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台风背景下重庆暴雨的环境场对比分析 被引量:3

Rainstorm Under Typhoon Background: Comparative Analysis of Environment Field in Chongqing
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摘要 为了摸清远距离台风和重庆暴雨的关系,笔者统计分析了2000—2014年台风背景下重庆暴雨个例共计57个,指出与重庆暴雨统计关系最密切的台风路径分别为西行路径和北上路径;从年际变化和月际变化上分别对其进行统计分析,发现影响重庆暴雨的台风一般最早出现在4月中旬,最晚出现在10月初,6—8月最多,其中7月发生远距离台风暴雨次数最多;通过合成分析发现,造成区域暴雨的西行台风和未达到区域暴雨的西行台风暴雨的环流背景存在明显差异;对产生重庆暴雨的台风流场进行对比分析,得出易造成重庆暴雨的4种类型的环流形势:东高西低型,西风倒槽鞍型场流型,中纬度低压流型和平直西风型。 To find out the relationship between long distance typhoon and rainstorm in Chongqing, the authorsanalyzed 57 typhoon rainstorm cases in Chongqing under the typhoon background using statistical analysisrespectively from the monthly and interannual variations. The authors pointed out that the typhoon path whichwas closely related with rainstorm in Chongqing was west path and north path. The result showed that: thetyphoon rainstorms in Chongqing first appeared in mid-April, and the latest was in early October, most of thetyphoon rainstorms were in June to August, the number of long distance typhoon rainstorms appeared most inJuly. Through synthetic analysis, the authors found out that the circumfluent background between regionaltyphoon rainstorm and typhoon rainstorm which had not reached regional rainstorm had significant differences;there were 4 flow patterns: east high west low, west wind inverted trough saddle shaped flow pattern, mid-latitude low pressure flow and straight west wind by contrastive analysis on synthetic typhoon flow.
机构地区 重庆市气象台
出处 《中国农学通报》 2017年第1期111-119,共9页 Chinese Agricultural Science Bulletin
基金 公益性行业(气象)科研专项"三峡库区典型流域山洪监测预警技术方法研究"(GYHY201206028) 中国气象局预报员专项"远距离台风对重庆强降雨的初步分析"(CMAYBY2015-061) 重庆市气象局业务技术攻关重点(团队)项目"重庆暴雨预报技术研究"(YWGG-201506)
关键词 远距离台风 重庆暴雨 统计 long distance typhoon rainstorm in Chongqing statistics
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