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GPCP Version 2.2 Combined Precipitation Data Set (Final)rss feed

Mean files have been converted to netCDF4-classic format

Brief Description:

  • Global Precipitation Climatology Project monthly precipitation dataset from 1979-present combines observations and satellite precipitation data into 2.5°x2.5° global grids.

Temporal Coverage:

  • Monthly values 1979/01 through Oct 2015 .
  • Long term monthly means, derived from years 1981 - 2010.

Spatial Coverage:

  • 2.5 degree latitude x 2.5 degree longitude global grid (144x72)
  • 88.75N - 88.75S, 1.25E - 358.75E
Latest available data: Click to Enlarge

Levels:

  • N/A

Update Schedule:

  • Irregular

Download/Plot Data:

Variable Statistic Level Download File Create Plot/Subset
Precipitation Monthly Mean ' ' precip.mon.mean.nc plot
Precipitation Monthly Error Estimate ' ' precip.mon.mean.error.nc plot
Precipitation Monthly LTM (1979-2000) ' ' precip.mon.1979-2000.ltm.nc plot
Precipitation Monthly LTM (1981-2010) ' ' precip.mon.ltm.nc plot

Other Plotting/Analysis Tools for this dataset:

Usage Restrictions:

  • None

Detailed Description:

  • This data set consists of monthly means of precipitation derived from satellite and gauge measurements. From the documentation
    "The work is being carried out as part of the Global Precipitation Climatology Project (*GPCP*), an international project of the WMO/WCRP/GEWEX designed to provide improved long-record estimates of precipitation over the globe. The GPCP home page is located at http://precip.gsfc.nasa.gov/

    The Version 2 Data Set contains data from several *contributing centers*:

    1. GPCP Polar Satellite Precipitation Data Centre - Emission (SSM/I emission estimates),
    2. F17 SSMIS: calibrating microwave data source to replace the F13 SSM/I, which failed in September 2009.
    3. GPCP Polar Satellite Precipitation Data Centre - Scattering (SSM/I scattering estimates),
    4. GPCP Geostationary Satellite Precipitation Data Centre (GPI and OPI estimates and rain gauge analyses),
    5. NASA/GSFC Satellite Applications Office (TOVS estimates), and
    6. GPCP Global Precipitation Climatology Centre (rain gauge analyses),
    The final satellite-gauge combination, the single-source input data and the intermediate satellite-only combination products are currently being distributed. Some single-source data sets extend beyond the periods for which they're used in Version 2 in their original archival locations. The latter two are only posted for months in which they contribute to the final product."

    Please read the complete documentation at NASA for a more complete description of all aspects of how the dataset was put together including quality control, estimation methods.

    Additional information is available from NASA at http://precip.gsfc.nasa.gov/ and more specifically at their ftp site.

    Please note: If you acquire GPCP data products from PSD, we ask that you acknowledge us in your use of the data. This may be done by including text such as GPCP data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.esrl.noaa.gov/psd/ in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSD to justify keeping the GPCP data set freely available online in the future. Thank you!

    To acknowledge the data source, the authors suggest that one possible wording is: "The GPCP combined precipitation data were developed and computed by the NASA/Goddard Space Flight Center's Laboratory for Atmospheres as a contribution to the GEWEX Global Precipitation Climatology Project."

Caveats:

  • None

Related File Naming & Structure Information:

File Names:

  • precip.mon.statistic.nc   (In directory: /Datasets/gpcp/)

OpenDap File Names:

  • http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/gpcp/precip.mon.statistic.nc   

Dataset Format and Size:

  • PSD standard NetCDF 13 Mbyte file for each monthly file.
  • PSD standard NetCDF .5 Mbyte file for the long term mean file.

Missing Data:

  • Missing data is flagged with a value of -9.96921e+36f.

Citation:

  • Please note: If you acquire GPCP Precipitation data products from PSD, we ask that you acknowledge us in your use of the data. This may be done by including text such as GPCP Precipitation data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.esrl.noaa.gov/psd/ in any documents or publications using these data. We would also appreciate receiving a copy of the relevant publications. This will help PSD to justify keeping the GPCP Precipitation data set freely available online in the future. Thank you!
  • For dataset: Adler, R.F., G.J. Huffman, A. Chang, R. Ferraro, P. Xie, J. Janowiak, B. Rudolf, U. Schneider, S. Curtis, D. Bolvin, A. Gruber, J. Susskind, and P. Arkin, 2003: The Version 2 Global Precipitation Climatology Project (GPCP) Monthly Precipitation Analysis (1979-Present). J. Hydrometeor., 4,1147-1167.

References:

  • Adler, R.F., G.J. Huffman, A. Chang, R. Ferraro, P. Xie, J. Janowiak, B. Rudolf, U. Schneider, S. Curtis, D. Bolvin, A. Gruber, J. Susskind, P. Arkin, E. Nelkin 2003: The Version 2 Global Precipitation Climatology Project (GPCP) Monthly Precipitation Analysis (1979-Present). J. Hydrometeor., 4,1147-1167.
  • Huffman, G.J, R.F. Adler, D.T. Bolvin, G. Gu 2009: Improving the Global Precipitation Record: GPCP Version 2.1. Geophys. Res. Lett., 36,L17808, doi:10.1029/2009GL040000.

Original Source:

Contact:

  • Physical Sciences Division: Data Management
    NOAA/ESRL/PSD
    325 Broadway
    Boulder, CO 80305-3328
    esrl.psd.data@noaa.gov