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TORs for WGSF:

TORs for WGSF:. to review the requirements of the different WCRP programmes for air-sea fluxes;. to develop communication and co-ordination between the research initiatives of WCRP and IGBP on air sea-fluxes;.

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TORs for WGSF:

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  1. TORs for WGSF: to review the requirements of the different WCRP programmes for air-sea fluxes; to develop communication and co-ordination between the research initiatives of WCRP and IGBP on air sea-fluxes; to encourage research and operational activities aimed at improving the knowledge of air-sea fluxes; to keep the scientific community and the JSC informed of progress achieved through regular reports, World Wide Web, and as necessary, scientific workshops.

  2. Proposed specific objectives of WGSF for the nearest perspective: ongoing compilation, evaluation and intercomparison of existing flux data sets, including those of biogeochemical fluxes; further improvement of parameterisations of physical and biogeochemical fluxes, quantification of uncertainties in surface flux products and development of metadata for these products; assessment of model sensitivity to and limits on predictability from errors associated with surface fluxes and development of objective analysis schemes and data assimilation techniques in support of the coupled system (re-) analysis; development of strategy for merging and combining surface flux data sets to meet the requirements of WCRP and IGBP; development of the requirements for flux and flux-related observations in co-operation with IGBP, GCOS, GOOS and other relevant activities; interaction with and support to SOLAS;

  3. Working Group Plans October 10, 2003 *Populate the Working Group *Open communications with WCRP ‘constituency’ Interested groups designate liaison *Establish links with SOLAS *Start a Website Handbook on best practices for flux measurements Selected flux parameterizations (codes) Selected flux data bases Links to other flux databases *Develop strategies/plans to meet our objectives development of the requirements for flux and flux-related observations in co-operation with IGBP, GCOS, GOOS and other relevant activities;

  4. Immediate Issues March 1, 2004 *Assembling the WG *Meeting with SOLAS Future joint symposium on flux parameterizations? *Project SEAFLUX (GEWEX) *Handbook on Flux Measurements Air-sea Air-Ice/snow

  5. WG Membership

  6. http://www.etl.noaa.gov/et6/wgsf/

  7. WG Meeting Halifax Oct 04 ftp://ftp.etl.noaa.gov/user/cfairall/wcrp_wgsf/meetings/halifax_04/ *Two days prior to SOLAS Scientific Meeting *Background Topics Briefings on WGSF, WCRP needs, COPES, GCOOS SOLAS Focus2 *Science/Structure Talks CLIVAR data/information sharing (Weller), ocean modeling & reanalysis (Barnier), satellite fluxes (Bentamy), flux variability (Gulev), metadata (Kent), SURFA (Weller), Precipitation (Bradley) *SOLAS Science talks: gas transfer, particles, field programs Symposium?

  8. WG Halifax Outcomes *SURFA Reside at PCMDI, Monthly averages, 4 Climate Ref Buoys VOSCLIM, Satellite Product, NWP grid around buoy *Symposium on particle/gas flux parameterizations Noted recent workshop on particles and SOLAS science symposium Review papers – particles (deLeeuw) and gas (McGillis) *Flux Handbook In situ methods VOS, R/V, buoy, towers Flux summer school? *Radiative flux improvements COADS-type use models not direct measurements Seagoing in situ not up to BSRN standards Contacted E. Dutton about ocean BSRN

  9. Flux Products *Whither WGSF? Question from Rossow SEAFLUX – FSU proposing to take over NESDIS/NCDC – Bates planning product *Types of products In situ Satellite NWP *Blended product Examples: Weller or Large Ocean reanalysis Optimal blending requires characterization errors, etc *GCM parameterization Spatial/temporal averages in situ versus GCM/NWP “Requested that WGSF develop a working dialogue with NWP and climate modellers to understand their needs and uses of surface flux measurements and how they relate to modelled surface fluxes.”

  10. Courtesy ChrisBretherton Comparison of ECMWF, NCEP, and SOC Latent hear flux climatologies

  11. + 64 buoys for 38 buoys for TAO buoy AnalysisChuanLi Jiang, Meghan F. Cronin, Kathryn A. Kelly, LuAnne Thompson

  12. State variables evaluation averaged over TAO buoys… QuikSCAT Hybrid ERA40 ERA40 MW/OI

  13. LHF evaluation averaged over TAO buoys: Fields NCEP1C NCEP2C ERA40C Hybrid Bias SDD Bias SDD Bias SDD Bias SDD LHF 10.7 24.8 -8.9 26.6 -1.5 18.1 -5.8 16.2 Fields NCEP1 NCEP2 ERA40 Bias SDD Bias SDD Bias SDD LHF -4.7 26.8 -28.6 32.0 -13.6 18.1 Algorithm tuned to observation COARE Improved LHF COARE Improved LHF Mean LHF bias is not sensitive to Difference=Algorithm + State variables + Temporal resolution of input variables

  14. LHF map comparison… Hybrid LHF Larger than NWPC Hybrid LHF is similar to NCEP1 off the equator

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