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WGNE – GEWEX SURFA Project D. Majewski (DWD) and Huai-min Zhang (NCDC)

Deutscher Wetterdienst. WGNE – GEWEX SURFA Project D. Majewski (DWD) and Huai-min Zhang (NCDC). About SURFA List of model variables Activities and persons involved Progress Sea Surface and Land Surface Open questions and outlook. About SURFA (Surface Flux Analysis).

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WGNE – GEWEX SURFA Project D. Majewski (DWD) and Huai-min Zhang (NCDC)

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  1. WGNE Shanghai October 2007 Deutscher Wetterdienst WGNE – GEWEX SURFA ProjectD. Majewski (DWD) and Huai-min Zhang (NCDC) • About SURFA • List of model variables • Activities and persons involved • Progress Sea Surface and Land Surface • Open questions and outlook

  2. WGNE Shanghai October 2007 About SURFA (Surface Flux Analysis) • Driver: Surface processes are key in improving NWP & climate model forecast skills • Objective: SURFA is to institutionalize the evaluation of near real-time NWP (& Climate Model & Reanalysis) fluxes and related fields with high quality reference data • Interested Groups: WCRP WGSF, WGNE, GEWEX …

  3. WGNE Shanghai October 2007 List of model variables • Global forecast fields on regular latitude – longitude grid • Resolution 0.25° x 0.25° • Initial date: 12 UTC • Forecast ranges: +12h to +36h, 3-hourly • Two constant fields: ORO, LSM • 16 instantaneous variables: e.g. PS, ALBEDO, SEAICE, U_10M, … • 13 accumulated variables: e.g. LS_PREC, CO_PREC, SO_NET, … • 3 optional variables: TH_DO_CS, SO_DO_CS, PBL_DEPTH

  4. WGNE Shanghai October 2007 Activities and persons involved • Oct. 06: Detlev Majewski (DWD) as WGNE Representative for SURFA • Dec. 06: First draft of list of variables sent to Martin Miller (ECMWF) and Chris Fairall (NOAA) • Jan. 07: List of variables sent to all global centres; ECMWF and NCEP should provide first test data sets to NCDC • Mar. 07: ECMWF nearly ready to send test data set to Huai-min Zhang • Jun. 07: Daily data transfer from ECMWF to NCDC • Jul. 07: ECMWF data are now available through OPeNDAP/TDS • Jan 08: Daily data transfer from German DWD to NCDC

  5. WGNE Shanghai October 2007 SURFA – Surface Flux AnalysisProgress – Sea Surface • Documents: NWP archive specifications; Submission Agreements (drafted) • Ingest of ECMWF & DWD NWP SURFA into NCDC • Ingest of some OceanSITES data into NCDC • Data available from NCDC by ftp & OPeNDAP (ftp://eclipse.ncdc.noaa.gov/raid1b/surfa http://nomads.ncdc.noaa.gov:8085/thredds/catalogServices?catalog=http://nomads.ncdc.noaa.gov:8085/thredds/surfa.xml) • Submission Agreements (drafted)

  6. WGNE Shanghai October 2007 SURFA – Surface Flux AnalysisProgress – Land Surface (1) • Joint NCDC & ORNL Effort (Pinheiro et al; focus on satellite evaluations but equally applicable to NWP model evaluations) • ORNL (Oak Ridge National Lab.) is the DAAC for FLUXNET Project • NCDC – NOAA’s official archive site for satellite and model products • Web-service oriented evaluation • Data downloads in multiple formats • Proto-type has been developed

  7. WGNE Shanghai October 2007 SURFA – Surface Flux AnalysisProgress – Land Surface (2)

  8. WGNE Shanghai October 2007 Open questions and outlook • Forecast range 12h to 36h (to avoid spin up phase)? • Timing the participation of other global NWP centres?

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