登封2007年春季大到暴雨的特征分析  

Characteristic Analysis of the Rainstorm over Dengfeng in 2007 Spring

作　　者：李慧芳 赵海青[2] 周幸福 李湘慧 李社宗[2] 

机构地区：[1]登封市气象局,河南登封452470 [2]郑州市气象局,郑州450005

出　　处：《气象与环境科学》2008年第3期61-65,共5页Meteorological and Environmental Sciences

摘　　要：利用NCEP提供的再分析资料(Global Final Analyses),对2007年3月3日登封市大到暴雨天气过程从动力和热力条件、水汽输送、湿Q矢量等方面进行分析,结果表明:这次降水过程的两个主要降水时段都出现在次级环流的垂直运动上升区内;暴雨过程中登封上空中低层维持一高能区;温度平流值陡降,导致这次降水过程结束和强降温天气的发生;整个暴雨过程登封维持着通畅的水汽通道和较强的水汽辐合,水汽辐合中心区对应降水集中时段。Based on the final analysis data of NCEP, the rainstorm occurred in Dengfeng on March 3, 2007 is analyzed from the following aspects： dynamic and thermal energy conditions, water-vapor transportation, wet Q vector and so on. The result shows ： two of the main precipitation time interval both appear in the vertical rising area of the secondary circulation; a high energy region maintains in low-altirude layers; the end of precipitation process and occurrence of strong temperature decreasing are caused by sudden drop of temperature advection; unobstructed water vapor channel and strong water vapor convergence maintain over Dengfeng in the whole process, and water vapor convergence central area is corresponding to the main precipitation time interval.

关 键 词：大到暴雨 湿Q矢量 温度平流 假相当位温θse 水汽通量 

分 类 号：P458.121.1[天文地球—大气科学及气象学]