An orography-associated extreme rainfall event during TiMREX: Initiation, storm evolution, and maintenance

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题名:	An orography-associated extreme rainfall event during TiMREX: Initiation, storm evolution, and maintenance
作者:	廖宇慶;Xu, Weixin;Zipser, Edward J;Chen, Yi-Leng;Liu, Chuntao;Liou, Yu-Chieng;Lee, Wen-Chau;Jou, Ben Jong-Dao
贡献者:	地球科學學院大氣科學學系
关键词:	Coastal zone;Cold;Earth, ocean, space;Exact sciences and technology;External geophysics;Extreme weather;Meteorology;Orography;Precipitation;Rain;Rainfall;Upstream;Wind
日期:	2012-08-01
上传时间:	2026-04-21 13:36:15 (UTC+8)
出版者:	American Meteorological Society;Boston, MA: American Meteorological Society
摘要:	摘要： AbstractThis study investigates a long-duration mesoscale system with extremely heavy rainfall over southwest Taiwan during the Terrain-influenced Monsoon Rainfall Experiment (TiMREX). This mesoscale convective system develops offshore and stays quasi-stationary over the upstream ocean and southwest coast of Taiwan. New convection keeps developing upstream offshore but decays or dies after moving into the island, dropping the heaviest rain over the upstream ocean and coastal regions. Warm, moist, unstable conditions and a low-level jet (LLJ) are found only over the upstream ocean, while the island of Taiwan is under the control of a weak cold pool. The LLJ is lifted upward at the boundary between the cold pool and LLJ. Most convective clusters supporting the long-lived rainy mesoscale system are initiated and develop along that boundary. The initiation and maintenance is thought to be a “back-building–quasi-stationary” process. The cold pool forms from previous persistent precipitation with a temperature depression of 2°–4°C in the lowest 500 m, while the high terrain in Taiwan is thought to trap the cold pool from spreading or moving. As a result, the orography of Taiwan is “extended” to the upstream ocean and plays an indirect effect on the long-duration mesoscale system. 出版者： Boston, MA: American Meteorological Society 出版日期： 2012-08-01 出處： Monthly Weather Review, 2012-08, Vol.140 (8), p.2555-2574 資源來源： EBSCOhost OmniFile Full Text Select 版權： 2015 INIST-CNRS 版權： Copyright American Meteorological Society Aug 2012 識別號： ISSN: 0027-0644 識別號： ISSN: 1520-0493 識別號： EISSN: 1520-0493 識別號： DOI: 10.1175/mwr-d-11-00208.1 識別號： CODEN: MWREAB
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