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The Global Precipitation Climatology Project, produced by the NASA Mesoscale Atmospheric Processes Laboratory, comprises threee products: One-Degree Daily (1DD), monthly product and Pentad data. We downloaded the daily product version 1.2 and 1.3 which correspond respectively to the v2.2 and v2.3 for monthly data. Version 1.3 is the most recent but is still a beta test so you should expect changes. The GPCP One-Degree Daily Precipitation Data Set (1DD Data Set) provides daily, global 1x1-deg gridded fields of precipitation totals for October 1996 through the delayed present. The 1DD draws upon several different data sources, surface and satellite measurements, covering different areas of the globe. This product is updated sporadically, about once a month. We downloaded v1.3 from the | NCEI server, and v1.2 from the | NCAR Research Data Archive . More information is available from the | GPCP webpage .


Access is free but users are requested to add the official citation as below and email the citation to or


v1.2 Huffman, G. J., D. T. Bolvin, and R. F. Adler. 2016. GPCP Version 1.2 One-Degree Daily Precipitation Data Set. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. Accessed† 30 Jan 2018.

v1.3 Simply use references, for the moment no specific indication has been given.


Huffman, G. J., R. F. Adler, M. M. Morrissey, D. T. Bolvin, S. Curtis, R. Joyce, B. McGavock, and J. Susskind, 2001: | Global precipitation at one-degree daily resolution from multisatellite observations. J. Hydrometeor., 2, 36-50 (DOI: 10.1175/1525-7541(2001)002<0036:GPAODD>2.0.CO;2).

GPCP on raijin

We downloaded the daily product v1.2 and v1-3 which are available from the ua8 project

  • /g/data/ua8/GPCP/day/v1-#/<YYYY>/<files>
    • v1-2

Files are in netcdf4 format and filenames are


where the date is the represented day For example:

    • v1-3

Files are in netcdf4 format and filenames are

  • gpcp_v01r03_daily_dYYYYMMDD_cYYYYMMDD

where the first date is the represented day and the second is the creation date for the file. For example:

  • gpcp_v01r03_daily_d20170323_c20171211