contrast, nitrate
anion chemical ionization mass spectrometry (CIMS) observations in
field and environmental chamber studies have been interpreted as evidence
of a dominant role of iodic acid (HIO3) in iodine-driven
particle formation. Here, we report flow tube laboratory experiments
that solve these discrepancies by showing that both IxOy and HIO3 are involved in atmospheric new particle formation. I2Oy molecules (y = 2,
3, and 4) react with nitrate core ions to generate mass spectra similar
to those obtained by CIMS, including the iodate anion. Iodine pentoxide
(I2O5) produced by photolysis of higher-order
IxOy is hydrolyzed,
likely by the water dimer, to yield HIO3, which also contributes
to the iodate anion signal. We estimate that ∼50% of the iodate
anion signals observed by nitrate CIMS under atmospheric water vapor
concentrations originate from I2Oy. Under such conditions, iodine-containing clusters and particles
are formed by aggregation of I2Oy and HIO3, while under dry laboratory conditions,
particle formation is driven exclusively by I2Oy. An updated mechanism for iodine gas-to-particle
conversion is provided. Furthermore, we propose that a key iodine
reservoir species such as iodine nitrate, which we observe as a product
of the reaction between iodine oxides and the nitrate anion, can also
be detected by CIMS in the atmosphere.
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Affiliation(s)
| | - Thomas R Lewis
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Serrano 119, Madrid 28006, Spain.,School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | | | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Serrano 119, Madrid 28006, Spain
| | - John M C Plane
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
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12
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Marzouk S, Ajili Y, Ben El Hadj Rhouma M, Ben Said R, Hochlaf M. Theoretical treatment of IO-X (X = N 2, CO, CO 2, H 2O) complexes. Phys Chem Chem Phys 2022; 24:7203-7213. [PMID: 35266935 DOI: 10.1039/d1cp05536d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iodine monoxide (IO) is an important component of the biogeochemical cycle of iodine. For instance, it is present in the troposphere, where it plays a crucial role in the physical chemical processes involving iodine containing compounds. Here, we present a theoretical study on a series of atmospherically relevant complexes of IO with N2, CO, CO2 and H2O, where their structural and spectroscopic properties and their interaction energies are computed. Calculations are carried out by means of ab initio post Hartree-Fock (RCCSD(T) and RMP2) methods and density functional theory DFT (PBE0 and M05-2X) based approaches with and without the inclusion of dispersion correction. After comparison to RCCSD(T), we highlight the good performance of M05-2X(+D3) DFT in describing the bonding between IO and X (X = N2, CO, CO2, H2O). Moreover, we found that the IO-X (X = N2, CO, CO2, H2O) complexes are formed by non-covalent interactions between the two monomers. In sum, we characterized two types of complexes: I-bonded and O-bonded, where the former is more stable. The atmospheric implications of the present findings are also discussed such as in the formation of the iodine oxide particles (IOPs).
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Affiliation(s)
- S Marzouk
- Laboratoire de Recherche d'Etude des Milieux Ionisés et Réactifs (EMIR), Institut Préparatoire aux Etudes d'Ingénieurs de Monastir, Université de Monastir, Tunisia.,Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France.
| | - Y Ajili
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications - LSAMA, Université de Tunis-El Manar, Tunis, Tunisia
| | - M Ben El Hadj Rhouma
- Laboratoire de Recherche d'Etude des Milieux Ionisés et Réactifs (EMIR), Institut Préparatoire aux Etudes d'Ingénieurs de Monastir, Université de Monastir, Tunisia
| | - R Ben Said
- Department of Chemistry, College of Science and Arts, Qassim University, ArRass, Saudi Arabia
| | - M Hochlaf
- Université Gustave Eiffel, COSYS/LISIS, 5 Bd Descartes 77454, Champs sur Marne, France.
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13
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Nascimento VL, Souza BCOQ, Lopes G, Guilherme LRG. On the Role of Iodine in Plants: A Commentary on Benefits of This Element. FRONTIERS IN PLANT SCIENCE 2022; 13:836835. [PMID: 35392505 PMCID: PMC8980854 DOI: 10.3389/fpls.2022.836835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 02/11/2022] [Indexed: 05/31/2023]
Affiliation(s)
| | | | - Guilherme Lopes
- Soil Science Department, Universidade Federal de Lavras, Lavras, Brazil
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14
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Roberts FC, Lehman JH. Infrared frequency comb spectroscopy of CH 2I 2: Influence of hot bands and pressure broadening on the ν 1 and ν 6 fundamental transitions. J Chem Phys 2022; 156:114301. [DOI: 10.1063/5.0081836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Direct frequency comb spectroscopy was utilized to measure the vibrational absorption spectrum of diiodomethane, CH2I2, from 2960 to 3125 cm−1. The data were obtained using a CH2I2 concentration of (6.8 ± 1.3) × 1015 molecule cm−3 and a total pressure of 10–300 mbar with either nitrogen or argon as the bath gas. The rovibrational spectra of two fundamental transitions, ν6 and ν1, were recorded and analyzed. We suggest that a significant contribution to the observed congested spectra is due to the population in excited vibrational states of the low energy ν4 I–C–I bend, resulting in transitions 6104nn and 1104nn, where the integer n is the initial vibrational level v = 1–5. PGOPHER was used to fit the experimental spectrum, allowing for rotational constants and other spectral information to be reported. In addition, it was found that the peak widths for the observed transitions were limited by pressure broadening, resulting in a pressure broadening parameter of (0.143 ± 0.006) cm−1 atm−1 by N2 and (0.116 ± 0.006) cm−1 atm−1 by Ar. Further implications for other dihaloalkane infrared spectra are discussed.
