摘要
本文利用华东中尺度天气试验资料和雷达回波,分析了9例强飑线过程中逐时地面物理量场的变化。提出中尺度散度场的配置及变化与中尺度强对流天气有十分密切的关系,而中尺度扰动辐合强度演变与锋前暖区内的中尺度扰动风场汇合线有关,这些关系往往能预示中尺度强对流天气的出现和发展。有时,在飑线发展的过程中具有中尺度重力波特征。
The change of hourly surface physical parameter fields of nine cases of squall line is analysed in this paper, using the data and radar echoes obtained during East China mesoscale weather experiment. It is indicated that the pattern of mesoscale divergence and its change are closely related to the severe weather. The development of severe convections and variation of mesoscale perturbation convergence are closely related to the confluent lines in the mesoscale perturbation wind field, which may be used as a predictor for the mesoscale severe convective weather. It seems that the feature of mesoscale gravity wave exists in the squall line when it develops.
出处
《大气科学》
CSCD
北大核心
1991年第6期63-69,共7页
Chinese Journal of Atmospheric Sciences
关键词
飑线
对流天气
中尺度
物理特征
Severe convective weather
Characteristics of mesoscale perturbation
Mesoscale analysis.
