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Chen Z, Liu J, Qie X, Cheng X, Yang M, Shu L, Zang Z. Stratospheric influence on surface ozone pollution in China. Nat Commun 2024; 15:4064. [PMID: 38744875 PMCID: PMC11093980 DOI: 10.1038/s41467-024-48406-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 04/30/2024] [Indexed: 05/16/2024] Open
Abstract
Events of stratospheric intrusions to the surface (SITS) can lead to severe ozone (O3) pollution. Still, to what extent SITS events impact surface O3 on a national scale over years remains a long-lasting question, mainly due to difficulty of resolving three key SITS metrics: frequency, duration and intensity. Here, we identify 27,616 SITS events over China during 2015-2022 based on spatiotemporally dense surface measurements of O3 and carbon monoxide, two effective indicators of SITS. An overview of the three metrics is presented, illustrating large influences of SITS on surface O3 in China. We find that SITS events occur preferentially in high-elevation regions, while those in plain regions are more intense. SITS enhances surface O3 by 20 ppbv on average, contributing to 30-45% of O3 during SITS periods. Nationally, SITS-induced O3 peaks in spring and autumn, while over 70% of SITS events during the warm months exacerbate O3 pollution. Over 2015-2022, SITS-induced O3 shows a declining trend. Our observation-based results can have implications for O3 mitigation policies in short and long terms.
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Affiliation(s)
- Zhixiong Chen
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
| | - Jane Liu
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China.
- Department of Geography and Planning, University of Toronto, Toronto, ON, Canada.
| | - Xiushu Qie
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
| | - Xugeng Cheng
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Mengmiao Yang
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Lei Shu
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, China
| | - Zhou Zang
- Department of Geography and Planning, University of Toronto, Toronto, ON, Canada
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2
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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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3
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Charlesworth E, Plöger F, Birner T, Baikhadzhaev R, Abalos M, Abraham NL, Akiyoshi H, Bekki S, Dennison F, Jöckel P, Keeble J, Kinnison D, Morgenstern O, Plummer D, Rozanov E, Strode S, Zeng G, Egorova T, Riese M. Stratospheric water vapor affecting atmospheric circulation. Nat Commun 2023; 14:3925. [PMID: 37400442 DOI: 10.1038/s41467-023-39559-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 06/19/2023] [Indexed: 07/05/2023] Open
Abstract
Water vapor plays an important role in many aspects of the climate system, by affecting radiation, cloud formation, atmospheric chemistry and dynamics. Even the low stratospheric water vapor content provides an important climate feedback, but current climate models show a substantial moist bias in the lowermost stratosphere. Here we report crucial sensitivity of the atmospheric circulation in the stratosphere and troposphere to the abundance of water vapor in the lowermost stratosphere. We show from a mechanistic climate model experiment and inter-model variability that lowermost stratospheric water vapor decreases local temperatures, and thereby causes an upward and poleward shift of subtropical jets, a strengthening of the stratospheric circulation, a poleward shift of the tropospheric eddy-driven jet and regional climate impacts. The mechanistic model experiment in combination with atmospheric observations further shows that the prevailing moist bias in current models is likely caused by the transport scheme, and can be alleviated by employing a less diffusive Lagrangian scheme. The related effects on atmospheric circulation are of similar magnitude as climate change effects. Hence, lowermost stratospheric water vapor exerts a first order effect on atmospheric circulation and improving its representation in models offers promising prospects for future research.
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Affiliation(s)
- Edward Charlesworth
- Institute for Energy and Climate Research: Stratosphere (IEK-7), Research Center Jülich, Jülich, Germany.