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Affiliation(s)
| | - Julia H. Lehman
- School of Chemistry, University of Leeds, Leeds, United Kingdom
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15
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Gómez Martín JC, Saiz‐Lopez A, Cuevas CA, Baker AR, Fernández RP. On the Speciation of Iodine in Marine Aerosol. JOURNAL OF GEOPHYSICAL RESEARCH. ATMOSPHERES : JGR 2022; 127:e2021JD036081. [PMID: 35865333 PMCID: PMC9286534 DOI: 10.1029/2021jd036081] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/25/2022] [Accepted: 02/05/2022] [Indexed: 05/20/2023]
Abstract
We have compiled and analyzed a comprehensive data set of field observations of iodine speciation in marine aerosol. The soluble iodine content of fine aerosol (PM1) is dominated by soluble organic iodine (SOI; ∼50%) and iodide (∼30%), while the coarse fraction is dominated by iodate (∼50%), with nonnegligible amounts of iodide (∼20%). The SOI fraction shows an equatorial maximum and minima coinciding with the ocean "deserts," which suggests a link between soluble iodine speciation in aerosol and ocean productivity. Among the major aerosol ions, organic anions and non-sea-salt sulfate show positive correlations with SOI in PM1. Alkali cations are positively correlated to iodate and negatively correlated with SOI and iodide in coarse aerosol. These relationships suggest that under acidic conditions iodate is reduced to HOI, which reacts with organic matter to form SOI, a possible source of iodide. In less acidic sea-salt or dust-rich coarse aerosols, HOI oxidation to iodate and reaction with organic matter likely compete.
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Affiliation(s)
| | - Alfonso Saiz‐Lopez
- Department of Atmospheric Chemistry and ClimateInstitute of Physical Chemistry RocasolanoCSICMadridSpain
| | - Carlos A. Cuevas
- Department of Atmospheric Chemistry and ClimateInstitute of Physical Chemistry RocasolanoCSICMadridSpain
| | - Alex R. Baker
- Centre for Ocean and Atmospheric ScienceSchool of Environmental SciencesUniversity of East AngliaNorwichUK
| | - Rafael P. Fernández
- Institute for Interdisciplinary ScienceNational Research Council (ICB‐CONICET)FCEN‐UNCuyoMendozaArgentina
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16
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The influence of iodine on the Antarctic stratospheric ozone hole. Proc Natl Acad Sci U S A 2022; 119:2110864119. [PMID: 35131938 PMCID: PMC8851550 DOI: 10.1073/pnas.2110864119] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2021] [Indexed: 11/29/2022] Open
Abstract
The role of chlorine and bromine in Antarctic stratospheric ozone depletion is well known. However, the contribution of iodine to the ozone hole chemistry has not been assessed, mainly due to the negligible amounts of iodine previously reported to enter the stratosphere. New measurements demonstrate that the injection of iodine to the lower stratosphere is higher than previously assumed. Based on these observations, our modeling work shows that iodine chemistry can enhance spring ozone loss at the lower part of the Antarctic ozone hole, and even dominate the halogen-mediated ozone loss during summer. Iodine can also alter, by several days, the timing of the seasonal formation and closure of the ozone hole. The catalytic depletion of Antarctic stratospheric ozone is linked to anthropogenic emissions of chlorine and bromine. Despite its larger ozone-depleting efficiency, the contribution of ocean-emitted iodine to ozone hole chemistry has not been evaluated, due to the negligible iodine levels previously reported to reach the stratosphere. Based on the recently observed range (0.77 ± 0.1 parts per trillion by volume [pptv]) of stratospheric iodine injection, we use the Whole Atmosphere Community Climate Model to assess the role of iodine in the formation and recent past evolution of the Antarctic ozone hole. Our 1980–2015 simulations indicate that iodine can significantly impact the lower part of the Antarctic ozone hole, contributing, on average, 10% of the lower stratospheric ozone loss during spring (up to 4.2% of the total stratospheric column). We find that the inclusion of iodine advances the beginning and delays the closure stages of the ozone hole by 3 d to 5 d, increasing its area and mass deficit by 11% and 20%, respectively. Despite being present in much smaller amounts, and due to faster gas-phase photochemical reactivation, iodine can dominate (∼73%) the halogen-mediated lower stratospheric ozone loss during summer and early fall, when the heterogeneous reactivation of inorganic chlorine and bromine reservoirs is reduced. The stratospheric ozone destruction caused by 0.77 pptv of iodine over Antarctica is equivalent to that of 3.1 (4.6) pptv of biogenic very short-lived bromocarbons during spring (rest of sunlit period). The relative contribution of iodine to future stratospheric ozone loss is likely to increase as anthropogenic chlorine and bromine emissions decline following the Montreal Protocol.
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17
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Corella JP, Maffezzoli N, Spolaor A, Vallelonga P, Cuevas CA, Scoto F, Müller J, Vinther B, Kjær HA, Cozzi G, Edwards R, Barbante C, Saiz-Lopez A. Climate changes modulated the history of Arctic iodine during the Last Glacial Cycle. Nat Commun 2022; 13:88. [PMID: 35013214 PMCID: PMC8748508 DOI: 10.1038/s41467-021-27642-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 12/03/2021] [Indexed: 11/23/2022] Open
Abstract
Iodine has a significant impact on promoting the formation of new ultrafine aerosol particles and accelerating tropospheric ozone loss, thereby affecting radiative forcing and climate. Therefore, understanding the long-term natural evolution of iodine, and its coupling with climate variability, is key to adequately assess its effect on climate on centennial to millennial timescales. Here, using two Greenland ice cores (NEEM and RECAP), we report the Arctic iodine variability during the last 127,000 years. We find the highest and lowest iodine levels recorded during interglacial and glacial periods, respectively, modulated by ocean bioproductivity and sea ice dynamics. Our sub-decadal resolution measurements reveal that high frequency iodine emission variability occurred in pace with Dansgaard/Oeschger events, highlighting the rapid Arctic ocean-ice-atmosphere iodine exchange response to abrupt climate changes. Finally, we discuss if iodine levels during past warmer-than-present climate phases can serve as analogues of future scenarios under an expected ice-free Arctic Ocean. We argue that the combination of natural biogenic ocean iodine release (boosted by ongoing Arctic warming and sea ice retreat) and anthropogenic ozone-induced iodine emissions may lead to a near future scenario with the highest iodine levels of the last 127,000 years.
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Affiliation(s)
- Juan Pablo Corella
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Serrano 119, 28006, Madrid, Spain.
