Tropospheric Ozone Assessment Report, Phase III

Co-Chairs:

Dr. Rodrigo J. Seguel
Faculty of Chemistry, Institute for Sustainable Development, Pontifical Catholic University of Chile
Santiago, Chile
rodrigo.seguel @ uc.cl 

Dr. Sophie Szopa
Laboratoire des Sciences du Climat et de l'Environnement
Gif-sur-Yvette, France
sophie.szopa @ lsce.ipsl.fr

 

 

Committee

  • Rodrigo J. Seguel (co-Chair), UC Chile, Santiago, Chile, rodrigo.seguel @ uc.cl
  • Sophie Szopa (co-Chair), Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette, France, sophie.szopa @ lsce.ipsl.fr
  • Keding Lu, College of Environmental Sciences and Engineering, Peking University, China,  lukeding @ pku.edu.cn
  • Gabriele Pfister, National Center for Atmospheric Research, Boulder, USA, pfister @ ucar.edu
  • Jason West, Department of Environmental Sciences and Engineering University of North Carolina, USA, jjwest @ email.unc.edu
  • Daan Hubert, Royal Belgian Institute for Space Aeronomy, Brussel, Belgium, daan.hubert @ aeronomie.be
  • Hwajin Kim, Seoul National University, Seoul, South Korea, khj0116 @ snu.ac.kr
  • Kazuyuki Miyazaki, Jet Propulsion Laboratory, Pasadena, CA, USA, kazuyuki.miyazaki @ jpl.nasa.gov
  • Vaishali Naik, NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA, vaishali.naik @ noaa.gov
  • Anke Nölscher, Forschungszentrum Jülich GmbH, Jülich, Germany, a.noelscher @ fz-juelich.de
  • Joanna Struzewska, Institute of Environment Protection—National Research Institute, Warsaw, Poland, joanna.struzewska @ ios.edu.pl
  • Ex-officio member - TOAR database : Sabine Schröder, Forschungszentrum Jülich GmbH, Jülich, Germany, s.schroeder @ fz-juelich.de

Latest News:

TOAR-II Theme Issue is now published in Philosophical Transactions A, presenting the main scientific outcomes of Phase II (TOAR-II) of the Tropospheric Ozone Assessment Report (TOAR).

The Theme Issue provides an updated assessment of the global distribution, trends and impacts of tropospheric ozone, covering its effects on human health and vegetation, its role in climate change, and ozone variability from the surface to the upper atmosphere. It also includes regional assessments and an overview of developments in observations and modelling.

The issue consists of eight peer-reviewed papers, including a comprehensive overview of the TOAR-II assessment and seven papers focusing on specific aspects of global tropospheric ozone.

 Read the full TOAR-II Theme Issue in Philosophical Transactions A here: https://royalsocietypublishing.org/rsta/issue/384/2332 

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Get Involved

TOAR-III has been officially launched in Heraklion in September 2026, during the 2026 IGAC conference, with a Quickstart meeting to invite the community to think about the future TOAR-III Working Groups. More information to come. An online meeting to explain how and when to propose WG for TOAR-III were organised the 2nd of November 2026 to introduce the next phase of the TOAR-III, outline the planned activities and timeline, and provide an opportunity to learn how to contribute to this international community effort. If you were not able to attend any of these meetings, you are still fully welcome to participate to TOAR-III.

Document to help identifying WG under construction and people willing to participate to TOAR-III (the document just gathers ideas, don't be shy, even if you're idea is not mature)


Calendar for the WG submission phase:

  • Deadline for the 1st round of WG submission for the application following the guidance and application procedures (see below) - 1st of February
  • Kickoff in May 20-21 2027, Jeju Island, South Korea
  • 2nd round of WG submission - by 1st of July 2027

Possible Structure for the final Assessment v0

To join the TOAR-III email list, sign-up here


Governance and Procedural Documents

TOAR-III Steering Committee Terms of Reference

TOAR-III Scope and Roadmap for Working Groups and Publications

TOAR-III Guidelines for Working Groups

TOAR-III Working Group application procedure