SRB Radiation Fluxes



This data set is only available for a restricted user group, please contact us if you want to access these data.

RESTRICTED only accessable in CEN/MPI net or via CliSAP login  What does that mean?

View data via LAS

Access data via OPeNDAP LongwaveShortwave

Data access via file system: /data/icdc/atmosphere/srb



The objective of NASA/GEWEX SRB project is to produce and archive a long-term record of global gridded datasets for shortwave (SW) and longwave (LW) surface and TOA parameters. SW and LW SRB data sets are derived on a 1° x 1° global grid with two sets of algorithms, known as primary and Langley parameterized algorithms, and from a variety of input data sources.

These datasets are produced using cloud parameters derived from International Satellite Cloud Climatology Project (ISCCP) products and meteorological inputs from GMAO reanalysis datasets with radiative transfer algorithms. Column ozone values were obtained from the Total Ozone Mapping Spectrometer (TOMS) archive, from OMI aboard Aura satellite, TOVS and from the beginning of January 2005, GEWEX/SRB started using a daily analysis ozone product from NOAA Climate Predictions Center (CPC), known as the Stratospheric Monitoring-group Ozone Blended Analysis (SMOBA). Temperature and moisture profiles were obtained from the 4-D data assimilation Goddard EOS Data Assimilation System, level-4 (GEOS-4). More information is given on the SRB web page.

This is version 3.0 (shortwave) and 3.1 (longwave of the SRB data set. Data has been downloaded on Februay 10 2014.

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Name Unit
TOA outgoing shortwave radiation, all-sky W/m^2
TOA outgoing shortwave radiation, clearsky W/m^2
TOA outgoing longwave radiation, all-sky W/m^2
TOA outgoing longwave radiation, clearsky W/m^2
TOA incoming shortwave radiation, all-sky W/m^2
Surface shortwave downwelling radiation, all-sky W/m^2
Surface shortwave downwelling radiation, clearsky W/m^2
Surface shortwave upwelling radiation, all-sky W/m^2
Surface shortwave upwelling radiation, clearsky W/m^2
Surface longwave downwelling radiation, all-sky W/m^2
Surface longwave downwelling radiation, clearsky W/m^2
Surface longwave upwelling radiation, all-sky W/m^2
Surface longwave upwelling radiation, clearsky W/m^2
Surface photosynthetically active radiation (PAR) W/m^2
Cloud fraction 0 ... 1
Local solar zenith angle deg
Average solar zenith angle deg

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Coverage, spatial and temporal resolution

Period and temporal resolution: 

  • 07/1983 to 12/2007
  • Monthly

Coverage and spatial resolution:

  • Global
  • Spatial resolution: mostly 1° x 1°, see illustration and web page
  • Geographic longitude: 0.5°E to 359.5°E
  • Geographic latitude: 89.5°S to 89.5°N
  • Dimension: 360 columns x 180 rows
  • Altitude: following terrain for "surface", about 20 km above the Earth's reference ellipsoid for "TOA"


  • NetCDF

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Data quality

The offered data sets do not contain uncertainty estimates.

But a number of documents exist which summarize uncertainties and uncertainty sources as well as the results of the evaluation procedures: --> References

Also there is a well documented list of known issues which arise from data gaps and satellite calibration shifts: --> SRB issues

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NASA Official
Paul W. Stackhouse
email: Paul.W.Stackhouse (at) nasa.gov

NASA Curator
Colleen Mikovitz
email: j.c.mikovitz (at) nasa.gov

Stefan Kern
ICDC / CEN / University of Hamburg
email: stefan.kern (at) uni-hamburg.de

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  • SRB Webpage
  • SRB Publication list
  • SRB Validation / Calibration web page
  • Pinker, R. T. and I. Laszlo, 1992: Modeling Surface Solar Irradiance for Satellite Applications on a Global Scale, J. Appl. Met., 31, 194-211
  • Fu et al., 1997: J. Atmos. Sci., 54, 2799-2812.
  • Gupta et al., 2001: Langley Parameterized SW algorithm - NASA/TP-2001-211272, Dec. 2001
  • Gupta, S. K., A. C. Wilber, W. L. Darnell, and J. T. Suttles, 1993: Longwave Surface Radiation Over the Globe From Satellite Data: An Error Analysis. Int. J. Remote Sens., 14, 95-114.
  • Gupta, S. K., W. L. Darnell, and A. C. Wilber, 1992: A parameterizationof longwave surface radiation from satellite data: Recent improvements. J. Appl. Meteorol., 31, 1361-1367. 
  • Darnell, W. L., S. K. Gupta, and W. F. Staylor, 1986: Downward longwave surface radiation from Sun-synchronous satellite data: Validation of methodology. J. Clim. Appl. Meteorol., 25, 1012-1021. 
  • Stackhouse, Jr., P. W., S. K. Gupta, S. J. Cox, J. C. Mikovitz, T. Zhang, and L. M. Hinkelman, 2011: The NASA/GEWEX Surface Radiation Budget Release 3.0: 24.5-Year Dataset. GEWEX News, 21, No. 1, February, 10-12.
  • Riihela, A., et al., 2017: An intercomparison and validation of satellite-based surface radiative energy flux estimates over the Arctic. J. Geophys. Res. - Atmospheres, 122, 4829-4848.

Data citation

Please refer to 

SRB data were originally provided by the NASA Langley Research Center Atmospheric Sciences Data Center NASA/GEWEX SRB Project.

Please acknowledge also the source of your data download as: Integrated Climate Data Centre (ICDC), CliSAP/KlimaCampus, University of Hamburg, Hamburg, Germany, http://icdc.cen.uni-hamburg.de


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