- CIEMAT, Environmental Department, Av. Complutense 40, 28040, Madrid, Spain.
| | - Niccolo Maffezzoli
- Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen, Tagensvej 16, Copenhagen N, 2200, Denmark
- Institute of Polar Sciences, CNR- ISP, Via Torino 155, 30172, Venice, Italy
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino 155, 30172, Venice, Italy
| | - Andrea Spolaor
- Institute of Polar Sciences, CNR- ISP, Via Torino 155, 30172, Venice, Italy
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino 155, 30172, Venice, Italy
| | - Paul Vallelonga
- Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen, Tagensvej 16, Copenhagen N, 2200, Denmark
| | - Carlos A Cuevas
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Serrano 119, 28006, Madrid, Spain
| | - Federico Scoto
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino 155, 30172, Venice, Italy
- Institute of Atmospheric Sciences and Climate, ISAC-CNR, S.P Lecce-Monteroni km1.2, 73100, Lecce, Italy
| | - Juliane Müller
- Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Am Alten Hafen 26, 27568, Bremerhaven, Germany
- MARUM Research Faculty, University of Bremen, Leobener Strasse 8, 28359, Bremen, Germany
| | - Bo Vinther
- Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen, Tagensvej 16, Copenhagen N, 2200, Denmark
| | - Helle A Kjær
- Physics of Ice Climate and Earth, Niels Bohr Institute, University of Copenhagen, Tagensvej 16, Copenhagen N, 2200, Denmark
| | - Giulio Cozzi
- Institute of Polar Sciences, CNR- ISP, Via Torino 155, 30172, Venice, Italy
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino 155, 30172, Venice, Italy
| | - Ross Edwards
- Physics and Astronomy, Curtin University, Kent St, Bentley, WA, 6102, Australia
- Department of Civil and Environmental Engineering, UW-Madison, Madison, WI, 53706, USA
| | - Carlo Barbante
- Institute of Polar Sciences, CNR- ISP, Via Torino 155, 30172, Venice, Italy
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino 155, 30172, Venice, Italy
| | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Serrano 119, 28006, Madrid, Spain.
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18
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Koenig TK, Volkamer R, Apel EC, Bresch JF, Cuevas CA, Dix B, Eloranta EW, Fernandez RP, Hall SR, Hornbrook RS, Pierce RB, Reeves JM, Saiz-Lopez A, Ullmann K. Ozone depletion due to dust release of iodine in the free troposphere. SCIENCE ADVANCES 2021; 7:eabj6544. [PMID: 34936464 PMCID: PMC8694599 DOI: 10.1126/sciadv.abj6544] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 11/03/2021] [Indexed: 06/03/2023]
Abstract
Iodine is an atmospheric trace element emitted from oceans that efficiently destroys ozone (O3). Low O3 in airborne dust layers is frequently observed but poorly understood. We show that dust is a source of gas-phase iodine, indicated by aircraft observations of iodine monoxide (IO) radicals inside lofted dust layers from the Atacama and Sechura Deserts that are up to a factor of 10 enhanced over background. Gas-phase iodine photochemistry, commensurate with observed IO, is needed to explain the low O3 inside these dust layers (below 15 ppbv; up to 75% depleted). The added dust iodine can explain decreases in O3 of 8% regionally and affects surface air quality. Our data suggest that iodate reduction to form volatile iodine species is a missing process in the geochemical iodine cycle and presents an unrecognized aeolian source of iodine. Atmospheric iodine has tripled since 1950 and affects ozone layer recovery and particle formation.
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Affiliation(s)
- Theodore K. Koenig
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, Boulder, CO, USA
| | - Rainer Volkamer
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, Boulder, CO, USA
| | - Eric C. Apel
- Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - James F. Bresch
- Mesoscale & Microscale Meteorology Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - Carlos A. Cuevas
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, Spanish National Research Council (CSIC), Madrid, Spain
| | - Barbara Dix
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, Boulder, CO, USA
| | - Edwin W. Eloranta
- Space Science and Engineering Center, University of Wisconsin, Madison, WI, USA
| | - Rafael P. Fernandez
- Institute for Interdisciplinary Science, National Research Council (ICB-CONICET), FCEN-UNCuyo, Mendoza, Argentina
| | - Samuel R. Hall
- Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - Rebecca S. Hornbrook
- Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - R. Bradley Pierce
- The National Environmental Satellite, Data, and Information Service (NESDIS), Madison, WI, USA
| | - J. Michael Reeves
- Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, Spanish National Research Council (CSIC), Madrid, Spain
| | - Kirk Ullmann
- Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
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19
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McKinnon BI, Marlton SJP, Ucur B, Bieske EJ, Poad BLJ, Blanksby SJ, Trevitt AJ. Actinic Wavelength Action Spectroscopy of the IO - Reaction Intermediate. J Phys Chem Lett 2021; 12:11939-11944. [PMID: 34878800 DOI: 10.1021/acs.jpclett.1c03456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Iodinate anions are important in the chemistry of the atmosphere where they are implicated in ozone depletion and particle formation. The atmospheric chemistry of iodine is a complex overlay of neutral-neutral, ion-neutral, and photochemical processes, where many of the reactions and intermediates remain poorly characterized. This study targets the visible spectroscopy and photostability of the gas-phase hypoiodite anion (IO-), the initial product of the I- + O3 reaction, by mass spectrometry equipped with resonance-enhanced photodissociation and total ion-loss action spectroscopies. It is shown that IO- undergoes photodissociation to I- + O (3P) over 637-459 nm (15700-21800 cm-1) because of excitation to the bound first singlet excited state. Electron photodetachment competes with photodissociation above the electron detachment threshold of IO- at 521 nm (19200 cm-1) with peaks corresponding to resonant autodetachment involving the singlet excited state and the ground state of neutral IO possibly mediated by a dipole-bound state.
