本文已被：浏览 1054次 下载 1309次
中文摘要: 利用哈尔滨站的飑线资料和常规高空、地面观测资料，对冷涡过程中的飑线从天气尺度环流背景、大尺度动力条件和中尺度天气系统等几个方面进行了分析。结果指出：①飑线发生在冷涡发展较强阶段，②飑线发生在冷涡温压场结构不对称性较强的锋区上，③层结不稳定、低层水汽输送与辐合、强烈的上升运动等是必要的天气尺度条件，④地面上有明显的中尺度系统，⑤飑线发生时天气尺度动能明显向中尺度系统转换。
中文关键词: 冷涡，飑线，中尺度
Abstract:Squall lines which occurred in cold vortexes over Northeast China were analyzed by using data observed at the Harbin weather station and other data sets. The results show that ① The squall lines mostly occurred when the cold vortexes developed strongly and were over the front regions,which had thermodynamically unstable structure. ② There are basically three necessary conditions for the occurrence of squall lines,i.e. unstable thermodynamically structure,convergence of water vapor in the low levels and strong convection.③ A mesoscale weather system occurred near surface. ④ The synoptic scale kinetic energy was transferred to the mesoscale system when the squall lines enhanced.
keywords: cold vortex,squall line,mesoscale system
文章编号： 中图分类号： 文献标志码：
基金项目:中国气象局“东北冷涡研究”项目
| Author Name | Affiliation |
引用文本：
白人海,谢安,1998.东北冷涡过程中的飑线分析[J].气象,24(4):37-40.
,1998.Analysis of squall lines occurrign in cold vortexes over Northeast China[J].Meteor Mon,24(4):37-40.
白人海,谢安,1998.东北冷涡过程中的飑线分析[J].气象,24(4):37-40.
,1998.Analysis of squall lines occurrign in cold vortexes over Northeast China[J].Meteor Mon,24(4):37-40.