| | - Felix Plöger
- Institute for Energy and Climate Research: Stratosphere (IEK-7), Research Center Jülich, Jülich, Germany
- Institute for Atmospheric and Environmental Research, University of Wuppertal, Wuppertal, Germany
| | - Thomas Birner
- Meteorological Institute Munich, Ludwig Maximilians University of Munich, Munich, Germany
| | - Rasul Baikhadzhaev
- Institute for Energy and Climate Research: Stratosphere (IEK-7), Research Center Jülich, Jülich, Germany
| | - Marta Abalos
- Earth Physics and Astrophysics Department, Universidad Complutense de Madrid, Madrid, Spain
| | - Nathan Luke Abraham
- National Centre for Atmospheric Science (NCAS), University of Cambridge, Cambridge, UK
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | | | - Slimane Bekki
- Laboratoire de Météorologie Dynamique (LMD/IPSL), Palaiseau, France
| | - Fraser Dennison
- Commonwealth Scientific and Industrial Research Organization (CSIRO) Environment, Aspendale, VIC, 3195, Australia
| | - Patrick Jöckel
- Institut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Germany
| | - James Keeble
- National Centre for Atmospheric Science (NCAS), University of Cambridge, Cambridge, UK
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | - Doug Kinnison
- Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, 80301, USA
| | - Olaf Morgenstern
- National Institute of Water and Atmospheric Research, Wellington, New Zealand
| | - David Plummer
- Climate Research Branch, Environment and Climate Change Canada, Montreal, Canada
| | - Eugene Rozanov
- Physikalisch-Meteorologisches Observatorium, Davos World Radiation Center, Davos Dorf, Switzerland
| | - Sarah Strode
- Goddard Earth Sciences Technology and Research (GESTAR-II), Morgan State University, Baltimore, MD, 21251, USA
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
| | - Guang Zeng
- National Institute of Water and Atmospheric Research, Wellington, New Zealand
| | - Tatiana Egorova
- Physikalisch-Meteorologisches Observatorium, Davos World Radiation Center, Davos Dorf, Switzerland
| | - Martin Riese
- Institute for Energy and Climate Research: Stratosphere (IEK-7), Research Center Jülich, Jülich, Germany
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4
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Nowack P, Ceppi P, Davis SM, Chiodo G, Ball W, Diallo MA, Hassler B, Jia Y, Keeble J, Joshi M. Response of stratospheric water vapour to warming constrained by satellite observations. NATURE GEOSCIENCE 2023; 16:577-583. [PMID: 37441270 PMCID: PMC10333120 DOI: 10.1038/s41561-023-01183-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 04/12/2023] [Indexed: 07/15/2023]
Abstract
Future increases in stratospheric water vapour risk amplifying climate change and slowing down the recovery of the ozone layer. However, state-of-the-art climate models strongly disagree on the magnitude of these increases under global warming. Uncertainty primarily arises from the complex processes leading to dehydration of air during its tropical ascent into the stratosphere. Here we derive an observational constraint on this longstanding uncertainty. We use a statistical-learning approach to infer historical co-variations between the atmospheric temperature structure and tropical lower stratospheric water vapour concentrations. For climate models, we demonstrate that these historically constrained relationships are highly predictive of the water vapour response to increased atmospheric carbon dioxide. We obtain an observationally constrained range for stratospheric water vapour changes per degree of global warming of 0.31 ± 0.39 ppmv K-1. Across 61 climate models, we find that a large fraction of future model projections are inconsistent with observational evidence. In particular, frequently projected strong increases (>1 ppmv K-1) are highly unlikely. Our constraint represents a 50% decrease in the 95th percentile of the climate model uncertainty distribution, which has implications for surface warming, ozone recovery and the tropospheric circulation response under climate change.
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Affiliation(s)
- Peer Nowack
- Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, UK
- Grantham Institute and Department of Physics, Imperial College London, London, UK
- Data Science Institute, Imperial College London, London, UK
- Institute of Theoretical Informatics, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Paulo Ceppi
- Grantham Institute and Department of Physics, Imperial College London, London, UK
| | | | - Gabriel Chiodo
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
| | - Will Ball
- Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
- Department of Geoscience and Remote Sensing, Delft University of Technology, Delft, The Netherlands
- Physikalisch-Meteorologisches Observatorium Davos World Radiation Centre, Davos, Switzerland
| | - Mohamadou A. Diallo
- Institute of Energy and Climate Research, Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany
| | - Birgit Hassler
- Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
| | - Yue Jia
- NOAA Chemical Sciences Laboratory, Boulder, CO USA
- Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado Boulder, Boulder, CO USA
| | - James Keeble
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
- National Centre for Atmospheric Science (NCAS), University of Cambridge, Cambridge, UK
| | - Manoj Joshi
- Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, UK
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5
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von der Gathen P, Kivi R, Wohltmann I, Salawitch RJ, Rex M. Climate change favours large seasonal loss of Arctic ozone. Nat Commun 2021; 12:3886. [PMID: 34162857 PMCID: PMC8222337 DOI: 10.1038/s41467-021-24089-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 05/26/2021] [Indexed: 11/21/2022] Open
Abstract
Chemical loss of Arctic ozone due to anthropogenic halogens is driven by temperature, with more loss occurring during cold winters favourable for formation of polar stratospheric clouds (PSCs). We show that a positive, statistically significant rise in the local maxima of PSC formation potential (PFPLM) for cold winters is apparent in meteorological data collected over the past half century. Output from numerous General Circulation Models (GCMs) also exhibits positive trends in PFPLM over 1950 to 2100, with highest values occurring at end of century, for simulations driven by a large rise in the radiative forcing of climate from greenhouse gases (GHGs). We combine projections of stratospheric halogen loading and humidity with GCM-based forecasts of temperature to suggest that conditions favourable for large, seasonal loss of Arctic column O3 could persist or even worsen until the end of this century, if future abundances of GHGs continue to steeply rise.
