江淮流域一次特大暴雨的数值模拟及动力分析
投稿时间:1993-12-22  修订日期:1995-06-09  点此下载全文
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作者单位
沈桐立 南京气象学院气象学系, 南京 210044 
马林 南京气象学院气象学系, 南京 210044 
温市耕 内蒙古气象台, 呼和浩特 010051 
基金项目:“八五”科技攻关906项目及国家自然科学基金49465013及49335060项目资助
中文摘要:以周晓平研制的有限区域细网格数值模式为基础,编制成一个套网格模式,并对1991年7月2~3日发生在江淮流域的特大暴雨过程,进行了数值模拟和动力分析。结果表明:低空急流加强,输送了大量暖湿空气并激发强烈的上升运动是造成该区暴雨的主要原因;在该过程中,热成风平衡遭到破坏,其非热成风平衡部分伴随相应的二级环流,也有利于垂直运动的产生。
中文关键词:数值模拟  暴雨  非地转风  Q矢量
 
NUMERICAL MODELLING OF JULY 1991 RAINSTORM OVER THE CHANGJIANG-HUAIHE REACHES WITH DYNAMIC ANALYSIS
Abstract:Developed on the basis of the limited-area fine mesh model of Zhou Xiaoping is a nested-grid model by which numerical simulation and dynamic analysis are performed of an exception-ally heavy rain event over the Channgjiang-Huaihe basins during July 2~3, 1991. Results showthat low-level jet is enhanced, transporting large quantities of warm, moist air into the system,which by exciting intense rising, is responsible mainly for the rainstorm, during which thermalwind equilibrium is destroyed and a secondary circulation related to the equilibrium portion of thenonthermal wind favors the occurrence of vertical motion.
keywords:numerical modelling  heavy rain  ageostrophic wind  Q vector
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