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大气科学  2006 

02.6梅雨期一次暴雨β中尺度系统结构和演化的数值模拟研究

DOI: 10.3878/j.issn.1006-9895.2006.02.15

Keywords: 梅雨锋暴雨,非线性平衡方程,β中尺度系统

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Abstract:

通过利用观测资料和中尺度数值模拟结果,对2002年6月18~19日("02.6")的一次梅雨锋暴雨β中尺度系统结构和演化及其发展机理进行了研究,分析发现:(1)此次暴雨过程发生在500hPa东亚大槽不断加深发展的阶段,也是中纬度大气长波调整的时期.东亚大槽后的冷空气和副热带高压前缘的暖湿气流在江淮流域交汇为此次暴雨的产生提供了有利的大尺度条件.同时,对流层低层不断加强的西南气流为此次暴雨过程提供了有利的水汽条件.(2)1小时观测的降水量和TBB的分析表明,此次暴雨的产生主要是由于β中尺度对流云团发展分裂

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