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Affiliation(s)
- Benjamin I McKinnon
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Samuel J P Marlton
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Boris Ucur
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Evan J Bieske
- School of Chemistry, The University of Melbourne, Victoria 3010, Australia
| | - Berwyck L J Poad
- Central Analytical Research Facility, Queensland University of Technology, Brisbane 4001, Australia
- School of Chemistry and Physics, Queensland University of Technology, Brisbane 4001, Australia
| | - Stephen J Blanksby
- Central Analytical Research Facility, Queensland University of Technology, Brisbane 4001, Australia
- School of Chemistry and Physics, Queensland University of Technology, Brisbane 4001, Australia
| | - Adam J Trevitt
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
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20
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Mondal K, Kumar A, Rajakumar B. Kinetics of IO radicals with ethyl formate and ethyl acetate: a study using cavity ring-down spectroscopy and theoretical methods. Phys Chem Chem Phys 2021; 23:25974-25993. [PMID: 34783802 DOI: 10.1039/d1cp02615a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The gas-phase kinetics of the reactions of IO radicals with ethyl formate (EF) and ethyl acetate (EA) were investigated experimentally using cavity ring-down spectroscopy (CRDS). IO radicals were generated in situ in the CRD reaction zone by photolyzing a mixture of (CH3I + O3 + N2) at 248 nm and thereby probed at 445.04 nm. The rate coefficients for the reactions (IO + EF) and (IO + EA) were measured at a total pressure of 65 Torr of N2 in the temperature range of 258-358 and 260-360 K, respectively. The rate coefficients for the reactions (IO + EF) and (IO + EA) were measured experimentally at room temperature to be kExpt,298KIO+EF = (3.38 ± 0.67) × 10-14 and kExpt,298KIO+EA = (1.56 ± 0.30) × 10-13 cm3 molecule-1 s-1, respectively. The effects of pressure and photolysis laser fluence on the kinetics of test reactions were found to be negligible within the experimental uncertainties for the studied range. To complement our experimental findings, the kinetics of the title reactions were investigated theoretically using canonical variational transition state theory (CVT) with small curvature tunnelling (SCT) at the CCSD(T)//M06-2X/def2-SV(P) level of theory in temperatures between 200 and 400 K. Very good agreement was observed between the experimentally measured and theoretically calculated rate coefficients for both the reactions at 298 K. The thermochemical parameters as well as the branching ratios for the title reactions are also discussed in this study.
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Affiliation(s)
- Koushik Mondal
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, India.
| | - Avinash Kumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, India.
| | - B Rajakumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, India.
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21
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Chen S, Artiglia L, Orlando F, Edebeli J, Kong X, Yang H, Boucly A, Corral Arroyo P, Prisle N, Ammann M. Impact of Tetrabutylammonium on the Oxidation of Bromide by Ozone. ACS EARTH & SPACE CHEMISTRY 2021; 5:3008-3021. [PMID: 34825122 PMCID: PMC8607506 DOI: 10.1021/acsearthspacechem.1c00233] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 10/01/2021] [Accepted: 10/09/2021] [Indexed: 06/13/2023]
Abstract
The reaction of ozone with sea-salt derived bromide is relevant for marine boundary layer atmospheric chemistry. The oxidation of bromide by ozone is enhanced at aqueous interfaces. Ocean surface water and sea spray aerosol are enriched in organic compounds, which may also have a significant effect on this reaction at the interface. Here, we assess the surface propensity of cationic tetrabutylammonium at the aqueous liquid-vapor interface by liquid microjet X-ray photoelectron spectroscopy (XPS) and the effect of this surfactant on ozone uptake to aqueous bromide solutions. The results clearly indicate that the positively charged nitrogen group in tetrabutylammonium (TBA), along with its surface activity, leads to an enhanced interfacial concentration of both bromide and the bromide ozonide reaction intermediate. In parallel, off-line kinetic experiments for the same system demonstrate a strongly enhanced ozone loss rate in the presence of TBA, which is attributed to an enhanced surface reaction rate. We used liquid jet XPS to obtain detailed chemical composition information from the aqueous-solution-vapor interface of mixed aqueous solutions containing bromide or bromide and chloride with and without TBA surfactant. Core level spectra of Br 3d, C 1s, Cl 2p, N 1s, and O 1s were used for this comparison. A model was developed to account for the attenuation of photoelectrons by the carbon-rich layer established by the TBA surfactant. We observed that the interfacial density of bromide is increased by an order of magnitude in solutions with TBA. The salting-out of TBA in the presence of 0.55 M sodium chloride is apparent. The increased interfacial bromide density can be rationalized by the association constants for bromide and chloride to form ion-pairs with TBA. Still, the interfacial reactivity is not increasing simply proportionally with the increasing interfacial bromide concentration in response to the presence of TBA. The steady state concentration of the bromide ozonide intermediate increases by a smaller degree, and the lifetime of the intermediate is 1 order of magnitude longer in the presence of TBA. Thus, the influence of cationic surfactants on the reactivity of bromide depends on the details of the complex environment at the interface.
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Affiliation(s)
- Shuzhen Chen
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
- Institute
of Atmospheric and Climate Sciences, ETH
Zürich, 8006 Zürich, Switzerland
| | - Luca Artiglia
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Fabrizio Orlando
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Jacinta Edebeli
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
- Institute
of Atmospheric and Climate Sciences, ETH
Zürich, 8006 Zürich, Switzerland
| | - Xiangrui Kong
- Center
for Atmospheric Research, University of
Oulu, P.O. Box 4500, 90014 Oulu, Finland
| | - Huanyu Yang
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
- Institute
of Atmospheric and Climate Sciences, ETH
Zürich, 8006 Zürich, Switzerland
| | - Anthony Boucly
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Pablo Corral Arroyo
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
| | - Nønne Prisle
- Center
for Atmospheric Research, University of
Oulu, P.O. Box 4500, 90014 Oulu, Finland
| | - Markus Ammann
- Laboratory
of Environmental Chemistry, Paul Scherrer
Institute, 5232 Villigen, Switzerland
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22
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Gómez-Consarnau L, Klein NJ, Cutter LS, Sañudo-Wilhelmy SA. Growth rate-dependent synthesis of halomethanes in marine heterotrophic bacteria and its implications for the ozone layer recovery. ENVIRONMENTAL MICROBIOLOGY REPORTS 2021; 13:77-85. [PMID: 33185965 DOI: 10.1111/1758-2229.12905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 10/30/2020] [Accepted: 11/09/2020] [Indexed: 06/11/2023]
Abstract
Halomethanes (e.g., CH3 Cl, CH3 Br, CH3 I and CHBr3 ) are ozone-depleting compounds that, in contrast to the human-made chlorofluorocarbons, marine organisms synthesize naturally. Therefore, their production cannot be totally controlled by human action. However, identifying all their natural sources and understanding their synthesis regulation can help to predict their production rates and their impact on the future recovery of the Earth's ozone layer. Here we show that the synthesis of mono-halogenated halocarbons CH3 Cl, CH3 Br, and CH3 I is a generalized process in representatives of the major marine heterotrophic bacteria groups. Furthermore, halomethane production was growth rate dependent in all the strains we studied, implying uniform synthesis regulation patterns among bacterioplankton. Using these experimental observations and in situ halomethane concentrations, we further evaluated the potential production rates associated with higher bacterial growth rates in response to global warming in a coastal environment within the Southern California Bight. Our estimates show that a 3°C temperature rise would translate into a 35%-84% increase in halomethane production rate by 2100. Overall, these data suggest that marine heterotrophic bacteria are significant producers of these climate-relevant gases and that their contribution to the atmospheric halogen budget could increase in the future, impacting the ozone layer recovery.
