GEWEX-RFA Data Set Description Before attempting to submit data, please read "How to Participate" (http://eosweb.larc.nasa.gov/GEWEX-RFA/documents/how_to_participate.html) and the "File Convention" document (http://eosweb.larc.nasa.gov/GEWEX-RFA/documents/data_format.html) for detailed instructions on the data submission process. Please maintain a copy of this form for each data product (defined by _ as in the "File Conventions" document) you submit to GEWEX-RFA, and submit an updated copy of the file with EACH upload. This file will serve as the documentation for the entire data product within the assessment effort. ------------------------------------------------------------------------ Project Title: GEWEX-RFA ------------------------------------------------------------------------ Data product name: ISCCP-FD_Ed000 1) Contact for scientific questions about data Name: Yuanchong Zhang Address: 2880 Broadway, RM 320-B, New York, NY 10025 Telephone: 212-678-5514 E-mail address: yzhang@giss.nasa.gov URL: http://isccp.giss.nasa.gov/projects/fc_announ.html 2) What is the name of the original archived data set from which this GEWEX-RFA subset was produced? ISCCP-FD 3) Is the original archived data set currently available from another data center or web site? No. If so, please list addresses or URLs: 4) Brief data description: A reference or URL for the complete original archived data set documentation, followed by a brief summary of features of particular relevance to the RFA submission (such as gap filling method), is the preferred approach. (Items of interest: input data streams, name of algorithm used to produce data, start and end time of data, gaps in spatial or temporal coverage, and data quality issues, etc.). Main reference: Zhang, Y-C., W. B. Rossow, A. A. Lacis, V. Oinas, and M. I. Mishchenko (2004), Calculation of radiative fluxes from the surface to top of atmosphere based on ISCCP and other global data sets: Refinements of the radiative transfer model and the input data, J. Geophys. Res., 109, D19105, doi:10.1029/2003JD004457. URL: http://isccp.giss.nasa.gov/projects/fc_announ.html Brief summary: ISCCP-FD (Version 0) is a 20.5-year (with continuous coverage for July 1983 - December 2003) fully-global radiative flux data product. It is created by employing the NASA GISS climate GCM radiative transfer code and a collection of global datasets describing the properties of the clouds and the surface every 3 hours (ISCCP), daily atmospheric profiles of temperature and humidity (NOAA TOVS), daily ozone abundances (TOMS), a climatology of cloud vertical layer distributions from rawinsonde humidity profiles (Wang et al. 2000), a climatology of cloud particle sizes (Han et al. 1994, 1999), a climatology of stratospheric aerosol and water vapor (SAGE-II), a climatology of the diurnal variations of near-surface air temperature (surface weather observations and NCEP-1 re-analysis), a climatology of tropospheric aerosols (NASA GISS climate model), and the spectral dependence of land surface albedo and emissivity by land-cover type (NASA GISS climate model). The results include the all-sky and clear-sky, upwelling and downwelling, total shortwave (SW = 0.2 - 5 micron wavelength) and total longwave (LW = 5 - 200 micron wavelength) radiative fluxes at five levels: surface, 680 mb, 440 mb, 100 mb and top-of-atmosphere (TOA). All of these results are originally reported with a resolution of 3 hours and 280 km (equal-area map equivalent to 2.5 latitude-longitude at the equator) in four data products: (1) TOA Radiative Fluxes, (2) Surface Radiative Fluxes, (3) Radiative flux profiles including TOA and SRF fluxes and (4) the complete input data collection. The first three products include a summary of the most relevant input physical parameters, whereas the fourth product contains the exact inputs used to calculate all the fluxes. The estimated uncertainties are 5-10 and 10-15 W/m^2 for TOA and surface fluxes, respectively (for regional, monthly mean flux values, see Zhang et al., 2004). The datasets to be uploaded to GEWEX-RFA are all global, monthly means of the 258 months, covering the said period. The parameters included are upward, downward and net SW and LW fluxes, total (SW+LW) net fluxes and (SW) albedo for both all- and clear-sky scenes at TOA and surface/ground (a total of 30 parameters, 14 for TOA and 16 for ground). 5) History of updates and changes. If you resubmit a new version of any part of this data product to GEWEX-RFA, please use this space to record the reasons for the new submission (i.e., fixed error in ___ parameter; changed to area-weighted spatial averaging, etc.) Please specify the parameter(s) affected, new RFA number(s), and the date of the change. Files for the year 2004 were removed from the archive in 2007 and replaced with version 0.10 data. This replacement was necessary because there were errors in the sea ice and ozone values used in computing the v. 0 fluxes for this year. The v. 0.1 archvie product name is ISCCP-FD_Ed010. It should be treated as a continuation of ISCCP-FD_Ed000. 