摘要
对南通地区1991—2003年强对流天气气候特征进行了统计分析;将强对流天气的大范围环流形势作了分型和总结;利用常规观测资料和1°×1°的NCEP再分析资料,通过MM5V3.7高分辨率数值模拟结果,对典型个例进行了分析研究。结果表明:有利的天气系统影响,大气不稳定能量的累积和释放是强对流天气形成的关键条件之一。利用数值模拟结果计算的有效位能、强天气威胁指数等对强对流天气都具有很好的指示意义。
The climate features of severe convective weather in Nantong district is analyzed based on the historical data from 1991 to 2003. The weather situations are divided into four types. By using the NCEP1°×1° reanalysis data and mesoscale numerical model MM5V3.7 some cases of the severe weather processes are simulated . The results showed that the favorable situation and atmospheric instability are one of the key conditions. The CAPE, SWEAT indexes are the good indicators for severe convective weather.
出处
《气象科学》
CSCD
北大核心
2009年第3期362-367,共6页
Journal of the Meteorological Sciences
基金
国家自然科学基金项目(40875025、40875030、40775033)
上海自然科学基金项目(08ZR1422900)
关键词
强对流
天气型
数值模拟
能量分析
Severe convective weather Synoptic situation Numerical simulation Energy analysis