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Affiliation(s)
- Laura Gómez-Consarnau
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, 90089, USA
- Departamento de Oceanografía Biológica, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, 22860, Mexico
| | - Nick J Klein
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, 90089, USA
| | - Lynda S Cutter
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, 90089, USA
| | - Sergio A Sañudo-Wilhelmy
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, 90089, USA
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23
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Carpenter LJ, Chance RJ, Sherwen T, Adams TJ, Ball SM, Evans MJ, Hepach H, Hollis LDJ, Hughes C, Jickells TD, Mahajan A, Stevens DP, Tinel L, Wadley MR. Marine iodine emissions in a changing world. Proc Math Phys Eng Sci 2021; 477:20200824. [PMID: 35153549 PMCID: PMC8300602 DOI: 10.1098/rspa.2020.0824] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 01/28/2021] [Indexed: 11/12/2022] Open
Abstract
Iodine is a critical trace element involved in many diverse and important processes in the Earth system. The importance of iodine for human health has been known for over a century, with low iodine in the diet being linked to goitre, cretinism and neonatal death. Research over the last few decades has shown that iodine has significant impacts on tropospheric photochemistry, ultimately impacting climate by reducing the radiative forcing of ozone (O3) and air quality by reducing extreme O3 concentrations in polluted regions. Iodine is naturally present in the ocean, predominantly as aqueous iodide and iodate. The rapid reaction of sea-surface iodide with O3 is believed to be the largest single source of gaseous iodine to the atmosphere. Due to increased anthropogenic O3, this release of iodine is believed to have increased dramatically over the twentieth century, by as much as a factor of 3. Uncertainties in the marine iodine distribution and global cycle are, however, major constraints in the effective prediction of how the emissions of iodine and its biogeochemical cycle may change in the future or have changed in the past. Here, we present a synthesis of recent results by our team and others which bring a fresh perspective to understanding the global iodine biogeochemical cycle. In particular, we suggest that future climate-induced oceanographic changes could result in a significant change in aqueous iodide concentrations in the surface ocean, with implications for atmospheric air quality and climate.
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Affiliation(s)
- Lucy J Carpenter
- Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, UK
| | - Rosie J Chance
- Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, UK
| | - Tomás Sherwen
- Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, UK.,National Centre for Atmospheric Science (NCAS), University of York, York YO10 5DD, UK
| | - Thomas J Adams
- School of Chemistry, University of Leicester, Leicester, UK
| | - Stephen M Ball
- School of Chemistry, University of Leicester, Leicester, UK
| | - Mat J Evans
- Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, UK.,National Centre for Atmospheric Science (NCAS), University of York, York YO10 5DD, UK
| | - Helmke Hepach
- Department of Environment and Geography, University of York, Wentworth Way, Heslington, York, UK
| | | | - Claire Hughes
- Department of Environment and Geography, University of York, Wentworth Way, Heslington, York, UK
| | - Timothy D Jickells
- Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Anoop Mahajan
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune 411008, India
| | - David P Stevens
- Centre for Ocean and Atmospheric Sciences, School of Mathematics, University of East Anglia, Norwich Research Park, Norwich, UK
| | - Liselotte Tinel
- Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, UK
| | - Martin R Wadley
- Centre for Ocean and Atmospheric Sciences, School of Mathematics, University of East Anglia, Norwich Research Park, Norwich, UK
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24
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He XC, Tham YJ, Dada L, Wang M, Finkenzeller H, Stolzenburg D, Iyer S, Simon M, Kürten A, Shen J, Rörup B, Rissanen M, Schobesberger S, Baalbaki R, Wang DS, Koenig TK, Jokinen T, Sarnela N, Beck LJ, Almeida J, Amanatidis S, Amorim A, Ataei F, Baccarini A, Bertozzi B, Bianchi F, Brilke S, Caudillo L, Chen D, Chiu R, Chu B, Dias A, Ding A, Dommen J, Duplissy J, El Haddad I, Gonzalez Carracedo L, Granzin M, Hansel A, Heinritzi M, Hofbauer V, Junninen H, Kangasluoma J, Kemppainen D, Kim C, Kong W, Krechmer JE, Kvashin A, Laitinen T, Lamkaddam H, Lee CP, Lehtipalo K, Leiminger M, Li Z, Makhmutov V, Manninen HE, Marie G, Marten R, Mathot S, Mauldin RL, Mentler B, Möhler O, Müller T, Nie W, Onnela A, Petäjä T, Pfeifer J, Philippov M, Ranjithkumar A, Saiz-Lopez A, Salma I, Scholz W, Schuchmann S, Schulze B, Steiner G, Stozhkov Y, Tauber C, Tomé A, Thakur RC, Väisänen O, Vazquez-Pufleau M, Wagner AC, Wang Y, Weber SK, Winkler PM, Wu Y, Xiao M, Yan C, Ye Q, Ylisirniö A, Zauner-Wieczorek M, Zha Q, Zhou P, Flagan RC, Curtius J, Baltensperger U, Kulmala M, Kerminen VM, Kurtén T, Donahue NM, Volkamer R, Kirkby J, Worsnop DR, Sipilä M. Role of iodine oxoacids in atmospheric aerosol nucleation. Science 2021; 371:589-595. [PMID: 33542130 DOI: 10.1126/science.abe0298] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 01/06/2021] [Indexed: 11/02/2022]
Abstract
Iodic acid (HIO3) is known to form aerosol particles in coastal marine regions, but predicted nucleation and growth rates are lacking. Using the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber, we find that the nucleation rates of HIO3 particles are rapid, even exceeding sulfuric acid-ammonia rates under similar conditions. We also find that ion-induced nucleation involves IO3 - and the sequential addition of HIO3 and that it proceeds at the kinetic limit below +10°C. In contrast, neutral nucleation involves the repeated sequential addition of iodous acid (HIO2) followed by HIO3, showing that HIO2 plays a key stabilizing role. Freshly formed particles are composed almost entirely of HIO3, which drives rapid particle growth at the kinetic limit. Our measurements indicate that iodine oxoacid particle formation can compete with sulfuric acid in pristine regions of the atmosphere.
