湘西北暴雨對鄂東南降雨影響的合成對比分析

doi:10.3969/2012jms.00**

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湘西北暴雨對鄂東南降雨影響的合成對比分析
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                        10.3969/2012jms.00**
                    
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中圖分類號:P458
基金項目:武漢暴雨開放基金重點項目?

A compare study of impacts on southeast Hubei Province from rainstorms of northwest Hunan Province

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摘要:

先介紹前一天湘西北出現(xiàn)暴雨后,次日鄂東南出現(xiàn)與不出現(xiàn)暴雨的兩個個例,然后統(tǒng)計2003-2006年4-9月前一天湘西北出現(xiàn)暴雨前提下次日鄂東南出現(xiàn)暴雨與否的兩種情況.應用ECMWF格點分析資料,將6個鄂東南次日出現(xiàn)暴雨個例進行合成,同時選出6個鄂東南次日不出現(xiàn)暴雨個例進行合成.對比研究這兩種情況在天氣過程前、過程中和過程后天氣要素場差別,發(fā)現(xiàn)次日鄂東南出現(xiàn)暴雨的情況500 hPa影響低槽偏深、位置偏西、東移速度偏慢;850 hPa江南有西南風急流出現(xiàn),鄂東南有θse≥345 K高能舌活動.次日鄂東南不出現(xiàn)暴雨,500 hPa低槽淺、位置偏東、東移較快,鄂東南地區(qū)由弱槽轉(zhuǎn)為弱脊;850 hPa江南地區(qū)沒有出現(xiàn)西南風急流,鄂東南沒有θse≥345K高能舌活動.

Abstract:

In this paper, two cases are introduced in which rainstorms occurred first in northwest Hunan Province, but the next day it had heavy rain in southeast Hubei Province in one case only. A statistic is made from April to September in the years of 2003 to 2006 to find out how seriously cloud clusters of rainstorm occurred in northwest Hunan Province would influence southeast Hubei Province. Applying grid data from ECMWF, six rainstorms took place in southeast Hubei Province have been composed while six events which rainstorms did not occur there have also been composed. Its discovered that there were quite a lot of differences in these weather elements between two events based on a compare study. The main differences lie in that the trough at 500 hPa was deeper, located farther and moved slowly, that there was an obvious LLJ at 850 hPa, and that there appears an obvious conversion from high energy zone to low energy zone in southeast Hubei Province.

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張端禹,廖移山,張兵,李紅莉,馮光柳.湘西北暴雨對鄂東南降雨影響的合成對比分析.氣象科學,2009,(2):252-259 Zhang Duanyu, Liao Yishan, Zhang Bing, Li Hongli, Feng Guangliu. A compare study of impacts on southeast Hubei Province from rainstorms of northwest Hunan Province. Journal of the Meteorological Sciences,2009,(2):252-259

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