呼和浩特市一次大暴雨天气的湿位涡诊断分析 |
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引用本文: | 赵艳丽,王秀萍,杨彩云,杜文娟.呼和浩特市一次大暴雨天气的湿位涡诊断分析[J].内蒙古气象,2011(2):9-12. |
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作者姓名: | 赵艳丽 王秀萍 杨彩云 杜文娟 |
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作者单位: | 1. 呼和浩特市气象局,内蒙古,呼和浩特,010020 2. 托克托县气象局,内蒙古,托克托甚,010200 |
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摘 要: | 对1998年7月12日发生在呼和浩特地区的大暴雨天气过程进行了湿位涡初步诊断分析。结果表明:湿位涡在暴雨预报中具有较好的指示性,当对流层低层MPVl<0,同时MPV2>0时,暴雨易发生。从500hPa到对流层中高层,在切变线的附近有一个大的湿位涡正值中心,各层中心的位置基本相对应,从中层到高层略向北倾,越到高层中心值越大。强降水位于低层湿位涡高值区东北侧正位涡较小的地区,并与位涡斜压部分的负值中心相对应,随着斜压负值中心强度的增强,暴雨加强。
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关 键 词: | 暴雨 湿位涡 诊断分析 |
A Diagnostic Analysis of Moist Potential Vorticity of Heavy Rain Weather in Hohhot |
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Authors: | Zhao Yanli Wang Xiuping Yang Caiyun Du Wenjuan |
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Institution: | Zhao Yanli,Wang Xiuping,Yang Caiyun,Du Wenjuan (Hohhot Meteorological Bureau,Inner Monggolia Hohhot 010020) |
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Abstract: | Based on the preliminary diagnostic analysis of moist potential vorticity(MPV) of heavy rain event at July 12,1998 in hohhot,the results showed that the moist potential vorticity has a good indicative function for the heavy rain forecast.At lower troposphere,when the MPV1 is less than 0 and the MPV2 is greater than 0,it is prone to heavy rain.From 500hpa to upper-middle troposphere,there is a positive center of big moist potential vorticity nearby the shear line,the position of each layer was basic correspo... |
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Keywords: | heavy Rain moist potential vorticity diagnostic analysis |
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