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Affiliation(s)
- Xu-Cheng He
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland.
| | - Yee Jun Tham
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Lubna Dada
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Mingyi Wang
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Henning Finkenzeller
- Department of Chemistry and Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Dominik Stolzenburg
- Faculty of Physics, University of Vienna, 1090 Vienna, Austria
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Siddharth Iyer
- Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, 33014 Tampere, Finland
| | - Mario Simon
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Andreas Kürten
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Jiali Shen
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Birte Rörup
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Matti Rissanen
- Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, 33014 Tampere, Finland
| | | | - Rima Baalbaki
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Dongyu S Wang
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Theodore K Koenig
- Department of Chemistry and Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Tuija Jokinen
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Nina Sarnela
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Lisa J Beck
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - João Almeida
- CERN, the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Stavros Amanatidis
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - António Amorim
- CENTRA and Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, Portugal
| | - Farnoush Ataei
- Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Andrea Baccarini
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Barbara Bertozzi
- Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Federico Bianchi
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Sophia Brilke
- Faculty of Physics, University of Vienna, 1090 Vienna, Austria
| | - Lucía Caudillo
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Dexian Chen
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Randall Chiu
- Department of Chemistry and Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Biwu Chu
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - António Dias
- CENTRA and Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, Portugal
| | - Aijun Ding
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
- Jiangsu Provincial Collaborative Innovation Center of Climate Change, Nanjing 210023, China
| | - Josef Dommen
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Jonathan Duplissy
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
- Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland
| | - Imad El Haddad
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | | | - Manuel Granzin
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Armin Hansel
- Institute of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
- Ionicon Analytik Ges.m.b.H., 6020 Innsbruck, Austria
| | - Martin Heinritzi
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Victoria Hofbauer
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Heikki Junninen
- Institute of Physics, University of Tartu, 50411 Tartu, Estonia
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Juha Kangasluoma
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Deniz Kemppainen
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Changhyuk Kim
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
- School of Civil and Environmental Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Weimeng Kong
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | | | - Aleksander Kvashin
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Totti Laitinen
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Houssni Lamkaddam
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Chuan Ping Lee
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Katrianne Lehtipalo
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
- Finnish Meteorological Institute, 00560 Helsinki, Finland
| | - Markus Leiminger
- Institute of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
- Ionicon Analytik Ges.m.b.H., 6020 Innsbruck, Austria
| | - Zijun Li
- Department of Applied Physics, University of Eastern Finland, 70211 Kuopio, Finland
| | - Vladimir Makhmutov
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Hanna E Manninen
- CERN, the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Guillaume Marie
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Ruby Marten
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Serge Mathot
- CERN, the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Roy L Mauldin
- Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO 80309, USA
| | - Bernhard Mentler
- Institute of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Ottmar Möhler
- Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tatjana Müller
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Wei Nie
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
- Jiangsu Provincial Collaborative Innovation Center of Climate Change, Nanjing 210023, China
| | - Antti Onnela
- CERN, the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Tuukka Petäjä
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Joschka Pfeifer
- CERN, the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Maxim Philippov
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | | | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, 28006 Madrid, Spain
| | - Imre Salma
- Institute of Chemistry, Eötvös University, H-1117 Budapest, Hungary
| | - Wiebke Scholz
- Institute of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
- Ionicon Analytik Ges.m.b.H., 6020 Innsbruck, Austria
| | - Simone Schuchmann
- Institute of Physics, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
| | - Benjamin Schulze
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Gerhard Steiner
- Institute of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Yuri Stozhkov
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | | | - António Tomé
- Institute Infante Dom Luíz, University of Beira Interior, 6201-001 Covilhã, Portugal
| | - Roseline C Thakur
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Olli Väisänen
- Department of Applied Physics, University of Eastern Finland, 70211 Kuopio, Finland
| | | | - Andrea C Wagner
- Department of Chemistry and Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, USA
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Yonghong Wang
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Stefan K Weber
- CERN, the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - Paul M Winkler
- Faculty of Physics, University of Vienna, 1090 Vienna, Austria
| | - Yusheng Wu
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Mao Xiao
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Chao Yan
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Qing Ye
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Arttu Ylisirniö
- Department of Applied Physics, University of Eastern Finland, 70211 Kuopio, Finland
| | - Marcel Zauner-Wieczorek
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Qiaozhi Zha
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Putian Zhou
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Richard C Flagan
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Joachim Curtius
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Urs Baltensperger
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Markku Kulmala
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
- Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland
- Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Veli-Matti Kerminen
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
| | - Theo Kurtén
- Department of Chemistry, University of Helsinki, University of Helsinki, 00014 Helsinki, Finland
| | - Neil M Donahue
- Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Department of Engineering and Public Policy, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Rainer Volkamer
- Department of Chemistry and Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Jasper Kirkby
- CERN, the European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland.
- Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Douglas R Worsnop
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
- Aerodyne Research, Inc., Billerica, MA 01821, USA
| | - Mikko Sipilä
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland.
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25
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Neale RE, Barnes PW, Robson TM, Neale PJ, Williamson CE, Zepp RG, Wilson SR, Madronich S, Andrady AL, Heikkilä AM, Bernhard GH, Bais AF, Aucamp PJ, Banaszak AT, Bornman JF, Bruckman LS, Byrne SN, Foereid B, Häder DP, Hollestein LM, Hou WC, Hylander S, Jansen MAK, Klekociuk AR, Liley JB, Longstreth J, Lucas RM, Martinez-Abaigar J, McNeill K, Olsen CM, Pandey KK, Rhodes LE, Robinson SA, Rose KC, Schikowski T, Solomon KR, Sulzberger B, Ukpebor JE, Wang QW, Wängberg SÅ, White CC, Yazar S, Young AR, Young PJ, Zhu L, Zhu M. Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2020. Photochem Photobiol Sci 2021; 20:1-67. [PMID: 33721243 PMCID: PMC7816068 DOI: 10.1007/s43630-020-00001-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 11/10/2020] [Indexed: 01/31/2023]
Abstract
This assessment by the Environmental Effects Assessment Panel (EEAP) of the United Nations Environment Programme (UNEP) provides the latest scientific update since our most recent comprehensive assessment (Photochemical and Photobiological Sciences, 2019, 18, 595-828). The interactive effects between the stratospheric ozone layer, solar ultraviolet (UV) radiation, and climate change are presented within the framework of the Montreal Protocol and the United Nations Sustainable Development Goals. We address how these global environmental changes affect the atmosphere and air quality; human health; terrestrial and aquatic ecosystems; biogeochemical cycles; and materials used in outdoor construction, solar energy technologies, and fabrics. In many cases, there is a growing influence from changes in seasonality and extreme events due to climate change. Additionally, we assess the transmission and environmental effects of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which is responsible for the COVID-19 pandemic, in the context of linkages with solar UV radiation and the Montreal Protocol.
