Analysis of Rain Classifications over the Tropics by Version 7 of the TRMM PR 2A23 Algorithm

• Aaron FUNK

  Department of Atmospheric Sciences Texas A & M University, College Station, Texas, USA

• Courtney SCHUMACHER

  Department of Atmospheric Sciences Texas A & M University, College Station, Texas, USA

• Jun AWAKA

  Liberal Arts Education Center Tokai University, Sapporo, Japan

抄録

 The Tropical Rainfall Measuring Mission (TRMM) precipitation radar (PR) 2A23 algorithm attempts to classify rain echo as stratiform or convective. Updates to the 2A23 algorithm for Version 7 (V7) have resulted in an increase (decrease) in the fraction of rain echo classified as convective (stratiform) compared with the previous version of the algorithm. This is caused in part by more shallow non-isolated echoes, which exhibit strong concentrations over the Pacific intertropical convergence zone (ITCZ), being classified as convective in V7. The tropics-wide (20°N-20°S) stratiform rain fraction has decreased correspondingly from 40% to 38% between Version 5 (V5) and V7. It is suggested that two additional stratiform categories could be considered convective because of the prevalence of warm-rain processes in each, particularly, higher altitude rain over mountainous terrain and shallow non-isolated rain over tropical oceans; this would decrease the tropics-wide stratiform rain fraction to 35%.

収録刊行物

• 気象集誌. 第2輯

  気象集誌. 第2輯 91 (3), 257-272, 2013

  公益社団法人 日本気象学会

キーワード

• TRMM
• 2A23
• precipitation radar

詳細情報

• CRID: 1390001206504589952
• NII論文ID: 130004788778
• NII書誌ID: AA00702524
• DOI: 10.2151/jmsj.2013-302
• ISSN: 21869057
• ISSN: 00261165
• NDL書誌ID: 024631781
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024631781
• Web Site: https://www.jstage.jst.go.jp/article/jmsj/91/3/91_2013-302/_pdf
• 本文言語コード: en
• データソース種別:
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