6) Please provide a list of publications and journal articles pertaining to these data (if any); or a link to a bibliography for the product. Other References other than the main as shown above: Zhang, Y-C., W.B. Rossow and P.W. Stackhouse Jr. (2006), Comparison of different global information sources used in surface radiative flux calculation: Radiative Properties of the Near-surface Atmosphere (Accepted by J. Geophys. Res.). Zhang, Y-C., W.B. Rossow and P.W. Stackhouse Jr. (2006), Comparison of Different Global Information Sources Used in Surface Radiative Flux Calculation: Radiative Properties of the Surface (Accepted by J. Geophys. Res.). Rossow, W.B., Y-C. Zhang and J-H. Wang (2005), A statistical model of cloud vertical structure based on reconciling cloud layer amounts inferred from satellites and radiosonde humidity profiles. J. Climate, 18, 3587-3605. Raschke, E, A. Ohmura, W. B. Rossow, B.E. Carlson, Y-C. Zhang, C. Stubenrauch, M. Kottek and M. Wild, (2005), Cloud effects on the radiation budget based on ISCCP data ( 1991 to 1995), Int. J. Clim, 25: 1103-1125. Zhang, Y.-C. and W. B. Rossow (2002), New ISCCP global radiative flux data products, GEWEX News, Vol. 12, No. 4. Han, Q., W.B. Rossow, J. Chou, K.-S., Huo, and R.M. Welch (1999): The effects of aspect ratio and surface roughness on satellite retrievals of ice-cloud properties. J. Quant. Spectrosc. Radiat. Transfer, 63, 559-583. Han, Q., W.B. Rossow, and A.A. Lacis (1994): Near-global survey of effective droplet radii in liquid water clouds using ISCCP data. J. Climate, 7, 465-497. Wang, J., W.B. Rossow, and Y. Zhang (2000): Cloud vertical structur and its variations from a 20-year global rawinsonde dataset. J. Climate, 13, 3041-3056. Zhang, Y.-C., W.B. Rossow and A. A. Lacis (1995), Calculation of surface and top of atmosphere radiative fluxes from physical quantities based on ISCCP data sets, 1. Method and sensitivity to input data uncertainties, J. Geophys. Res., 100, 1149-1165. Rossow, W.B. and Y.-C. Zhang (1995), Calculation of surface and top of atmosphere radiative fluxes from physical quantities based on ISCCP data sets, 2. Validation and first results, J. Geophys. Res., 100, 1167-1197. 7) If you would like a specific citation or acknowlegment when these data are used in a publication, please provide that here: Zhang, Y-C., W. B. Rossow, A. A. Lacis, V. Oinas, and M. I. Mishchenko (2004), Calculation of radiative fluxes from the surface to top of atmosphere based on ISCCP and other global data sets: Refinements of the radiative transfer model and the input data, J. Geophys. Res., 109, D19105, doi:10.1029/2003JD004457. 8) Please indicate below all data types currently included in the GEWEX-RFA archive for this data product. ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-AALB ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-ALWNET ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-ALWUP ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-ASWDN ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-ASWNET ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-ASWUP ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-ATOTNET ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-CALB2 ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-CLWNET2 ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-CLWUP2 ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-CSWDN2 ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-CSWNET2 ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-CSWUP2 ISCCP-FD_Ed000_TOA-MAP-MON-GLOB-CTOTNET2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-AALB ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-ALWDN ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-ALWNET ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-ALWUP ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-ASWDN ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-ASWNET ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-ASWUP ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-ATOTNET ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CALB2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CLWDN2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CLWNET2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CLWUP2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CSWDN2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CSWNET2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CSWUP2 ISCCP-FD_Ed000_SFC-MAP-MON-GLOB-CTOTNET2 A) Top of atmosphere data products __14___ Maps (Parameters: list here) _____ Time series (Parameters: list here) B) Surface data products __16___ Maps (Parameters: list here) _____ Time series (Parameters: list here) C) Ground-based measurements _____ Time series (Parameters: list here) ------------------------------------------------------------------------ Atmospheric Science Data Center NASA Langley Research Center User and Data Services MS 157D 2 South Wright St. Hampton, VA 23681-2199 Tel: (757) 864-8656 Fax: (757) 864-8807 Internet: larc@eos.nasa.gov URL: http://eosweb.larc.nasa.gov/