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Affiliation(s)
- R E Neale
- Population Health Department, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - P W Barnes
- Biological Sciences and Environmental Program, Loyola University New Orleans, New Orleans, LA, USA
| | - T M Robson
- Organismal and Evolutionary Biology (OEB), Viikki Plant Sciences Centre (ViPS), University of Helsinki, Helsinki, Finland
| | - P J Neale
- Smithsonian Environmental Research Center, Maryland, USA
| | - C E Williamson
- Department of Biology, Miami University, Oxford, OH, USA
| | - R G Zepp
- ORD/CEMM, US Environmental Protection Agency, Athens, GA, USA
| | - S R Wilson
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, Australia
| | - S Madronich
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | - A L Andrady
- Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, USA
| | - A M Heikkilä
- Finnish Meteorological Institute, Helsinki, Finland
| | - G H Bernhard
- Biospherical Instruments Inc, San Diego, CA, USA
| | - A F Bais
- Department of Physics, Laboratory of Atmospheric Physics, Aristotle University, Thessaloniki, Greece
| | - P J Aucamp
- Ptersa Environmental Consultants, Pretoria, South Africa
| | - A T Banaszak
- Unidad Académica de Sistemas Arrecifales, Universidad Nacional Autónoma de México, Puerto Morelos, México
| | - J F Bornman
- Food Futures Institute, Murdoch University, Perth, Australia.
| | - L S Bruckman
- Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - S N Byrne
- The University of Sydney, School of Medical Sciences, Discipline of Applied Medical Science, Sydney, Australia
| | - B Foereid
- Environment and Natural Resources, Norwegian Institute of Bioeconomy Research, Ås, Norway
| | - D-P Häder
- Department of Biology, Friedrich-Alexander University, Möhrendorf, Germany
| | - L M Hollestein
- Department of Dermatology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands
| | - W-C Hou
- Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan, Republic of China
| | - S Hylander
- Centre for Ecology and Evolution in Microbial model Systems-EEMiS, Linnaeus University, Kalmar, Sweden.
| | - M A K Jansen
- School of BEES, Environmental Research Institute, University College Cork, Cork, Ireland
| | - A R Klekociuk
- Antarctic Climate Program, Australian Antarctic Division, Kingston, Australia
| | - J B Liley
- National Institute of Water and Atmospheric Research, Lauder, New Zealand
| | - J Longstreth
- The Institute for Global Risk Research, LLC, Bethesda, MD, USA
| | - R M Lucas
- National Centre of Epidemiology and Population Health, Australian National University, Canberra, Australia
| | - J Martinez-Abaigar
- Faculty of Science and Technology, University of La Rioja, Logroño, Spain
| | | | - C M Olsen
- Cancer Control Group, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - K K Pandey
- Department of Wood Properties and Uses, Institute of Wood Science and Technology, Bangalore, India
| | - L E Rhodes
- Photobiology Unit, Dermatology Research Centre, School of Biological Sciences, Faculty of Biology Medicine and Health, University of Manchester, Manchester, UK
| | - S A Robinson
- Securing Antarctica's Environmental Future, Global Challenges Program and School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, Australia
| | - K C Rose
- Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY, USA
| | - T Schikowski
- IUF-Leibniz Institute of Environmental Medicine, Dusseldorf, Germany
| | - K R Solomon
- Centre for Toxicology, School of Environmental Sciences, University of Guelph, Guelph, Canada
| | - B Sulzberger
- Academic Guest Eawag: Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland
| | - J E Ukpebor
- Chemistry Department, Faculty of Physical Sciences, University of Benin, Benin City, Nigeria
| | - Q-W Wang
- Institute of Applied Ecology, Chinese Academy of Sciences (CAS), Shenyang, China
| | - S-Å Wängberg
- Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden
| | - C C White
- Bee America, 5409 Mohican Rd, Bethesda, MD, USA
| | - S Yazar
- Garvan Institute of Medical Research, Sydney, Australia
| | - A R Young
- St John's Institute of Dermatology, King's College London, London, UK
| | - P J Young
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - L Zhu
- Center for Advanced Low-Dimension Materials, Donghua University, Shanghai, China
| | - M Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, China
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26
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Tinel L, Adams TJ, Hollis LDJ, Bridger AJM, Chance RJ, Ward MW, Ball SM, Carpenter LJ. Influence of the Sea Surface Microlayer on Oceanic Iodine Emissions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:13228-13237. [PMID: 32975119 PMCID: PMC7586339 DOI: 10.1021/acs.est.0c02736] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 05/26/2023]
Abstract
The influence of organic compounds on iodine (I2) emissions from the O3 + I- reaction at the sea surface was investigated in laboratory and modeling studies using artificial solutions, natural subsurface seawater (SSW), and, for the first time, samples of the surface microlayer (SML). Gas-phase I2 was measured directly above the surface of liquid samples using broadband cavity enhanced absorption spectroscopy. I2 emissions were consistently lower for artificial seawater (AS) than buffered potassium iodide (KI) solutions. Natural seawater samples showed the strongest reduction of I2 emissions compared to artificial solutions with equivalent [I-], and the reduction was more pronounced over SML than SSW. Emissions of volatile organic iodine (VOI) were highest from SML samples but remained a negligible fraction (<1%) of the total iodine flux. Therefore, reduced iodine emissions from natural seawater cannot be explained by chemical losses of I2 or hypoiodous acid (HOI), leading to VOI. An interfacial model explains this reduction by increased solubility of the I2 product in the organic-rich interfacial layer of seawater. Our results highlight the importance of using environmentally representative concentrations in studies of the O3 + I- reaction and demonstrate the influence the SML exerts on emissions of iodine and potentially other volatile species.
