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The relation of radar to cloud area-time integrals and implications for rain measurements from spaceThe relationships between satellite-based and radar-measured area-time integrals (ATI) for convective storms are determined, and both are shown to depend on the climatological conditional mean rain rate and the ratio of the measured cloud area to the actual rain area of the storms. The GOES precipitation index of Arkin (1986) for convective storms, an area-time integral for satellite cloud areas, is shown to be related to the ATI for radar-observed rain areas. The quality of GPI-based rainfall estimates depends on how well the cloud area is related to the rain area and the size of the sampling domain. It is also noted that the use of a GOES cloud ATI in conjunction with the radar area-time integral will improve the accuracy of rainfall estimates and allow such estimates to be made in much smaller space-time domains than the 1-month and 5-deg boxes anticipated for the Tropical Rainfall Measuring Mission.
Document ID
19920072262
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Atlas, David
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bell, Thomas L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 15, 2013
Publication Date
September 1, 1992
Publication Information
Publication: Monthly Weather Review
Volume: 120
Issue: 9, Se
ISSN: 0027-0644
Subject Category
Meteorology And Climatology
Accession Number
92A54886
Distribution Limits
Public
Copyright
Other

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