局地强对流天气分析中非常规探测资料应用  

Application of Non-Conventional Observational Data to Local Heavy Rain Analysis

作　　者：郑祚芳[1] 刘红燕[1] 张秀丽 

机构地区：[1]中国气象局北京城市气象研究所,北京100089 [2]空军气象中心,北京100843

出　　处：《气象科技》2009年第2期243-247,260,共6页Meteorological Science and Technology

基　　金：中央级公益性科研院所基本科研业务专项(IUMKY200705);科技部公益研究专项(GYHY200706004);科技部奥运科技专项(2005BA904B05);北京市科委科技奥运专项(Z0006279040191)资助

摘　　要：应用多种非常规观测资料对2006年6月27日夜间北京地区一次局地强对流天气过程进行了分析。结果表明:直接造成此次暴雨过程的天气系统是两个局地生成的中尺度对流云团,地面中尺度辐合线是降水主要触发机制之一,城市热岛效应为强对流天气的发生提供了有利的热力条件。微波辐射计观测量对降水的发生具有较好的指示意义,液态水含量的急剧增(减)过程,预示着降水即将出现(消亡)。风廓线雷达的连续观测能够部分揭示影响系统的细节特征,从风场配置上可以看到中低层的风切变以及降水前低层的暖平流和小尺度低涡环流,这种系统结构和配置对降水的形成和维持有着重要的意义。By means of several non-conventional observational data, a local severe convective weather even on June 27 2006 in Beijing is studied. The results show that two meso-scale convective cloud clusters and the surface meso-scale convergence line played the triggering role in the heavy rain process, and the urban heat island provided the thermodynamic condition. The measurements of the ground-based 12-channl microwave radiometer have good indicative significance to the occurrence of heavy rainfall. The rapid increase （decrease） of Liquid Water Content can be used as an indicator in forecasting the beginning （ending） of heavy rainfall. The continuous observation data from wind profile radar can provide detailed information about a convective system partly, such as the lower- and middle-level wind shears, warm advection, and small-scale low-pressure systems, which are of significance to the formation and maintenance of heavy rainfall.

关 键 词：局地强降水 非常规探测资料 微波辐射计 风廓线雷达 

分 类 号：P458.12[天文地球—大气科学及气象学] TU723.3[建筑科学—建筑技术科学]