2014年3月28日湖南一次雷雨大风天气过程诊断分析

Diagnostic Analysis of a Thunderstorm and Strong Wind Weather Process in Hunan on March 28, 2014

摘要: 本文利用NCEP再分析资料、TBB资料、MICAPS资料以及雷达拼图资料对发生在2014年3月28日一次雷雨大风过程进行分析，结果表明：高空冷槽与中低层暖温度脊构成的上冷下暖的温度层结为此次强对流天气发生提供了有利的环境条件；湖南地区强对流发生时中低层强烈的上升运动为强对流天气发生提供了有利的动力条件；假相当位温随高度递减为此次强对流天气发生提供了有利的不稳定能量；地面边界层辐合线对强对流天气发生有重要的指示意义；雷达拼图上能明显分析出飑线的回波特征。

Abstract: This article uses NCEP reanalysis data, TBB data, MICAPS data, and radar mosaic data to analyze a thunderstorm and strong wind process that occurred on March 28, 2014. The results show that the temperature layer formed by the upper cold trough and the middle and lower warm temperature ridge provides favorable environmental conditions for the occurrence of this severe convective weather; the strong upward motion in the middle and lower layers during the occurrence of strong convection in the Hunan region provides favorable dynamic conditions for the occurrence of strong convection weather; the deceptive decrease in potential temperature with height provided favorable unstable energy for the occurrence of this severe convective weather; the convergence line of the surface boundary layer has important indicative significance for the occurrence of severe con-vective weather; the echo characteristics of squall lines can be clearly analyzed on the radar mosaic.