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Affiliation(s)
- Peter von der Gathen
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany.
| | - Rigel Kivi
- Finnish Meteorological Institute, Space and Earth Observation Centre, Sodankylä, Finland
| | - Ingo Wohltmann
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
| | - Ross J Salawitch
- Department of Atmospheric and Oceanic Science, Department of Chemistry and Biochemistry, and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA
| | - Markus Rex
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
- Universität Potsdam, Institut für Physik und Astronomie, Potsdam, Germany
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6
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Evaluation of CLARA-A2 and ISCCP-H Cloud Cover Climate Data Records over Europe with ECA&D Ground-Based Measurements. REMOTE SENSING 2019. [DOI: 10.3390/rs11020212] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Clouds are of high importance for the climate system but they still remain one of its principal uncertainties. Remote sensing techniques applied to satellite observations have assisted tremendously in the creation of long-term and homogeneous data records; however, satellite data sets need to be validated and compared with other data records, especially ground measurements. In the present study, the spatiotemporal distribution and variability of Total Cloud Cover (TCC) from the Satellite Application Facility on Climate Monitoring (CM SAF) Cloud, Albedo And Surface Radiation dataset from AVHRR data—edition 2 (CLARA-A2) and the International Satellite Cloud Climatology Project H-series (ISCCP-H) is analyzed over Europe. The CLARA-A2 data record has been created using measurements of the Advanced Very High Resolution Radiometer (AVHRR) instrument onboard the polar orbiting NOAA and the EUMETSAT MetOp satellites, whereas the ISCCP-H data were produced by a combination of measurements from geostationary meteorological satellites and the AVHRR instrument on the polar orbiting satellites. An intercomparison of the two data records is performed over their common period, 1984 to 2012. In addition, a comparison of the two satellite data records is made against TCC observations at 22 meteorological stations in Europe, from the European Climate Assessment & Dataset (ECA&D). The results indicate generally larger ISCCP-H TCC with respect to the corresponding CLARA-A2 data, in particular in the Mediterranean. Compared to ECA&D data, both satellite datasets reveal a reasonable performance, with overall mean TCC biases of 2.1 and 5.2% for CLARA-A2 and ISCCP-H, respectively. This, along with the higher correlation coefficients between CLARA-A2 and ECA&D TCC, indicates the better performance of CLARA-A2 TCC data.
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7
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Improved Global Surface Temperature Simulation using Stratospheric Ozone Forcing with More Accurate Variability. Sci Rep 2018; 8:14474. [PMID: 30262911 PMCID: PMC6160484 DOI: 10.1038/s41598-018-32656-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 09/12/2018] [Indexed: 11/18/2022] Open
Abstract
Increasingly, studies have pointed out that variations of stratospheric ozone significantly influence climate change in the Northern and Southern hemispheres. This leads us to consider whether making the variations of stratospheric ozone in a climate model closer to real ozone changes would improve the simulation of global climate change. It is found that replacing the original specified stratospheric ozone forcing with more accurate stratospheric ozone variations improves the simulated variations of surface temperature in a climate model. The improved stratospheric ozone variations in the Northern Hemisphere lead to better simulation of variations in Northern Hemisphere circulation. As a result, the simulated variabilities of surface temperature in the middle of the Eurasian continent and in lower latitudes are improved. In the Southern Hemisphere, improvements in surface temperature variations that result from improved stratospheric ozone variations influence the simulation of westerly winds. The simulations also suggest that the decreasing trend of stratospheric ozone may have enhanced the warming trend at high latitudes in the second half of the 20th century. Our results not only reinforce the importance of accurately simulating the stratospheric ozone but also imply the need for including fully coupled stratospheric dynamical–radiative–chemical processes in climate models to predict future climate changes.
