GEWEX 1988  SPARC 1992  WOCE CLIVAR 1995  TOGA WGNE WGCM WGSF ACSYS/CliC 1994–2003/2000  SOLAS >

Recent and Expected Deliverables SPARC reference climatology (done) SPARC Aerosol Assessment Review paper on the “Annular Modes” Report on Chemistry-Climate Instituted new PSC assessment for next WMO ozone assessment Instituted group on GWP of HFC-134a for IPCC SPARC 1992 

Stratospheric Chemistry and Climate Stratosphere- Troposphere coupling Detection, Attribution & Prediction of Stratospheric Changes Model Development Process Studies Data SPARC’s New Themes

Workshop on “Process-oriented validation of coupled-chemistry climate models” Grainau / Garmisch-Partenkirchen, Germany, November 2003 Conveners: V. Eyring, N.R.P. Harris, M. Rex, T.G. Shepherd Motivation CCMs have different levels of complexity, produce a wide range of results concerning timing and extent of ozone recovery and the overall confidence of ozone predictions is currently hard to assess Scope  Develop a standard for process-oriented model validation with a focus on the model’s ability to predict future ozone Outcome  A table of core processes for stratospheric CCMs within 4 categories Dynamics, Chemistry & Microphysics, Radiation, and Transport For each process, the table includes model diagnostics, variables relevant to apply the diagnostic in CCMs, sources of observational data, references, contacts and links Desires  CCM groups apply diagnostics in a step-wise approach over the next years  Broad support from atmospheric science community and programme managers Way ahead  SPARC working group on CCM validation: progress can be made in time for next WMO-UNEP and IPCC assessments  Development of diagnostic software packages Benefit  Overall confidence in CCMs will increase

SPARC General Assembly 1-6 August 2004 Victoria, Canada

ftp://atmos.sparc.sunysb.edu Directory: /pub/sparc

New Satellite Launches Version 2 C1 and C2 ISCCP (Clouds) SRB (Radiation) GVAP (Water Vapour) ISCCP 2 D1 and DX GVAP NVAP ISLSCP (Land-Surface) Version 2 Version 1.1 *Hatched lines represent planned data sets Initiative IIInitiative I GACP (Aerosols) III GPCP (Precipitation ) TRMM TERRA ENVISAT AQUA ADEOSII Global data sets

HOWEVER, TRENDS DERIVED FROM GEWEX SATELLITE CLOUD PRODUCTS INDICATE THAT CLOUD COVER MAY HAVE BEEN DECREASING DURING THE SAME PERIOD. WHAT INFLUENCES HAVE THESE POSSIBLE DECREASES IN CLOUD COVER HAD ON THE RECENT TRENDS IN TEMPERATURE? The same for water vapour? MODELS PROJECT TEMPERATURE INCREASES ASSOCIATED WITH CO2 INCREASES. OBSERVATIONS INDICATE WARMER TEMPERATURES ARE OCCURING.

GPCP: No evidence for a significant global trend over last 20 years But regional trends exist Curtis/Adler/Huffman 912

CEOP Implementation Underway Timing of new satellites & GEWEX/CLIVAR campaigns provides opportunity for significant benefit from a more coordinated observation period. Monsoon Experiment in South America (MESA) North American Monsoon Experiment (NAME) (MDB) Coordinated Enhanced Observing Period

The First Global Integrated Data Sets of the Water Cycle

WCRP: SPARC: Climate – chemistry model intercomparison workshop: SPARC data centre: ftp server: atmos.sparc.sunysb.edu, directory /pub/sparc SPARC General Assembly: sparc.seos.uvic.ca GEWEX: