一次罕见强对流天气过程的成因分析  

Cause Analysis of a Severe Convection Weather Process

作　　者：王宏[1,2] 马凤莲 王万筠[3] 高霞[4] 

机构地区：[1]南京信息工程大学大气科学学院,江苏南京210044 [2]河北省承德市气象局,河北承德067000 [3]天津市塘沽区气象局,天津塘沽300457 [4]河北省保定市气象局,河北保定071000

出　　处：《环境科学与技术》2009年第B12期260-263,共4页Environmental Science & Technology

摘　　要：文章利用常规观测资料，地面加密观测资料、NCEP再分析资料和多普勒雷达资料，对2008年6月25日发生在河北省东北部的罕见强对流天气过程进行了成因分析。结果表明，飑线是此次过程的主要影响系统。暴雨的发生发展与湿位涡的时空演变有很好的对应关系，湿位涡正压项（MPV1）“正负值区垂直迭加”的配置是暴雨发生发展的有利形势，暴雨区发生在850hPa湿位涡正压项的零线附近。多普勒雷达产品分析显示。多普勒雷达是做好强对流天气短时临近预报的最重要工具。Based on the routine-observational data provided by MICAPS,surface data of intensive observation, NCEP reanalysis data and Doppler radar data, a analysis of the severe convection weather event in northeast of Chengde in Hebei province on 25 June 2008 is made. The results show that the squall line is primarily system in the process. The spatial and temporal variations of moist potential vorticity can give good indication for the development of heavy rain. The overlapping of the positive and negative MPV1 area is advantageous to the development and appearance of rainstorm. The rainstorm is located near the zero line of MPV1 at 850hPa. The analysis on Doppler radar products indicate that the Doppler radar is the most important tool for nowcasting severe convection weather.

关 键 词：暴雨 飑线 湿位涡 多普勒雷达 

分 类 号：X16[环境科学与工程—环境科学]