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TRMM observations of polarization difference in 85 GHz: Information about hydrometeors and rain rate

Title
TRMM observations of polarization difference in 85 GHz: Information about hydrometeors and rain rate
Authors
Prabhakara C.Iacovazzi Jr. R.Yoo J.-M.
Ewha Authors
유정문
SCOPUS Author ID
유정문scopus
Issue Date
2001
Journal Title
Journal of the Meteorological Society of Japan
ISSN
0026-1165JCR Link
Citation
vol. 79, no. 2, pp. 701 - 707
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Observations made by the Precipitation Radar (PR) and the Microwave Imager (TMI) radiometer on board the Tropical Rainfall Measuring Mission (TRMM) satellite help us to show the significance of the 85 GHz polarization difference, PD85, measured by TMI. Rain type, convective or stratiform, deduced from the PR allows us to infer that PD85 is generally positive in stratiform rain clouds, while PD85 can be markedly negative in deep convective rain clouds. Furthermore, PD85 increases in a gross manner as stratiform rain rate increases. On the contrary, in a crude fashion PD85 decreases as convective rain rate increases. From the observations of TMI and PR, we find that PD85 is a weak indicator of rain rate. Utilizing information from existing polarimetric radar studies, we infer that negative values of PD85 are likely associated with vertically-oriented small oblate or wet hail that are found in deep convective updrafts. ©2001, Meteorological Society of Japan.
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사범대학 > 과학교육과 > Journal papers
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