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8
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Garfinkel CI, Gordon A, Oman LD, Li F, Davis S, Pawson S. Nonlinear response of tropical lower stratospheric temperature and water vapor to ENSO. ATMOSPHERIC CHEMISTRY AND PHYSICS 2018; 18:4597-4615. [PMID: 30008736 PMCID: PMC6041696 DOI: 10.5194/acp-18-4597-2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A series of simulations using the NASA Goddard Earth Observing System Chemistry-Climate Model are analyzed in order to assess interannual and sub-decadal variability in the tropical lower stratosphere over the past 35 years. The impact of El Niño-Southern Oscillation on temperature and water vapor in this region is nonlinear in boreal spring. While moderate El Niño events lead to cooling in this region, strong El Niño events lead to warming, even as the response of the large scale Brewer Dobson Circulation appears to scale nearly linearly with El Niño. This nonlinearity is shown to arise from the response in the Indo-West Pacific to El Niño: strong El Niño events lead to tropospheric warming extending into the tropical tropopause layer and up to the cold point in this region, where it allows for more water vapor to enter the stratosphere. The net effect is that both strong La Niña and strong El Niño events lead to enhanced entry water vapor and stratospheric moistening in boreal spring and early summer. These results lead to the following interpretation of the contribution of sea surface temperatures to the decline in water vapor from the late 1990s to the early 2000s: the very strong El Niño event in 1997/1998, followed by more than two consecutive years of La Niña, led to enhanced lower stratospheric water vapor. As this period ended in early 2001, entry water vapor concentrations declined. This effect accounts for approximately one-quarter of the observed drop.
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Affiliation(s)
- Chaim I Garfinkel
- The Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Amit Gordon
- The Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Luke D Oman
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Feng Li
- Universities Space Research Association, Columbia, MD, USA
| | - Sean Davis
- NOAA Earth System Research Laboratory, Boulder, CO, USA
| | - Steven Pawson
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
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9
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Garfinkel CI, Gordon A, Oman LD, Li F, Davis S, Pawson S. Nonlinear response of tropical lower stratospheric temperature and water vapor to ENSO. ATMOSPHERIC CHEMISTRY AND PHYSICS 2018; 18:4597-4615. [PMID: 30008736 DOI: 10.5194/acp-2017-520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A series of simulations using the NASA Goddard Earth Observing System Chemistry-Climate Model are analyzed in order to assess interannual and sub-decadal variability in the tropical lower stratosphere over the past 35 years. The impact of El Niño-Southern Oscillation on temperature and water vapor in this region is nonlinear in boreal spring. While moderate El Niño events lead to cooling in this region, strong El Niño events lead to warming, even as the response of the large scale Brewer Dobson Circulation appears to scale nearly linearly with El Niño. This nonlinearity is shown to arise from the response in the Indo-West Pacific to El Niño: strong El Niño events lead to tropospheric warming extending into the tropical tropopause layer and up to the cold point in this region, where it allows for more water vapor to enter the stratosphere. The net effect is that both strong La Niña and strong El Niño events lead to enhanced entry water vapor and stratospheric moistening in boreal spring and early summer. These results lead to the following interpretation of the contribution of sea surface temperatures to the decline in water vapor from the late 1990s to the early 2000s: the very strong El Niño event in 1997/1998, followed by more than two consecutive years of La Niña, led to enhanced lower stratospheric water vapor. As this period ended in early 2001, entry water vapor concentrations declined. This effect accounts for approximately one-quarter of the observed drop.
