TRMM Observations of Polarization Difference in 85 GHz : Information about Hydrometeors and Rain Rate

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概要

• 論文の詳細を見る

• 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.

• 社団法人日本気象学会の論文
• 2001-04-25

著者

• Iacovazzi R.

  Goddard Space Flight Center

• Prabhakara C.

  Nasa

• IACOVAZZI Jr.

  Goddard Space Flight Center

• Yoo J.

  Raytheon ITSS Corporation

• Yoo J.-M.

  Raytheon ITSS Corporation

関連論文

• 陸域に適用可能なマイクロ波放射計降雨推定方法
• TRMM Precipitation Radar and Microwave Imager Observations of Convective and Stratiform Rain over Land and their Theoretical Implications
• TRMM Observations of Polarization Difference in 85 GHz : Information about Hydrometeors and Rain Rate

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