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Ringsdorf A, Edtbauer A, Vilà-Guerau de Arellano J, Pfannerstill EY, Gromov S, Kumar V, Pozzer A, Wolff S, Tsokankunku A, Soergel M, Sá MO, Araújo A, Ditas F, Poehlker C, Lelieveld J, Williams J. Inferring the diurnal variability of OH radical concentrations over the Amazon from BVOC measurements. Sci Rep 2023; 13:14900. [PMID: 37689759 PMCID: PMC10492859 DOI: 10.1038/s41598-023-41748-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 08/31/2023] [Indexed: 09/11/2023] Open
Abstract
The atmospheric oxidation of biogenic volatile organic compounds (BVOC) by OH radicals over tropical rainforests impacts local particle production and the lifetime of globally distributed chemically and radiatively active gases. For the pristine Amazon rainforest during the dry season, we empirically determined the diurnal OH radical variability at the forest-atmosphere interface region between 80 and 325 m from 07:00 to 15:00 LT using BVOC measurements. A dynamic time warping approach was applied showing that median averaged mixing times between 80 to 325 m decrease from 105 to 15 min over this time period. The inferred OH concentrations show evidence for an early morning OH peak (07:00-08:00 LT) and an OH maximum (14:00 LT) reaching 2.2 (0.2, 3.8) × 106 molecules cm-3 controlled by the coupling between BVOC emission fluxes, nocturnal NOx accumulation, convective turbulence, air chemistry and photolysis rates. The results were evaluated with a turbulence resolving transport (DALES), a regional scale (WRF-Chem) and a global (EMAC) atmospheric chemistry model.
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Affiliation(s)
- A Ringsdorf
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany.
| | - A Edtbauer
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
| | - J Vilà-Guerau de Arellano
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
- Meteorology and Air Quality Section, Wageningen University, Wageningen, The Netherlands
| | - E Y Pfannerstill
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
| | - S Gromov
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
| | - V Kumar
- Satellite Remote Sensing Group, Max Planck Institute for Chemistry, Mainz, Germany
| | - A Pozzer
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
| | - S Wolff
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
| | - A Tsokankunku
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
| | - M Soergel
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Sachgebiet Arbeitssicherheit, Erlangen, Germany
| | - M O Sá
- Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, CEP 69067-375, Brazil
| | - A Araújo
- Empresa Brasileira de Pesquisa Agropecuária (Embrapa) Amazonia Oriental, Belém, CEP 66095-100, Brazil
| | - F Ditas
- Department of Multiphase Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
- Hessian Agency for Nature Conservation, Environment and Geology, Wiesbaden, Germany
| | - C Poehlker
- Department of Multiphase Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
| | - J Lelieveld
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
- Climate and Atmosphere Research Center, The Cyprus Institute, 1645, Nicosia, Cyprus
| | - J Williams
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany.
- Climate and Atmosphere Research Center, The Cyprus Institute, 1645, Nicosia, Cyprus.
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Bourtsoukidis E, Pozzer A, Sattler T, Matthaios VN, Ernle L, Edtbauer A, Fischer H, Könemann T, Osipov S, Paris JD, Pfannerstill EY, Stönner C, Tadic I, Walter D, Wang N, Lelieveld J, Williams J. The Red Sea Deep Water is a potent source of atmospheric ethane and propane. Nat Commun 2020; 11:447. [PMID: 31992702 PMCID: PMC6987153 DOI: 10.1038/s41467-020-14375-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 01/02/2020] [Indexed: 11/21/2022] Open
Abstract
Non-methane hydrocarbons (NMHCs) such as ethane and propane are significant atmospheric pollutants and precursors of tropospheric ozone, while the Middle East is a global emission hotspot due to extensive oil and gas production. Here we compare in situ hydrocarbon measurements, performed around the Arabian Peninsula, with global model simulations that include current emission inventories (EDGAR) and state-of-the-art atmospheric circulation and chemistry mechanisms (EMAC model). While measurements of high mixing ratios over the Arabian Gulf are adequately simulated, strong underprediction by the model was found over the northern Red Sea. By examining the individual sources in the model and by utilizing air mass back-trajectory investigations and Positive Matrix Factorization (PMF) analysis, we deduce that Red Sea Deep Water (RSDW) is an unexpected, potent source of atmospheric NMHCs. This overlooked underwater source is comparable with total anthropogenic emissions from entire Middle Eastern countries, and significantly impacts the regional atmospheric chemistry.
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Affiliation(s)
- E Bourtsoukidis
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany.
| | - A Pozzer
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - T Sattler
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - V N Matthaios
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - L Ernle
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - A Edtbauer
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - H Fischer
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - T Könemann
- Department of Multiphase Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - S Osipov
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - J-D Paris
- Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, UMR8212, IPSL, Gif-Sur-Yvette, France
| | - E Y Pfannerstill
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - C Stönner
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - I Tadic
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - D Walter
- Department of Multiphase Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
- Max Planck Institute for Biogeochemistry, Hans-Knöll-Straße 10, 07745, Jena, Germany
| | - N Wang
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
| | - J Lelieveld
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
- Energy, Environment and Water Research Center, The Cyprus Institute, Nicosia, Cyprus
| | - J Williams
- Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, 55128, Germany
- Energy, Environment and Water Research Center, The Cyprus Institute, Nicosia, Cyprus
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Stönner C, Edtbauer A, Williams J. Real-world volatile organic compound emission rates from seated adults and children for use in indoor air studies. Indoor Air 2018; 28:164-172. [PMID: 28683154 DOI: 10.1111/ina.12405] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 06/30/2017] [Indexed: 05/15/2023]
Abstract
Human beings emit many volatile organic compounds (VOCs) of both endogenous (internally produced) and exogenous (external source) origin. Here we present real-world emission rates of volatile organic compounds from cinema audiences (50-230 people) as a function of time in multiple screenings of three films. The cinema location and film selection allowed high-frequency measurement of human-emitted VOCs within a room flushed at a known rate so that emissions rates could be calculated for both adults and children. Gas-phase emission rates are analyzed as a function of time of day, variability during the film, and age of viewer. The average emission rates of CO2 , acetone, and isoprene were lower (by a factor of ~1.2-1.4) for children under twelve compared to adults while for acetaldehyde emission rates were equivalent. Molecules influenced by exogenous sources such as decamethylcyclopentasiloxanes and methanol tended to decrease over the course of day and then rise for late evening screenings. These results represent average emission rates of people under real-world conditions and can be used in indoor air quality assessments and building design. Averaging over a large number of people generates emission rates that are less susceptible to individual behaviors.