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Affiliation(s)
- Chaim I Garfinkel
- The Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Amit Gordon
- The Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Luke D Oman
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Feng Li
- Universities Space Research Association, Columbia, MD, USA
| | - Sean Davis
- NOAA Earth System Research Laboratory, Boulder, CO, USA
| | - Steven Pawson
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
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10
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Detecting recovery of the stratospheric ozone layer. Nature 2018; 549:211-218. [PMID: 28905899 DOI: 10.1038/nature23681] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/31/2017] [Indexed: 11/09/2022]
Abstract
As a result of the 1987 Montreal Protocol and its amendments, the atmospheric loading of anthropogenic ozone-depleting substances is decreasing. Accordingly, the stratospheric ozone layer is expected to recover. However, short data records and atmospheric variability confound the search for early signs of recovery, and climate change is masking ozone recovery from ozone-depleting substances in some regions and will increasingly affect the extent of recovery. Here we discuss the nature and timescales of ozone recovery, and explore the extent to which it can be currently detected in different atmospheric regions.
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11
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Davis SM, Hegglin MI, Fujiwara M, Dragani R, Harada Y, Kobayashi C, Long C, Manney GL, Nash ER, Potter GL, Tegtmeier S, Wang T, Wargan K, Wright JS. Assessment of upper tropospheric and stratospheric water vapor and ozone in reanalyses as part of S-RIP. ATMOSPHERIC CHEMISTRY AND PHYSICS 2017; 17:12743-12778. [PMID: 32714380 PMCID: PMC7380091 DOI: 10.5194/acp-17-12743-2017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Reanalysis data sets are widely used to understand atmospheric processes and past variability, and are often used to stand in as "observations" for comparisons with climate model output. Because of the central role of water vapor (WV) and ozone (O3) in climate change, it is important to understand how accurately and consistently these species are represented in existing global reanalyses. In this paper, we present the results of WV and O3 intercomparisons that have been performed as part of the SPARC (Stratosphere-troposphere Processes and their Role in Climate) Reanalysis Intercomparison Project (S-RIP). The comparisons cover a range of timescales and evaluate both inter-reanalysis and observation-reanalysis differences. We also provide a systematic documentation of the treatment of WV and O3 in current reanalyses to aid future research and guide the interpretation of differences amongst reanalysis fields. The assimilation of total column ozone (TCO) observations in newer reanalyses results in realistic representations of TCO in reanalyses except when data coverage is lacking, such as during polar night. The vertical distribution of ozone is also relatively well represented in the stratosphere in reanalyses, particularly given the relatively weak constraints on ozone vertical structure provided by most assimilated observations and the simplistic representations of ozone photochemical processes in most of the reanalysis forecast models. However, significant biases in the vertical distribution of ozone are found in the upper troposphere and lower stratosphere in all reanalyses. In contrast to O3, reanalysis estimates of stratospheric WV are not directly constrained by assimilated data. Observations of atmospheric humidity are typically used only in the troposphere, below a specified vertical level at or near the tropopause. The fidelity of reanalysis stratospheric WV products is therefore mainly dependent on the reanalyses' representation of the physical drivers that influence stratospheric WV, such as temperatures in the tropical tropopause layer, methane oxidation, and the stratospheric overturning circulation. The lack of assimilated observations and known deficiencies in the representation of stratospheric transport in reanalyses result in much poorer agreement amongst observational and reanalysis estimates of stratospheric WV. Hence, stratospheric WV products from the current generation of reanalyses should generally not be used in scientific studies.
