江南地面热通量对江淮气旋暴雨影响的模拟研究

被引：12

作者：

翟国庆

高坤

机构：

[1] 杭州大学地理系

来源：

气象学报 | 1997年 / 01期

基金：

浙江省自然科学基金;

关键词：

边界层，地面热通量，江淮气旋，低空急流，暴雨，数值模拟;

D O I：

暂无

中图分类号：

P443 [低气压和温带气旋];

学科分类号：

0706 ; 070601 ;

摘要：

通过对一次江淮气旋暴雨个例的数值模拟，研究地面热通量与大尺度流型结合作用对气旋降水系统的影响。过程前期存在南北两大片地面热通量正值区，北片位于气旋所在处及其前方，南片位于上游低空急流处。模拟比较两片地面热通量的作用发现，前期南片地面热通量，特别是强潜热通量，通过与其上空低空急流的共同作用，对后期下游江淮气旋降水系统的加强起着更为重要的作用。对其机制的初步探讨表明：由地面通量进入低层大气的水汽，通过西南气流向长江中下游输送，改变下游大气的温湿结构，并通过积云对流和层状云雨潜热释放等非绝热过程，促进后期气旋降水系统的发展

引用

页码：56 / 66

页数：11

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