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Affiliation(s)
- C Stönner
- Max Planck-Institute for Chemistry, Mainz, Germany
| | - A Edtbauer
- Max Planck-Institute for Chemistry, Mainz, Germany
| | - J Williams
- Max Planck-Institute for Chemistry, Mainz, Germany
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Mitterdorfer C, Edtbauer A, Karolczak S, Postler J, Gschliesser D, Denifl S, Illenberger E, Scheier P. Strong fragmentation processes driven by low energy electron attachment to various small perfluoroether molecules. Int J Mass Spectrom 2011; 306:63-69. [PMID: 21977005 PMCID: PMC3161377 DOI: 10.1016/j.ijms.2011.06.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 06/03/2011] [Accepted: 06/24/2011] [Indexed: 05/13/2023]
Abstract
Negative ion formation in the three perfluoroethers (PFEs) diglyme (C(6)F(14)O(3)), triglyme (C(8)F(18)O(4)) and crownether (C(10)F(20)O(5)) is studied following electron attachment in the range from ∼0 to 15 eV. All three compounds show intense low energy resonances at subexcitation energies (<3 eV) decomposing into a variety of negatively charged fragments. These fragment ions are generated via dissociative electron attachment (DEA), partly originating from sequential decompositions on the metastable (μs) time scale as observed from the MIKE (metastable induced kinetic energy) scans. Only in perfluorocrownether a signal due to the non-decomposed parent anion is observed. Additional and comparatively weaker resonances are located in the energy range between ∼10 and 17 eV which preferentially decompose into lighter ions. It is suggested that specific features of perfluoropolyethers (PFPEs) relevant in applications, e.g., the strong bonding to surfaces induced by UV radiation of the substrate or degradation of PFPE films in computer hard disc drives can be explained by their pronounced sensitivity towards low energy electrons.
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Affiliation(s)
- C. Mitterdorfer
- Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - A. Edtbauer
- Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - S. Karolczak
- Institute of Applied Radiation Chemistry (IARC) Technical University of Lodz, ul. Wroblewskiego 15, 93-590 Lodz, Poland
| | - J. Postler
- Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - D. Gschliesser
- Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - S. Denifl
- Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
- Corresponding author. Tel.: +43 0 512 507 6416; fax: +43 0 512 507 2932.
| | - E. Illenberger
- Institut für Chemie und Biochemie-Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany
| | - P. Scheier
- Institut für Ionenphysik und Angewandte Physik, Leopold Franzens Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
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Mauracher A, Denifl S, Edtbauer A, Hager M, Probst M, Echt O, Märk TD, Scheier P, Field TA, Graupner K. Metastable anions of dinitrobenzene: resonances for electron attachment and kinetic energy release. J Chem Phys 2011; 133:244302. [PMID: 21197988 DOI: 10.1063/1.3514931] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Attachment of free, low-energy electrons to dinitrobenzene (DNB) in the gas phase leads to DNB(-) as well as several fragment anions. DNB(-), (DNB-H)(-), (DNB-NO)(-), (DNB-2NO)(-), and (DNB-NO(2))(-) are found to undergo metastable (unimolecular) dissociation. A rich pattern of resonances in the yield of these metastable reactions versus electron energy is observed; some resonances are highly isomer-specific. Most metastable reactions are accompanied by large average kinetic energy releases (KER) that range from 0.5 to 1.32 eV, typical of complex rearrangement reactions, but (1,3-DNB-H)(-) features a resonance with a KER of only 0.06 eV for loss of NO. (1,3-DNB-NO)(-) offers a rare example of a sequential metastable reaction, namely, loss of NO followed by loss of CO to yield C(5)H(4)O(-) with a large KER of 1.32 eV. The G4(MP2) method is applied to compute adiabatic electron affinities and reaction energies for several of the observed metastable channels.
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Affiliation(s)
- A Mauracher
- Institut für Ionenphysik und Angewandte Physik and Center for Molecular Biosciences Innsbruck, Leopold Franzens Universität, 6020 Innsbruck, Austria
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Hamann T, Edtbauer A, Ferreira da Silva F, Denifl S, Scheier P, Swiderek P. Dissociative electron attachment to gas-phase formamide. Phys Chem Chem Phys 2011; 13:12305-13. [DOI: 10.1039/c1cp20833k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Edtbauer A, Sulzer P, Mauracher A, Mitterdorfer C, Ferreira da Silva F, Denifl S, Märk TD, Probst M, Nunes Y, Limão-Vieira P, Scheier P. Dissociative electron attachment to pentaerythritol tetranitrate: Significant fragmentation near 0 eV. J Chem Phys 2010; 132:134305. [DOI: 10.1063/1.3386386] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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