2011年3月云南一次寒潮天气过程分析  

Analysis of a Cold Wave Weather Process in Yunnan in March 2011

作　　者：闵颖[1] 李华宏[1] 朱莉[1] 普贵明[1] 

机构地区：[1]云南省气象台,云南昆明650034

出　　处：《成都信息工程学院学报》2013年第1期34-42,共9页Journal of Chengdu University of Information Technology

基　　金：云南省气象局预报员技术开发资助项目(YB201102)

摘　　要：2011年3月15日～18日是一次典型的南支槽与强冷空气相结合的天气过程，此次过程对云南省造成了强降温雨雪天气。为了研究此次天气过程的成因以及为今后类似天气过程提供预报思路，利用6h间隔的NECP1×1再分析资料、常规观测资料和TBB黑体亮温资料，对此次天气过程进行天气学分析和诊断分析。分析结果表明：500hPa高度上中高纬度呈横槽型，横槽与高原东侧的低槽连接，槽后强劲的西北气流为这次寒潮天气过程带来强冷平流；南支槽的东移并加强使暖湿气流不断向云南境内输送；高低层冷暖气流交汇，低层切变线、地面冷锋的持续作用触发r此次降温雨雪天气。This was a typical weather process caused by southern trough and strong cold wave between March 15 and 18, 2011. This event caused cooling-rain-snow weather in Yunnan province. In order to research the reason that caused this process and provide forecasting idea for similar process in future, this process was analyzed based on the NCEP1~ ~ 1~6h interval reanalysis data, daily observation data and black body temperature （TBB） data by synoptic analysis and diagnosis methods. Results showed that there was a transversal trough in middle and high latitude on 500hPa. It tended to breakthrough with the low trough which was in east of plateau. The strong northwest flow be- hind trough brought strong cold advection for this cold wave weather process. The warm and wet flow was transport- ed to Yunnan continuously by the southern trough which developed and moved eastward. Cold and warm flow inter- sected between higher and lower layer. The sustainable effect of shear line at lower layer and surface cold front caused this cooling-rain-snow weather.

关 键 词：气象学 气象与气候 寒潮 南支槽 低温雨雪天气 诊断分析 

分 类 号：P458.122[天文地球—大气科学及气象学]