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Affiliation(s)
- Sean M. Davis
- Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, USA
- Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado at Boulder, Boulder, CO 80309, USA
| | | | - Masatomo Fujiwara
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Rossana Dragani
- European Centre for Medium-Range Weather Forecasts, Reading, RG2 9AX, UK
| | - Yayoi Harada
- Japan Meteorological Agency, Tokyo, 100-8122, Japan
| | - Chiaki Kobayashi
- Japan Meteorological Agency, Tokyo, 100-8122, Japan
- Climate Research Department, Meteorological Research Institute, JMA, Tsukuba, 305-0052, Japan
| | - Craig Long
- Climate Prediction Center, National Centers for Environmental Prediction, National Oceanic and Atmospheric Administration, College Park, MD 20740, USA
| | - Gloria L. Manney
- NorthWest Research Associates, Socorro, NM 87801, USA
- Department of Physics, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
| | - Eric R. Nash
- Science Systems and Applications, Inc., Lanham, Maryland 20706, USA
| | - Gerald L. Potter
- NASA Center for Climate Simulation, Code 606.2, NASA Goddard Space Flight Center, Greenbelt MD 20771, USA
| | - Susann Tegtmeier
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, 24105, Germany
| | - Tao Wang
- NASA Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA 91109, USA
| | - Krzysztof Wargan
- Science Systems and Applications, Inc., Lanham, Maryland 20706, USA
- Global Modeling and Assimilation Office, Code 610.1, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
| | - Jonathon S. Wright
- Department of Earth System Science, Tsinghua University, Beijing, 100084, China
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12
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Hubert D, Lambert JC, Verhoelst T, Granville J, Keppens A, Baray JL, Cortesi U, Degenstein DA, Froidevaux L, Godin-Beekmann S, Hoppel KW, Kyrölä E, Leblanc T, Lichtenberg G, McElroy CT, Murtagh D, Nakane H, Querel R, Russell JM, Salvador J, Smit HGJ, Stebel K, Steinbrecht W, Strawbridge KB, Stübi R, Swart DPJ, Taha G, Thompson AM, Urban J, van Gijsel JAE, von der Gathen P, Walker KA, Wolfram E, Zawodny JM. Ground-based assessment of the bias and long-term stability of fourteen limb and occultation ozone profile data records. ATMOSPHERIC MEASUREMENT TECHNIQUES 2016; 9:2497-2534. [PMID: 29743958 PMCID: PMC5937289 DOI: 10.5194/amtd-8-6661-2015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ozone profile records of a large number of limb and occultation satellite instruments are widely used to address several key questions in ozone research. Further progress in some domains depends on a more detailed understanding of these data sets, especially of their long-term stability and their mutual consistency. To this end, we made a systematic assessment of fourteen limb and occultation sounders that, together, provide more than three decades of global ozone profile measurements. In particular, we considered the latest operational Level-2 records by SAGE II, SAGE III, HALOE, UARS MLS, Aura MLS, POAM II, POAM III, OSIRIS, SMR, GOMOS, MIPAS, SCIAMACHY, ACE-FTS and MAESTRO. Central to our work is a consistent and robust analysis of the comparisons against the ground-based ozonesonde and stratospheric ozone lidar networks. It allowed us to investigate, from the troposphere up to the stratopause, the following main aspects of satellite data quality: long-term stability, overall bias, and short-term variability, together with their dependence on geophysical parameters and profile representation. In addition, it permitted us to quantify the overall consistency between the ozone profilers. Generally, we found that between 20-40 km the satellite ozone measurement biases are smaller than ±5 %, the short-term variabilities are less than 5-12% and the drifts are at most ±5% decade-1 (or even ±3 % decade-1 for a few records). The agreement with ground-based data degrades somewhat towards the stratopause and especially towards the tropopause where natural variability and low ozone abundances impede a more precise analysis. In part of the stratosphere a few records deviate from the preceding general conclusions; we identified biases of 10% and more (POAM II and SCIAMACHY), markedly higher single-profile variability (SMR and SCIAMACHY), and significant long-term drifts (SCIAMACHY, OSIRIS, HALOE, and possibly GOMOS and SMR as well). Furthermore, we reflected on the repercussions of our findings for the construction, analysis and interpretation of merged data records. Most notably, the discrepancies between several recent ozone profile trend assessments can be mostly explained by instrumental drift. This clearly demonstrates the need for systematic comprehensive multi-instrument comparison analyses.
