GAW Report No. 261 Sixth Session of the CAS Environmental Pollution and Atmospheric Chemistry Scientific Steering Committee Geneva, Switzerland 11-14 November 2019 WEATHER CLIMATE WATER CLIMATE WEATHER REPORT OF THE SIXTH SESSION OF THE CAS ENVIRONMENTAL POLLUTION AND ATMOSPHERIC CHEMISTRY SCIENTIFIC STEERING COMMITTEE EDITORIAL NOTE METEOTERM, the WMO terminology database, may be consulted at: http://www.wmo.int/pages/prog/lsp/meteoterm_wmo_en.html. Acronyms may also be found at: https://unterm.un.org/unterm/portal/welcome. © World Meteorological Organization, 2020 The right of publication in print, electronic and any other form and in any language is reserved by WMO. Short extracts from WMO publications may be reproduced without authorization, provided that the complete source is clearly indicated. 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The findings, interpretations and conclusions expressed in WMO publications with named authors are those of the authors alone and do not necessarily reflect those of WMO or its Members. This publication has been issued without formal editing. 2/80 REPORT OF THE SIXTH SESSION OF THE CAS ENVIRONMENTAL POLLUTION AND ATMOSPHERIC CHEMISTRY SCIENTIFIC STEERING COMMITTEE Table of Contents 1. WELCOME AND ADOPTION OF THE AGENDA ........................................... 5 2. UPDATE ON THE ACTION ITEMS .............................................................. 5 3. UPDATES ON THE IMPLEMENTATION OF THE GAW IMPLEMENTATION PLAN ....................................................................................................... 6 3.1 Scientific Advisory Group on Ozone and Solar UV Radiation (SAG Ozone-UV) ........................................................................................ 6 3.2 Scientific Advisory Group on Reactive Gases (SAG-RG) ................................... 7 3.3 Scientific Advisory Group on Greenhouse Gases (SAG GHG) ............................ 8 3.4 Scientific Advisory Group on Aerosol (SAG on Aerosol) ................................... 9 3.5 Scientific Advisory Group on Total Atmospheric Deposition (SAG-TAD) ........... 10 3.6 Scientific Advisory Group on Applications (SAG-Apps) .................................. 12 3.7 Scientific Advisory Group on GAW Urban Research Meteorology and Environment (SAG GURME) ......................................................................................... 12 3.8 Expert Team on World Data Centres (ET-WDC)............................................ 14 3.9 Task Team on Rolling Review of Requirements (TT-RRR) .............................. 15 4. GAW SCIENCE-FOR-SERVICES INITIATIVES ......................................... 15 4.1 Measurement Model Fusion for Global Total Atmospheric Deposition (MMF-GTAD) ........................................................................................... 15 4.2 Integrated Global Greenhouse Gas Information System (IG3IS) ..................... 16 4.3 Global Air Quality Forecasting and Information System (GAFIS)..................... 17 5. REFORM OF WMO CONSTITUENT BODIES ............................................. 18 5.1 Reform introduction ................................................................................. 18 5.2 New WMO technical commissions ............................................................... 18 5.3 WMO Research Board and its integration with the technical commissions ........................................................................ 19 6. COLLABORATIVE ACTIVITIES WITH THE OTHER BODIES ...................... 20 6.1 Update from the World Weather Research Programme (WWRP) ..................... 20 6.2 Updates from the World Climate Research Programme (WCRP) ..................... 21 3/80 REPORT OF THE SIXTH SESSION OF THE CAS ENVIRONMENTAL POLLUTION AND ATMOSPHERIC CHEMISTRY SCIENTIFIC STEERING COMMITTEE 6.3 Updates on the Working Group on Numerical Experimentation (WGNE) .......... 22 6.4 Updates on the Sand and Dust Storms Warning and Advisory and Assessment System (SDS-WAS) ................................................................................. 22 6.5 Updates on the International Global Atmospheric Chemistry (IGAC) Project .... 23 6.6 Updates on the international Commission on Atmospheric Chemistry and Global Pollution (iCACGP) ................................................................................... 24 6.7 Updates on the Interdisciplinary Biomass Burning Initiative (IBBI) ................. 24 6.8 Collaborative activities with the World Health Organization ........................... 25 6.9 Group of Experts on Scientific Aspects of Marine Environmental Protection (GESAMP) ............................................................................................... 26 7. ORGANIZATION OF GAW ACTIVITIES UNDER THE RESEARCH BOARD .. 26 7.1 GAW IP and alignment with the reform ....................................................... 26 7.2 Infrastructure-related activities in GAW ...................................................... 28 7.3 Service-related activities in GAW ............................................................... 29 7.4 Role of the Scientific Advisory Groups......................................................... 30 7.5 Vision for the future organization of GAW.................................................... 32 8. OUTREACH, CAPACITY DEVELOPMENT AND RESOURCE MOBILIZATION STRATEGY ............................................................................................. 33 9. SETTING UP PRIORITIES ...................................................................... 34 10. INTERNAL SSC BUSINESS ..................................................................... 34 Annex 1 AGENDA ................................................................................................. 35 Annex 2 LIST OF PARTICIPANTS ............................................................................ 38 Annex 3 ACTION ITEMS FROM THE PREVIOUS MEETING ........................................... 39 Annex 4 REVISION OF THE ACTION ITEMS FROM THE GAW IMPLEMENTATION PLAN FOR 2016-2023 .............................................................................................. 43 Annex 5 DECISIONS AND ACTION ITEMS OF THE SIXTH EPAC SSC SESSION .............. 50 Annex 6 (N)(RT) DATA SERVICES FROM GAW .......................................................... 53 Annex 7 SPECIFIC TERMS OF REFERENCE OF THE SUBSTRUCTURES UNDER EPAC SSC ............................................................................................... 64 4/80 REPORT OF THE SIXTH SESSION OF THE CAS ENVIRONMENTAL POLLUTION AND ATMOSPHERIC CHEMISTRY SCIENTIFIC STEERING COMMITTEE 1. WELCOME AND ADOPTION OF THE AGENDA The sixth session of the Commission for Atmospheric Sciences (CAS) Environmental Pollution and Atmospheric Chemistry Scientific Steering Committee (EPAC SSC) was held at the World Meteorological Organization (WMO) from 11 to 14 November 2019 in Geneva, Switzerland. Professor Gregory Carmichael, Chair of the EPAC SSC chaired the meeting. He introduced the agenda of the meeting (Annex 1). He explained that objectives of the meeting are to facilitate the evolution of the Global Atmosphere Watch (GAW) Programme and align its priorities and implementation with the new organization of WMO. Meeting participants introduced themselves through a tour-de-table (list of participants is provided in Annex 2). The Chair explained WMO goals and strategic objectives approved by the eighteenth World Meteorological Congress and highlighted the structure of WMO constituent bodies. He stressed that WMO focuses on a more comprehensive Earth system approach, with a stronger focus on water resources and the ocean, more coordinated climate activities and a more concerted effort to translate science into services for society. He reminded the meeting about the need for seamless provisions of Earth system modelling across spatial and time scales and across weather, water, environment, ocean and climate. He explained that the Organization is undergoing a reform process. The GAW Programme is under the responsibility of the Research Board and should focus on WMO strategic objective three to advance fundamental knowledge of the Earth system and policy-relevant science. The connections between the science and the services through the value chain approach (including new technical commissions (TCs) of science and expert teams) should be strengthened. Co-benefits of the environment research and weather, water and climate research should be further investigated and exploited. The Chair further stressed that the steering bodies within GAW should think about the opportunities that become open with the WMO reform. It would be important to better integrate and reorganize