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The Version-2 Global Precipitation Climatology Project (GPCP) Monthly Precipitation Analysis (1979–Present)

Robert F. Adler, George J. Huffman, Alfred T. C. Chang, Ralph R. Ferraro, Pingping Xie, John E. Janowiak, Bruno Rudolf, Udo Schneider, Scott Curtis, David T. Bolvin, Arnold Gruber, Joel Susskind, Phillip A. Arkin, Eric J. Nelkin

Journal of Hydrometeorology · 2003 · 5,567 citationsOpen access

doi.org/10.1175/1525-7541(2003)004<1147:tvgpcp>2.0.co;2Free full text

Abstract

The Global Precipitation Climatology Project (GPCP) Version-2 Monthly Precipitation Analysis is described.This globally complete, monthly analysis of surface precipitation at 2.5Њ latitude ϫ 2.5Њ longitude resolution is available from January 1979 to the present.It is a merged analysis that incorporates precipitation estimates from low-orbit satellite microwave data, geosynchronous-orbit satellite infrared data, and surface rain gauge observations.The merging approach utilizes the higher accuracy of the low-orbit microwave observations to calibrate, or adjust, the more frequent geosynchronous infrared observations.The dataset is extended back into the premicrowave era (before mid-1987) by using infrared-only observations calibrated to the microwave-based analysis of the later years.The combined satellite-based product is adjusted by the rain gauge analysis.The dataset archive also contains the individual input fields, a combined satellite estimate, and error estimates for each field.This monthly analysis is the foundation for the GPCP suite of products, including those at finer temporal resolution.The 23-yr GPCP climatology is characterized, along with time and space variations of precipitation.

Cite this paper

Adler, R. F., Huffman, G. J., Chang, A. T. C., Ferraro, R. R., Xie, P., Janowiak, J. E., Rudolf, B., Schneider, U., Curtis, S., Bolvin, D. T., Gruber, A., Susskind, J., Arkin, P. A., & Nelkin, E. J. (2003). The Version-2 global precipitation climatology project (GPCP) monthly precipitation analysis (1979–Present). Journal of Hydrometeorology, 4(6), 1147–1167. https://doi.org/10.1175/1525-7541(2003)004<1147:tvgpcp>2.0.co;2

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