The Global Precipitation Climatology Project (GPCP) monthly analysis (New Version 2.3) and a review of 2017 global precipitation

Robert F. Adler, Mathew R.P. Sapiano, George J. Huffman, Jian Jian Wang, Guojun Gu, David Bolvin, Long Chiu, Udo Schneider, Andreas Becker, Eric Nelkin, Pingping Xie, Ralph Ferraro, Dong Bin Shin

Research output: Contribution to journalArticlepeer-review

311 Citations (Scopus)


The new Version 2.3 of the Global Precipitation Climatology Project (GPCP) Monthly analysis is described in terms of changes made to improve the homogeneity of the product, especially after 2002. These changes include corrections to cross-calibration of satellite data inputs and updates to the gauge analysis. Over-ocean changes starting in 2003 resulted in an overall precipitation increase of 1.8% after 2009. Updating the gauge analysis to its final, high-quality version increases the global land total by 1.8% for the post-2002 period. These changes correct a small, incorrect dip in the estimated global precipitation over the last decade given by the earlier Version 2.2. The GPCP analysis is also used to describe global precipitation in 2017. The general La Niña pattern for 2017 is noted and the evolution from the early 2016 El Niño pattern is described. The 2017 global value is one of the highest for the 1979-2017 period, exceeded only by 2016 and 1998 (both El Niño years), and reinforces the small positive trend. Results for 2017 also reinforce significant trends in precipitation intensity (on a monthly scale) in the tropics. These results for 2017 indicate the value of the GPCP analysis, in addition to research, for climate monitoring.

Original languageEnglish
Article number138
Issue number4
Publication statusPublished - 2018 Apr 7

Bibliographical note

Funding Information:
This work was carried out by the international GPCP group with support from numerous entities, including NASA and NOAA in the U.S. and the DeutscherWetterdienst in Germany. NOAA's National Centers for Environmental Information (NCEI) specifically supported the V2.3 development and production and the development of the ICDR product.

Publisher Copyright:
© 2018 by the authors.

All Science Journal Classification (ASJC) codes

  • Environmental Science (miscellaneous)


Dive into the research topics of 'The Global Precipitation Climatology Project (GPCP) monthly analysis (New Version 2.3) and a review of 2017 global precipitation'. Together they form a unique fingerprint.

Cite this