Tropospheric Ozone Assessment Report: Present-day distribution and trends of tropospheric ozone relevant to climate and global atmospheric chemistry model evaluation - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Elementa: Science of the Anthropocene Year : 2018

Tropospheric Ozone Assessment Report: Present-day distribution and trends of tropospheric ozone relevant to climate and global atmospheric chemistry model evaluation

1 CIRES - Cooperative Institute for Research in Environmental Sciences
2 TROPO - LATMOS
3 LAERO - Laboratoire d'aérologie
4 IUP - Institute of Environmental Physics [Bremen]
5 Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique
6 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
7 IARC - Izaña Atmospheric Research Center
8 LPCA - Laboratoire de Physico-Chimie de l'Atmosphère
9 JPL - Jet Propulsion Laboratory
10 RSLab - Remote Sensing Laboratory [Barcelona]
11 ACOML - Atmospheric Chemistry Observations and Modeling Laboratory
12 IMK-ASF - Institut für Meteorologie und Klimaforschung - Atmosphärische Spurengase und Fernerkundung
13 CfA - Harvard-Smithsonian Center for Astrophysics
14 IPA - DLR Institut für Physik der Atmosphäre
15 Department of Atmospheric Sciences [Seattle]
16 STEM - School of Science, Technology, Engineering and Mathematics [Bothell]
17 CAC - Centre for Atmospheric Chemistry [Wollongong]
18 Research Centre for Atmospheric Physics and Climatology [Athens]
19 RAL Space - Space Science and Technology Department [Didcot]
20 BAER - Bay Area Environmental Research Institute
21 CMA - China Meteorological Administration
22 School of Atmospheric Sciences [Nanjing]
23 Department of Geography and Planning [University of Toronto]
24 Institut d'Astrophysique et de Géophysique [Liège]
25 CIMMS - Cooperative Institute for Mesoscale Meteorological Studies
26 OU - University of Oklahoma
27 NSSL - National Severe Storms Laboratory
28 ESRL - NOAA Earth System Research Laboratory
29 NIWA - National Institute of Water and Atmospheric Research [Lauder]
30 IEK-8 - Institut für Energie- und Klimaforschung - Troposphäre
31 JSC - Jülich Supercomputing Centre
32 ASRC - Atmospheric Sciences Research Center
33 RAL - STFC Rutherford Appleton Laboratory
34 EMPA - Swiss Federal Laboratories for Materials Science and Technology [Dübendorf]
35 NIES - National Institute for Environmental Studies
36 Environment and Climate Change Canada
37 GSFC - NASA Goddard Space Flight Center
38 IMK-IFU - Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung
39 NCAR - National Center for Atmospheric Research [Boulder]
40 BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique
41 Morgan State University
Gérard Ancellet
  • Function : Author
  • PersonId : 915258
Brice Barret
Anne Boynard
  • Function : Author
  • PersonId : 938803
Cathy Clerbaux
J. Neu
  • Function : Author
Hervé Petetin

Abstract

The Tropospheric Ozone Assessment Report (TOAR) is an activity of the International Global Atmospheric Chemistry Project. This paper is a component of the report, focusing on the present-day distribution and trends of tropospheric ozone relevant to climate and global atmospheric chemistry model evaluation. Utilizing the TOAR surface ozone database, several figures present the global distribution and trends of daytime average ozone at 2702 non-urban monitoring sites, highlighting the regions and seasons of the world with the greatest ozone levels. Similarly, ozonesonde and commercial aircraft observations reveal ozone’s distribution throughout the depth of the free troposphere. Long-term surface observations are limited in their global spatial coverage, but data from remote locations indicate that ozone in the 21st century is greater than during the 1970s and 1980s. While some remote sites and many sites in the heavily polluted regions of East Asia show ozone increases since 2000, many others show decreases and there is no clear global pattern for surface ozone changes since 2000. Two new satellite products provide detailed views of ozone in the lower troposphere across East Asia and Europe, revealing the full spatial extent of the spring and summer ozone enhancements across eastern China that cannot be assessed from limited surface observations. Sufficient data are now available (ozonesondes, satellite, aircraft) across the tropics from South America eastwards to the western Pacific Ocean, to indicate a likely tropospheric column ozone increase since the 1990s. The 2014–2016 mean tropospheric ozone burden (TOB) between 60˚N–60˚S from five satellite products is 300 Tg ± 4%. While this agreement is excellent, the products differ in their quantification of TOB trends and further work is required to reconcile the differences. Satellites can now estimate ozone’s global long-wave radiative effect, but evaluation is difficult due to limited in situ observations where the radiative effect is greatest.
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Dates and versions

insu-01799693 , version 1 (27-11-2019)

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Audrey Gaudel, R. Cooper, Gérard Ancellet, Brice Barret, Anne Boynard, et al.. Tropospheric Ozone Assessment Report: Present-day distribution and trends of tropospheric ozone relevant to climate and global atmospheric chemistry model evaluation. Elementa: Science of the Anthropocene, 2018, 6 (1), pp.art: 39. ⟨10.1525/elementa.291⟩. ⟨insu-01799693⟩
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