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Affiliation(s)
- Liselotte Tinel
- Department
of Chemistry, University of York, York YO10 5DD, U.K.
| | - Thomas J. Adams
- School
of Chemistry, University of Leicester, Leicester LE1 7RH, U.K.
- Ricardo
Energy & Environment, Harwell, Oxfordshire OX11 0QR, U.K.
| | | | | | - Rosie J. Chance
- Department
of Chemistry, University of York, York YO10 5DD, U.K.
| | - Martyn W. Ward
- Department
of Chemistry, University of York, York YO10 5DD, U.K.
| | - Stephen M. Ball
- School
of Chemistry, University of Leicester, Leicester LE1 7RH, U.K.
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27
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Tang PH, So PB, Lee KR, Lai YL, Lee CS, Lin CH. Metal Organic Framework-Polyethersulfone Composite Membrane for Iodine Capture. Polymers (Basel) 2020; 12:polym12102309. [PMID: 33050253 PMCID: PMC7600638 DOI: 10.3390/polym12102309] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 11/20/2022] Open
Abstract
A variety of metal organic frameworks (MOFs) were synthesized and evaluated for their iodine adsorption capacity. Out of the MOFs tested, ZIF-8 showed the most promising result with an iodine vapor uptake of 876.6 mg/g. ZIF-8 was then incorporated into a polymer, polyethersulfone (PES), at different proportions to prepare mixed matrix membranes (MMMs), which were then used to perform further iodine adsorption experiments. With a mixing ratio of 40 wt % of ZIF-8, the iodine adsorption capacity reached 1387.6 mg/g, wherein an astounding 60% improvement in adsorption was seen with the MMMs prepared compared to the original ZIF-8 powder.
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Affiliation(s)
- Po-Hsiang Tang
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan;
| | - Pamela Berilyn So
- Department of Chemistry, Chung Yuan Christian University, Taoyuan City 32023, Taiwan;
| | - Kueir-Rarn Lee
- R&D Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan University, Chung-Li 32023, Taiwan;
| | - Yu-Lun Lai
- Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan; (Y.-L.L.); (C.-S.L.)
| | - Cheng-Shiuan Lee
- Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan; (Y.-L.L.); (C.-S.L.)
| | - Chia-Her Lin
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan;
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan City 32023, Taiwan
- Correspondence:
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28
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A gas-to-particle conversion mechanism helps to explain atmospheric particle formation through clustering of iodine oxides. Nat Commun 2020; 11:4521. [PMID: 32908140 PMCID: PMC7481236 DOI: 10.1038/s41467-020-18252-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 08/12/2020] [Indexed: 11/10/2022] Open
Abstract
Emitted from the oceans, iodine-bearing molecules are ubiquitous in the atmosphere and a source of new atmospheric aerosol particles of potentially global significance. However, its inclusion in atmospheric models is hindered by a lack of understanding of the first steps of the photochemical gas-to-particle conversion mechanism. Our laboratory results show that under a high humidity and low HOx regime, the recently proposed nucleating molecule (iodic acid, HOIO2) does not form rapidly enough, and gas-to-particle conversion proceeds by clustering of iodine oxides (IxOy), albeit at slower rates than under dryer conditions. Moreover, we show experimentally that gas-phase HOIO2 is not necessary for the formation of HOIO2-containing particles. These insights help to explain new particle formation in the relatively dry polar regions and, more generally, provide for the first time a thermochemically feasible molecular mechanism from ocean iodine emissions to atmospheric particles that is currently missing in model calculations of aerosol radiative forcing. “How iodine-bearing molecules contribute to atmospheric aerosol formation is not well understood. Here, the authors provide a new gas-to-particle conversion mechanism and show that clustering of iodine oxides is an essential component of this process while previously proposed iodic acid does not play a large role.”
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29
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Kumar M, Trabelsi T, Gómez Martín JC, Saiz-Lopez A, Francisco JS. HIO x-IONO 2 Dynamics at the Air-Water Interface: Revealing the Existence of a Halogen Bond at the Atmospheric Aerosol Surface. J Am Chem Soc 2020; 142:12467-12477. [PMID: 32578419 DOI: 10.1021/jacs.0c05232] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Iodine is enriched in marine aerosols, particularly in coastal mid-latitude atmospheric environments, where it initiates the formation of new aerosol particles with iodic acid (HIO3) composition. However, particle formation in polluted and semipolluted locations is inhibited when the iodine monoxide radical (IO) is intercepted by NO2 to form the iodine nitrate (IONO2). The primary fate of IONO2 is believed to be, besides photolysis, uptake by aerosol surfaces, leading to particulate iodine activation. Herein we have performed Born-Oppenheimer molecular dynamics (BOMD) simulations and gas-phase quantum chemical calculations to study the iodine acids-iodine nitrate [HIOx (x = 2 and 3)-IONO2] dynamics at the air-water interface modeled by a water droplet of 191 water molecules. The results indicate that IONO2 does not react directly with these iodine acids, but forms an unusual kind of interaction with them within a few picoseconds, which is characterized as halogen bonding. The halogen bond-driven HIO3-IONO2 complex at the air-water interface undergoes deprotonation and exists as IO3--IONO2 anion, whereas the HIO2-IONO2 complex does not exhibit any proton loss to the interfacial water molecules. The gas-phase quantum chemical calculations suggest that the HIO3-IONO2 and HIO2-IONO2 complexes have appreciable stabilization energies, which are significantly enhanced upon deprotonation of iodine acids, indicating that these halogen bonds are fairly stable. These IONO2-induced halogen bonds explain the rapid loss of IONO2 to background aerosol. Moreover, they appear to work against iodide formation. Thus, they may play an important role in enhancing the amount of atmospherically nonrecyclable iodine (iodate) in marine aerosol.
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Affiliation(s)
- Manoj Kumar
- Department of Earth and Environmental Science and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Tarek Trabelsi
- Department of Earth and Environmental Science and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Juan Carlos Gómez Martín
- Solar System Department, Andalusian Institute for Astrophysics, Consejo Superior de Investigaciones Científicas, Granada 18008, Spain
| | - Alfonso Saiz-Lopez
- Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, Consejo Superior de Investigaciones Científicas, Madrid 28006, Spain
| | - Joseph S Francisco
- Department of Earth and Environmental Science and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
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