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The Global Precipitation Climatology Project (GPCP) Combined Precipitation Dataset

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The Global Precipitation Climatology Project (GPCP) has released the GPCP Version 1 Combined Precipitation Data Set, a global, monthly precipitation dataset covering the period July 1987 through December 1995. The primary product in the dataset is a merged analysis incorporating precipitation estimates from low-orbit-satellite microwave data, geosynchronous-orbit-satellite infrared data, and rain gauge observations. The dataset also contains the individual input fields, a combination of the microwave and infrared satellite estimates, and error estimates for each field. The data are provided on 2.5° × 2.5° latitude-longitude global grids. Preliminary analyses show general agreement with prior studies of global precipitation and extends prior studies of El Nino-Southern Oscillation precipitation patterns. At the regional scale there are systematic differences with standard climatologies.

*NAS A/GSFC Laboratory for Atmospheres, and Science Systems and Applications, Inc., Greenbelt, Maryland.

+NAS A/GSFC Laboratory for Atmospheres, Greenbelt, Maryland.

#OAA/NWS National Centers for Environmental Prediction, Camp Springs, Maryland.

@NASA/GSFC Laboratory for Hydrospheric Processes, Greenbelt, Maryland.

&NOAA/NESDIS Office of Research and Applications, Camp Springs, Maryland.

**NOAA/NESDIS National Climatic Data Center, Asheville, North Carolina.

++Deutscher Wetterdienst, Global Precipitation Climatology Centre, Offenbach am Main, Germany.

Corresponding author address: George J. Huffman, Code 912, NASA/GSFC, Greenbelt, MD 20771. E-mail: huffman@agnes.gsfc.nasa.gov

The Global Precipitation Climatology Project (GPCP) has released the GPCP Version 1 Combined Precipitation Data Set, a global, monthly precipitation dataset covering the period July 1987 through December 1995. The primary product in the dataset is a merged analysis incorporating precipitation estimates from low-orbit-satellite microwave data, geosynchronous-orbit-satellite infrared data, and rain gauge observations. The dataset also contains the individual input fields, a combination of the microwave and infrared satellite estimates, and error estimates for each field. The data are provided on 2.5° × 2.5° latitude-longitude global grids. Preliminary analyses show general agreement with prior studies of global precipitation and extends prior studies of El Nino-Southern Oscillation precipitation patterns. At the regional scale there are systematic differences with standard climatologies.

*NAS A/GSFC Laboratory for Atmospheres, and Science Systems and Applications, Inc., Greenbelt, Maryland.

+NAS A/GSFC Laboratory for Atmospheres, Greenbelt, Maryland.

#OAA/NWS National Centers for Environmental Prediction, Camp Springs, Maryland.

@NASA/GSFC Laboratory for Hydrospheric Processes, Greenbelt, Maryland.

&NOAA/NESDIS Office of Research and Applications, Camp Springs, Maryland.

**NOAA/NESDIS National Climatic Data Center, Asheville, North Carolina.

++Deutscher Wetterdienst, Global Precipitation Climatology Centre, Offenbach am Main, Germany.

Corresponding author address: George J. Huffman, Code 912, NASA/GSFC, Greenbelt, MD 20771. E-mail: huffman@agnes.gsfc.nasa.gov
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