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Affiliation(s)
- D. Hubert
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels,
Belgium
| | - J.-C. Lambert
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels,
Belgium
| | - T. Verhoelst
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels,
Belgium
| | - J. Granville
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels,
Belgium
| | - A. Keppens
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels,
Belgium
| | - J.-L. Baray
- Laboratoire de l’Atmosphère et des Cyclones
(Université de La Réunion, CNRS, Météo-France),
OSU-Réunion (Université de la Réunion, CNRS), La
Réunion, France
- Laboratoire de Météorologie Physique, Observatoire
de Physique du Globe de Clermont-Ferrand (Université Blaise Pascal, CNRS),
Clermont-Ferrand, France
| | - U. Cortesi
- Istituto di Fisica Applicata “Nello Carrara” del
Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
| | - D. A. Degenstein
- Institute of Space and Atmospheric Studies, University of
Saskatchewan, Saskatoon, SK, Canada
| | - L. Froidevaux
- Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA, USA
| | - S. Godin-Beekmann
- Laboratoire Atmosphère Milieux Observations Spatiales,
Université de Versailles Saint-Quentin en Yvelines, Centre National de la
Recherche Scientifique, Paris, France
| | | | - E. Kyrölä
- Finnish Meteorological Institute, Helsinki, Finland
| | - T. Leblanc
- Jet Propulsion Laboratory, California Institute of Technology,
Wrightwood, CA, USA
| | - G. Lichtenberg
- German Aerospace Center (DLR), Remote Sensing Technology Institute,
Oberpfaffenhofen, Germany
| | | | - D. Murtagh
- Department of Earth and Space Sciences, Chalmers University of
Technology, Göteborg, Sweden
| | - H. Nakane
- Kochi University of Technology, Kochi, Japan
- National Institute for Environmental Studies, Tsukuba, Ibaraki,
Japan
| | - R. Querel
- National Institute of Water and Atmospheric Research, Lauder, New
Zealand
| | - J. M. Russell
- Department of Atmospheric and Planetary Science, Hampton
University, VA, USA
| | - J. Salvador
- CEILAP-UNIDEF (MINDEF-CONICET), UMI-IFAECI-CNRS-3351, Villa
Martelli, Argentina
| | - H. G. J. Smit
- Research Centre Jülich, Institute for Energy and Climate
Research: Troposphere (IEK-8), Jülich, Germany
| | - K. Stebel
- Norwegian Air Research Institute (NILU), Kjeller, Norway
| | - W. Steinbrecht
- Meteorologisches Observatorium, Deutscher Wetterdienst,
Hohenpeissenberg, Germany
| | - K. B. Strawbridge
- Air Quality Processes Research Section, Environment Canada,
Toronto, ON, Canada
| | - R. Stübi
- Payerne Aerological Station, MeteoSwiss, Payerne, Switzerland
| | - D. P. J. Swart
- National Institute for Public Health and the Environment (RIVM),
Bilthoven, the Netherlands
| | - G. Taha
- Universities Space Research Association, Greenbelt, MD, USA
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | | | - J. Urban
- Department of Earth and Space Sciences, Chalmers University of
Technology, Göteborg, Sweden
| | | | - P. von der Gathen
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine
Research, Potsdam, Germany
| | - K. A. Walker
- Department of Physics, University of Toronto, Toronto, ON,
Canada
- Department of Chemistry, University of Waterloo, Waterloo, ON,
Canada
| | - E. Wolfram
- CEILAP-UNIDEF (MINDEF-CONICET), UMI-IFAECI-CNRS-3351, Villa
Martelli, Argentina
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13
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Hubert D, Lambert JC, Verhoelst T, Granville J, Keppens A, Baray JL, Cortesi U, Degenstein DA, Froidevaux L, Godin-Beekmann S, Hoppel KW, Kyrölä E, Leblanc T, Lichtenberg G, McElroy CT, Murtagh D, Nakane H, Querel R, Russell JM, Salvador J, Smit HGJ, Stebel K, Steinbrecht W, Strawbridge KB, Stübi R, Swart DPJ, Taha G, Thompson AM, Urban J, van Gijsel JAE, von der Gathen P, Walker KA, Wolfram E, Zawodny JM. Ground-based assessment of the bias and long-term stability of fourteen limb and occultation ozone profile data records. ATMOSPHERIC MEASUREMENT TECHNIQUES 2016; 9:2497-2534. [PMID: 29743958 DOI: 10.5194/amt-9-2497-2016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The ozone profile records of a large number of limb and occultation satellite instruments are widely used to address several key questions in ozone research. Further progress in some domains depends on a more detailed understanding of these data sets, especially of their long-term stability and their mutual consistency. To this end, we made a systematic assessment of fourteen limb and occultation sounders that, together, provide more than three decades of global ozone profile measurements. In particular, we considered the latest operational Level-2 records by SAGE II, SAGE III, HALOE, UARS MLS, Aura MLS, POAM II, POAM III, OSIRIS, SMR, GOMOS, MIPAS, SCIAMACHY, ACE-FTS and MAESTRO. Central to our work is a consistent and robust analysis of the comparisons against the ground-based ozonesonde and stratospheric ozone lidar networks. It allowed us to investigate, from the troposphere up to the stratopause, the following main aspects of satellite data quality: long-term stability, overall bias, and short-term variability, together with their dependence on geophysical parameters and profile representation. In addition, it permitted us to quantify the overall consistency between the ozone profilers. Generally, we found that between 20-40 km the satellite ozone measurement biases are smaller than ±5 %, the short-term variabilities are less than 5-12% and the drifts are at most ±5% decade-1 (or even ±3 % decade-1 for a few records). The agreement with ground-based data degrades somewhat towards the stratopause and especially towards the tropopause where natural variability and low ozone abundances impede a more precise analysis. In part of the stratosphere a few records deviate from the preceding general conclusions; we identified biases of 10% and more (POAM II and SCIAMACHY), markedly higher single-profile variability (SMR and SCIAMACHY), and significant long-term drifts (SCIAMACHY, OSIRIS, HALOE, and possibly GOMOS and SMR as well). Furthermore, we reflected on the repercussions of our findings for the construction, analysis and interpretation of merged data records. Most notably, the discrepancies between several recent ozone profile trend assessments can be mostly explained by instrumental drift. This clearly demonstrates the need for systematic comprehensive multi-instrument comparison analyses.
