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Precipitation observed over the South China Sea by the Nimbus-7 Scanning Multichannel Microwave Radiometer during Winter MonexMesoscale cloud clusters near the northwestern coast of Borneo were observed by the Scanning Multichannel Microwave Radiometer (SMMR) on three occasions during the Winter Monsoon Experiment in December 1978. A nondimensional form of the SMMR 37 GHz polarization difference is introduced and used to identify regions of precipitation, and these are compared with visible and infrared imagery from the GMS-1 geostationary satellite. For two of the three cloud cluster cases, quantitative comparisons are made between nearly simultaneous SMMR observations and reflectivity observations made by the MIT WR-73 digital weather radar at Bintulu. Though limited in scope, these represent the first known direct comparisons between digital radar-derived rain parameters and satellite passive microwave observations of near-equatorial precipitation. SMMR 37 GHz observations are found to be much better indicators of fractional coverage of each SMMR footprint by rain than of average rain rate within the footprint. Total area coverage by precipitation is estimated for all three clusters using this result.
Document ID
19900047694
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Petty, Grant W.
(Washington Univ. Seattle, WA, United States)
Katsaros, Kristina B.
(Washington, University Seattle, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1990
Publication Information
Publication: Journal of Applied Meteorology
Volume: 29
ISSN: 0894-8763
Subject Category
Meteorology And Climatology
Accession Number
90A34749
Funding Number(s)
CONTRACT_GRANT: NAG5-784
CONTRACT_GRANT: NAG5-943
CONTRACT_GRANT: NAG5-354
Distribution Limits
Public
Copyright
Other

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