2011年6月7-8日平顶山地区高温天气过程的诊断分析  

Diagnostic Analysis of High Temperature Process on June 7-8,2011 in Pingdingshan

作　　者：孟刚 李戈 徐丽娜 

机构地区：[1]平顶山市气象局,河南平顶山467000

出　　处：《气象与环境科学》2012年第2期67-72,共6页Meteorological and Environmental Sciences

基　　金：河南省气象局研究开发项目"沙澧河流域致洪预警系统"(2007pds20071)资助

摘　　要：2011年6月7-8日平顶山市大部分地区出现了40℃以上的高温天气,尤其是8日平顶山地区7个站的自动观测站的最高气温都在40℃以上。利用NCEP再分析资料和常规观测资料对这次极端高温天气进行了分析,结果表明:这次高温天气过程的主要影响系统为700 hPa上的暖脊和地面的暖低压,7-8日平顶山地区天空晴朗,辐射升温对高温天气的出现比较有利;物理量的诊断分析表明,出现高温天气时平顶山地区上空空气干燥并且有强烈的下沉运动和明显的暖平流,下沉增温和平流增温有利于高温天气的出现。It appeared more than 40 ℃ high temperature in the most parts of Pingdingshan on June 7-8, 2011. Especially June 8, the highest temperature of seven automatic stations of Pingdingshan reached 40 ℃. Using NCEP reanalysis and routine sounding data, we analyzed this extreme high temperature process. The results indicate the main influence system of this process is warm ridge at 700 hPa and surface warm low-pressure ; the weather of Pingdingshan is clear on June 7--8, 2011, which is better for emerging of high temperature of Pingdingshan because sun radiation. Diagnostic analysis of physical quantity indicate the upper-air of Pingdingshan is desiccated when high temperature process happened as well as following strong descent of air and obvious warm advection, which are better for emerging of high temperature.

关 键 词：高温天气 高空暖脊 地面暖低压 相对湿度 垂直速度 温度平流 散度 

分 类 号：P458.3[天文地球—大气科学及气象学]