Large-scale environmental conditions for thunderstorm development
Large-scale environmental conditions for thunderstorm development
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雷暴发展的大尺度环境条件
DOI：
10.1007/bf02678749
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发表时间：
1985
影响因子：
5.8
通讯作者：
C. Shu
中科院分区：
文献类型：
--
作者：
Guoxiang Yang;C. Shu
本文利用1972-1983年选取的40个天气过程研究了雷暴发展的大尺度环境条件。结果表明，中国东部雷暴可分为槽前雷暴和槽后雷暴两种类型。槽前雷暴前的对流不稳定主要由干湿差平流建立，槽后雷暴前的对流不稳定主要由冷暖差平流建立。次天气尺度环流对不稳定的建立和释放有直接影响。槽前雷暴发生在高空斜压波上升运动与低空急流强风核心环流上升分支的重叠区，槽后雷暴发生在急流锋环流上升分支下方的下辐合区。低层干热盖的作用、低层急流和高层急流的耦合作用以及中层急流中的干平流是此次强风暴形成的有利因素。
The large-scale environmental conditions for thunderstorm development have been studied with 40 selected synoptic processes during 1972–1983. It is shown that the thunderstorms in eastern China can be divided into two types: pre-trough and post-trough. The convective instability before the pre-trough thunderstorms is established primarily by the dry and moist differential advection and that before the posttrough thunderstorms by the cold and warm differential advection. The subsynoptic scale circulation has direct effects on the establishment and release of instability. The pre-trough thunderstorms occur in the overlapping region of the ascending motion in the upper baroclinic waves and the ascending branch of the low-level jet strong wind core circulation and the post-trough thunderstorms occur in the lower convergent region below the ascending branch of the jet-front circulation. The effect of the lower dry and warm lids, the coupling of the low-and upper-level jets and the dry advection in the middle-level jet are the favorable factors for the severe storm formation.