WORLD METEOROLOGICAL ORGANIZATION GLOBAL ATMOSPHERE WATCH No. 165 REPORT of the CAS WORKING GROUP on ENVIRONMENTAL POLLUTION and ATMOSPHERIC CHEMISTRY AND The GAW 2005 WORKSHOP (Geneva, Switzerland, 14-18 March 2005) 2005 WORLD METEOROLOGICAL ORGANIZATION GLOBAL ATMOSPHERE WATCH No. 165 REPORT of the CAS WORKING GROUP on ENVIRONMENTAL POLLUTION and ATMOSPHERIC CHEMISTRY AND The GAW 2005 WORKSHOP (Geneva, Switzerland, 14-18 March 2005) WMO TD No. 1302 Table of Contents PART I - REPORT of the CAS WORKING GROUP on ENVIRONMENTAL POLLUTION and ATMOSPHERIC CHEMISTRY 1. Opening of the Meeting ...........................................................................................................................3 2. Approval of the Agenda...........................................................................................................................3 3. Overview of GAW 2005 ............................................................................................................................3 4. Status of GAW Observing Systems and GURME..................................................................................3 4.1 GURME .........................................................................................................................................3 4.2 Ozone ............................................................................................................................................4 4.3 UV ..................................................................................................................................................4 4.4 Greenhouse gases ........................................................................................................................4 4.5 Reactive gases..............................................................................................................................4 4.6 Atmospheric deposition .................................................................................................................4 4.7 Aerosols.........................................................................................................................................4 4.8 Transport and deposition including modelling...............................................................................5 5. IPY and GAW.............................................................................................................................................5 6. IGACO .......................................................................................................................................................5 7. Communications ......................................................................................................................................5 8. Capacity Building .....................................................................................................................................5 9. Review Actions from CgXIV and EC LV and LVI...................................................................................6 10. Progress on the GAW Strategic Plan (2001-2007) and Preparation of the Next Plan .......................6 11. Chairman’s Summary of the Main Conclusions of the Meeting ..........................................................6 11.1 The main driving forces for GAW now and over the next years....................................................6 11.2 Methods needed to cross-over......................................................................................................6 11.3 GAW challenges............................................................................................................................7 11.4 Consequences for new GAW strategic plan..................................................................................7 12. Conclusions, Recommendations and Actions of the Meeting ............................................................8 12.1 General..........................................................................................................................................8 12.2 Ozone ............................................................................................................................................8 12.3 UV..................................................................................................................................................8 12.4 Greenhouse gases ........................................................................................................................8 12.5 Reactive gases..............................................................................................................................9 12.6 Atmospheric deposition .................................................................................................................9 12.7 Aerosols.........................................................................................................................................9 12.8 GURME .........................................................................................................................................10 12.9 Transport and deposition including modelling...............................................................................10 12.10 IPY .................................................................................................................................................10 12.11 GAW and current environmental challenges.................................................................................10 12.12 WRDC............................................................................................................................................10 12.13 IGACO ...........................................................................................................................................10 12.14 Communications............................................................................................................................10 12.15 Capacity building ...........................................................................................................................10 13. Review of CG XIV and EC ........................................................................................................................10 14. GAW Strategic Plan (GSP).......................................................................................................................11 15. Closing of the Meeting.............................................................................................................................11 ANNEX A: List of Participants ......................................................................................................................13 ANNEX B: Agenda..........................................................................................................................................15 ANNEX C: Transport and Deposition Including Modelling (Yu. Tsaturov) ..................................................17 i PART II - GAW 2005 WORKSHOP PROCEEDINGS 1. Working Group Recommendations .......................................................................................................21 1.1 GAW Ozone & UV Observational System Development.................................................................21 1.2 Links of GAW Observations to Modelling: Real-time Data Delivery, Assimilation-Reanalysis and Other User Applications ............................................................................................................21 1.3 The Role of the World Radiation Data Centre (WRDC) in GAW, the Baseline Surface Radiation Network (BSRN) and Activities of the ICSU International Radiation Commission ..........................22 1.4 A Strategy for a GAW Global Aerosol Speciation Project (GASP) ..................................................22 1.5 GAW Approach to Reactive Gases: CO, VOCs, NOy, SO2, Surface O3 .........................................23 1.6 GAW GHG Calibration and Transfer of Standards of GAW Measurements ...................................24 1.7 Strengthening Links of GAW to Partners .........................................................................................25 2. Workshop Presentation Summaries ......................................................................................................29 Ozone Radiosonde Measurements, Nairobi, Kenya (B. Calpini et al.) ...................................................................31 A Very Deep Ozone Minihole in the Northern Hemisphere Stratosphere at Mid-latitude during the Winter of 2000 (N. Semane)..................................................................................................................34 Current Environmental Challenges Related to Atmospheric Chemistry and GAW (O. Hov).................................35 The WMO Global Atmosphere Watch (GAW) Programme within the Framework of Integrated Global Atmospheric Chemistry Observations (IGACO) (L. Barrie) .........................................................................37 Activities of the SAG Aerosol (U. Baltensperger) ....................................................................................................44 SAG GHG Report, Carbon Cycle Central Calibration Laboratories Maintained at NOAA, and NOAA- Sponsored Intercomparison Experiments (E. Dlugokencky) ........................................................................46 WMO/GAW Scientific Advisory Group for Ozone: Main Activities in 2001-2004 (K. Vanicek)...............................47