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Global Precipitation Climatology Project (GPCP) Clearinghouse

Datasets provides monthly, pentad, and daily precipitation analysis from surface and satellite measurements for 1979 onwards (1997 onwards for daily). In this case the WDC serves as a secondary conduit of this data in conjunction with NASA/GSFC.

Data Access: 

  • 1 Degree Daily (1DD) Precipitation Estimate: The GPCP One-Degree Daily (1DD) version 1.2 released an official GPCP product on February 12, 2013. 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 covering different areas of the globe. Every attempt has been made to make the complete record homogeneous, given the different available input sources.  
  • GPCP monthly product: The Global Precipitation Climatology Project (GPCP) comprises a total of 27 products with the two primary products being the monthly satellite-gauge and associated precipitation error estimates. The Version 2.3 monthly product covers the period January 1979 to the present, with a delay of two to three months for data reception and processing. Version 2.3 supersedes all previous versions of the GPCP monthly product, including Versions 1, 1b, 1c, V2x79, 2, 2.2 and 2.1. (Previous versions are not available from the NOAA/NCEI archive).
  • Pentad DataThe Global Precipitation Climatology Project (GPCP) comprises a total of 27 products. The Version 2.2 Pentad product covers the period January 1979 to the present, with a delay of two to three months for data reception and processing. Version 2.2 supersedes all previous versions of the GPCP pentad product (Previous versions are not available from the NOAA/NCEI archive). All the GPCP products are produced by optimally merging precipitation estimates computed from microwave, infrared, sounder data observed by the international constellation of precipitation-related satellites, and precipitation gauge analysis, taking advantage of the strengths of each data type. Files are provided monthly, and the newest pentad data are appended to a yearly data file as they are available. Data are available on a 2.5 degree grid. 

Contact Information:

  • General inquiries about NCEI participation in international activities, regarding specific functions and services of  World Data Center for Meteorology, Asheville or requests for data should be directed to: