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Global Precipitation Analyses at Monthly to 3-HR Time ScalesGlobal precipitation analysis covering the last few decades and the impact of the new TRMM precipitation observations are discussed. The 20+ year, monthly, globally complete precipitation analysis of the World Climate Research Program's (WCRP/GEWEX) Global Precipitation Climatology Project (GPCP) is used to explore global and regional variations and trends and is compared to the much shorter TRMM(Tropica1 Rainfall Measuring Mission) tropical data set. A trend pattern that is a combination of both El Nino and La Nina precipitation features is evident in the 20-year data set. This pattern is related to an increase with time in the number of combined months of El Nino and La Nina during the 20 year period. Monthly anomalies of precipitation are related to ENSO variations with clear signals extending into middle and high latitudes of both hemispheres. The GPCP daily, 1deg latitude-longitude analysis, which is available from January 1997 to the present is described and the evolution of precipitation patterns on this time scale related to El Nino and La Nina is described. Finally, a TRMM-based 3-hr analysis is described that uses TRMM to calibrate polar-orbit microwave observations from SSM/I and geosynchronous IR observations and merges the various calibrated observations into a final, 3-hr resolution map. This TRMM standard product will soon be available for the entire TRMM period (January 1998- present). A real-time version of this merged product is being produced and is available at 0.25deg latitude-longitude resolution over the latitude range from 50degN-50degS. Images from this data set can be seen at the U.S. TRMM web site (trmm.gsfc.nasa.gov). Examples will be shown, including its use in monitoring flood conditions and relating weather-scale events to climate variations.
Document ID
20030020733
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Adler, Robert F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Huffman, George
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Curtis, Scott
(Maryland Univ. Baltimore County Catonsville, MD, United States)
Bolvin, David
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Nelkin, Eric
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: International Precipitation Working Group Workshop
Location: Madrid
Country: Spain
Start Date: September 23, 2002
End Date: September 27, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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