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The NASA/GEWEX Surface Radiation Budget Project: Overview

The NASA/GEWEX Surface Radiation Budget Project: Overview. 22 nd GEWEX Radiation Panel Meeting Tokyo, Japan August 30 - September 1, 2011. Paul W. Stackhouse, Jr. – NASA LaRC Shashi K. Gupta, Stephen J. Cox, J. Colleen Mikovitz , Taiping Zhang SSAI and Laura Hinkelman U. Wash.

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The NASA/GEWEX Surface Radiation Budget Project: Overview

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  1. The NASA/GEWEX Surface Radiation Budget Project: Overview 22nd GEWEX Radiation Panel Meeting Tokyo, Japan August30- September 1, 2011 Paul W. Stackhouse, Jr. – NASA LaRC Shashi K. Gupta, Stephen J. Cox, J. Colleen Mikovitz, TaipingZhang SSAI and Laura Hinkelman U. Wash 22th GEWEX GRP Meeting

  2. SRB Web Site http://gewex-srb.larc.nasa.gov 22th GEWEX GRP Meeting

  3. SRB Data Products(Spatial Resolution: 1ox 1o) Note: The SW QC and LW QC algorithms are also used in CERES Surface-Only 22th GEWEX GRP Meeting

  4. Availability SRB Data Products(Spatial Resolution: 1o x 1o) 22th GEWEX GRP Meeting

  5. SRB Enhanced Web Site http://gewex-srb.larc.nasa.gov 22th GEWEX GRP Meeting

  6. SRB Data Availability • Atmospheric Science Data Center (main archive): • All products available • Binary format readable with Fortran read routines • Working towards .netCDF for all products • Web site: • http://eosweb.larc.nasa.gov/PRODOCS/srb/table_srb.html • My NASA Data Live Access Server • Only monthly products available (uses .netCDF) • Interactive subsetting/plotting possible • Web site: • http://mynasadata.larc.nasa.gov • NCDC THREDDS Server • Only older monthly version currently available • Working to replace ASAP • Web site: • http://www.ncdc.noaa.gov/oa/rsad/netcdf-access/index.php?name=srb 22th GEWEX GRP Meeting

  7. Activity Summary • Release 3: • Improved documentation for web/data center • Analysis and validation • SRB paper to be submitted Sept • GEWEX RFA • Continued writing/editing of document (more details in separate presentation) • Release 4: • Ancillary maps • New cloud properties • LW & SW RT improvements 22th GEWEX GRP Meeting

  8. 22th GEWEX GRP Meeting

  9. SRB Validation Aug. 30 - Sep 1, 2011

  10. Global Surface Multi-Year Averages S0= 1365 Wm-2 for Trenberth et al. results, 1361 Wm-2 for CERES Synoptic results, and 1367 Wm-2 for the other two sets. 22th GEWEX GRP Meeting

  11. Global Surface LW Comparisons Stephens et al (2011, accepted J.Clim) • Addresses uncertainties in LW Global Averaged Dowward Surface Fluxes • Conclude Global LW Downward Fluxes with Active profiling: • 345-350 Wm-2, • +/- 10 Wm-2 • Uncertainties related to T, Q in clear-sky 22th GEWEX GRP Meeting

  12. Global TOA Multi-Year Averages S0= 1365 Wm-2 for Trenberth et al. results, 1361 Wm-2 for CERES Synoptic results, and 1367 Wm-2 for the other two sets. 22th GEWEX GRP Meeting

  13. SRB Version 4.0 Progress & Plans • Key Input Requirements • ISCCP Radiance/Cloud, T/Q, ancillary • Examples • Proposed Output Parameters • Schedule for Testing & Production 22th GEWEX GRP Meeting

  14. SRB Input Requirements 22th GEWEX GRP Meeting

  15. Sample HGG 22th GEWEX GRP Meeting

  16. Sample HXS

  17. Examples: Old & New ISCCP

  18. Examples: Old & New ISCCP

  19. SRB Input Requirements 22th GEWEX GRP Meeting

  20. 22th GEWEX GRP Meeting

  21. 22th GEWEX GRP Meeting

  22. SRB Release 4 Data Products(Spatial Resolution: 1o x 1o and 0.5o x 0.5o) Note: Potential new parameters in red 22th GEWEX GRP Meeting

  23. SRB Release 4 Production Schedule • Sep – Dec 2011: • Meteorological Data sets: • Write codes to read & process new ISCCP T/Q/Tskin data set (from NCDC HIRS Analysis) • Evaluate against Reanalysis (MERRA, ERA) • Compare diurnal cycles against NCDC surface measurement • ISCCP Radiance and Cloud data sets • Read evaluate both HXS (and/or HXG) and HGG • Compare old and new radiance/cloud fields • Jan – Mar 2012: • Baseline Run: • Run Release 3 algorithms with new inputs for selected years • Compare and assess differences between Release 4 Baseline, Release 3.0 data sets and BSRN/CERES • Complete implementation improvements to algorithms & repeat test runs => compare to Rel 4 baseline 22th GEWEX GRP Meeting

  24. SRB Release 4 Production Schedule • Apr – Aug 2012: • 1x1 Degree • Begin full-scale production at 1x1 degree • Evaluate surface fluxes against Release 3, 4B and BSRN • Evaluate TOA fluxes against CERES • 0.5 x 0.5 Degree • Begin production for 1998 forward • Compare to coarse resolution version • July 2012 – Oct 2012 • Archive new data sets • Provide browse and other viewing/subsetting access via web applications • Documentation 22th GEWEX GRP Meeting

  25. GEWEX SRB: Summary Status • GEWEX SRBRel 3: 24 year climatology TOA and surface radiation at 1ox1o. • Documentation improved; paper submission in the next month • Validation, analysis and collaborative activities crucial to assessing and improving the data set are continuing • GEWEX RFA report remains key focus (presentation tomorrow) • GEWEX SRB Rel 4: • Input data improvements for: ISCCP “H”, met. inputs, aerosols and surface characteristics in collaboration w/ ISCCP Team • Algorithm improvements: ADM’s, RT updates, time and space averaging to be pursued in collaboration w/ ISCCP Team, Umd, and CERES teams • Goal: reprocess SRB in entirety startingApril 2012 following ISCCP reprocessing and algorithm improvements. • Funding Continued Via Proposal (due Sept.) 22th GEWEX GRP Meeting

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