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中文摘要: 利用常规的探空和地面观测资料以及中尺度模式所提供的高时空分辨率资料,对2002年6月8～9日发生在青藏高原东侧陕西省的一次罕见大暴雨过程的环流形势及位涡场特征进行了诊断和分析。结果表明,湿位涡的时空演变对中尺度气旋及暴雨的发生发展有指示意义,强降水发生在对流层低层较大的正负湿位涡区域交界处,中尺度气旋的迅速发展与对流层高层位涡扰动的下传有密切联系。
中文关键词: 暴雨，湿位涡，诊断分析
Abstract:By using the routine sounding and surface observation data, the circulation features and physical causes for the heavy rain event occurred in the East Side of Qinghai-Tibet Plateau on 8-9 June, 2002 are diagnosed. Furthermore, based on MM4 model output,a mesoscale analysis is made according to moist potential vorticity. The results show that the spatial and temporal variations of moist potential vorticity can give good indication of the development of mesoscale cyclone and heavy rain. The heavy rain is located between the positive and negative moist potential vorticity zones in the lower troposphere, the rapid development of mesoscale cyclone is closely related with the spread downward of disorder moist potential vorticity in the higher troposphere.
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引用文本：
王川,寿绍文,2003.一次青藏高原东侧大暴雨过程的诊断分析[J].气象,29(7):7-12.
,2003.A Diagnostic Analysis of Heavy Rain Event in the East Side of Qinghai-Tibet Plateau[J].Meteor Mon,29(7):7-12.
王川,寿绍文,2003.一次青藏高原东侧大暴雨过程的诊断分析[J].气象,29(7):7-12.
,2003.A Diagnostic Analysis of Heavy Rain Event in the East Side of Qinghai-Tibet Plateau[J].Meteor Mon,29(7):7-12.