热带气旋影响下江苏强对流天气指数分析  

ANALYSIS OF SEVERE CONVECTION INDICES ABOUT SEVERE CONVECTIVE WEATHER UNDER THE INFLUENCE OF TROPICAL CYCLONES IN JIANGSU

作　　者：杨程[1,2] 宋金杰[1] 王元[1] 曾明剑[3] 

机构地区：[1]南京大学中尺度灾害性天气教育部重点实验室,江苏南京210093 [2]浙江省气象科学研究所,浙江杭州310004 [3]江苏省气象科学研究所,江苏南京210008

出　　处：《热带气象学报》2014年第3期559-566,共8页Journal of Tropical Meteorology

基　　金：国家自然科学基金项目(41275057);国家重点基础研究发展计划(973计划)(2009CB421502);财政部公益性行业专项(GYHY2009 06003;GYHY200906011;GYHY201106004);中国气象局气象新技术推广项目(CMATG2010M12)共同资助

摘　　要：利用10年资料(2001—2010年)对热带气旋影响下的江苏地区强对流天气的发生规律进行统计,发现在各类强对流天气中,短时强降水天气发生频率最高,其次是雷雨大风天气,一般雷暴很少发生,龙卷和冰雹天气从未发生。统计结果还表明,在这10年中共有21个热带气旋影响江苏地区,多数热带气旋处于向热带低压减弱的阶段。通过对相关个例进行强对流指数研究发现,这些指数的阈值比以往的研究要小,表明受热带气旋影响更容易造成对流不稳定和低层不稳定能量堆积,最终导致强对流天气发生。Severe convective weather caused by the influence of tropical cyclone （TC） occurred in Jiangsu province was analyzed by various types of severe convective indices during 10 years （2001--2010）. It was found, in such long time series, among all types of the severe convective weather accompanying with TC activities, the events of heavy precipitation typically occurred most frequently, followed by the severe thunderstorm weather. However, the thundered weather without rainfall is rarely happened, and no hail and tornadoes occurred actually. The statistical results also showed that there were 21 landing TCs basically influencing Jiangsu province during 10 years and most of them were on the stage from TC to tropical depression （TD）. The threshold of effectively convective indices of severe convective weather was lower than normal in general, which means that under the influence of TCs, it is more likely to cause convective instability, and the accumulation of instable energy ultimately lead severe convective weather.

关 键 词：热带气旋 强对流 统计 

分 类 号：P445[天文地球—大气科学及气象学]