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Affiliation(s)
- D Hubert
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
| | - J-C Lambert
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
| | - T Verhoelst
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
| | - J Granville
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
| | - A Keppens
- Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
| | - J-L Baray
- Laboratoire de l'Atmosphère et des Cyclones (Université de La Réunion, CNRS, Météo-France), OSU-Réunion (Université de la Réunion, CNRS), La Réunion, France
- Laboratoire de Météorologie Physique, Observatoire de Physique du Globe de Clermont-Ferrand (Université Blaise Pascal, CNRS), Clermont-Ferrand, France
| | - U Cortesi
- Istituto di Fisica Applicata "Nello Carrara" del Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy
| | - D A Degenstein
- Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada
| | - L Froidevaux
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - S Godin-Beekmann
- Laboratoire Atmosphère Milieux Observations Spatiales, Université de Versailles Saint-Quentin en Yvelines, Centre National de la Recherche Scientifique, Paris, France
| | | | - E Kyrölä
- Finnish Meteorological Institute, Helsinki, Finland
| | - T Leblanc
- Jet Propulsion Laboratory, California Institute of Technology, Wrightwood, CA, USA
| | - G Lichtenberg
- German Aerospace Center (DLR), Remote Sensing Technology Institute, Oberpfaffenhofen, Germany
| | | | - D Murtagh
- Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden
| | - H Nakane
- Kochi University of Technology, Kochi, Japan
- National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan
| | - R Querel
- National Institute of Water and Atmospheric Research, Lauder, New Zealand
| | - J M Russell
- Department of Atmospheric and Planetary Science, Hampton University, VA, USA
| | - J Salvador
- CEILAP-UNIDEF (MINDEF-CONICET), UMI-IFAECI-CNRS-3351, Villa Martelli, Argentina
| | - H G J Smit
- Research Centre Jülich, Institute for Energy and Climate Research: Troposphere (IEK-8), Jülich, Germany
| | - K Stebel
- Norwegian Air Research Institute (NILU), Kjeller, Norway
| | - W Steinbrecht
- Meteorologisches Observatorium, Deutscher Wetterdienst, Hohenpeissenberg, Germany
| | - K B Strawbridge
- Air Quality Processes Research Section, Environment Canada, Toronto, ON, Canada
| | - R Stübi
- Payerne Aerological Station, MeteoSwiss, Payerne, Switzerland
| | - D P J Swart
- National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - G Taha
- Universities Space Research Association, Greenbelt, MD, USA
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - A M Thompson
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - J Urban
- Department of Earth and Space Sciences, Chalmers University of Technology, Göteborg, Sweden
| | - J A E van Gijsel
- Royal Netherlands Meteorological Institute (KNMI), De Bilt, the Netherlands
| | - P von der Gathen
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
| | - K A Walker
- Department of Physics, University of Toronto, Toronto, ON, Canada
- Department of Chemistry, University of Waterloo, Waterloo, ON, Canada
| | - E Wolfram
- CEILAP-UNIDEF (MINDEF-CONICET), UMI-IFAECI-CNRS-3351, Villa Martelli, Argentina
| | - J M Zawodny
- NASA Langley Research Center, Hampton, VA, USA
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