固原市一次暴雨天气过程分析  

Analysis of a Rainstorm Weather Process in Guyuan City

作　　者：马霞 马国涛[1,3] 苏发奋 MA Xia;MA Guotao;SU Fafeng(Key Laboratory for Monitoring,Early Warning and Risk Management of Agrometeorological Disasters in Dry Areas of China Meteorological Administration,Yinchuan 750002,China;Jingyuan Meteorological Bureau,Guyuan 756400,China;Guyuan Meteorological Bureau,Guyuan 756000,China)

机构地区：[1]中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室,宁夏银川750002 [2]泾源县气象局,宁夏固原756400 [3]固原市气象局,宁夏固原756000

出　　处：《宁夏工程技术》2023年第2期97-102,共6页Ningxia Engineering Technology

基　　金：2021年第六批“自治区青年科技人才托举工程”。

摘　　要：利用常规气象资料、NCEP再分析资料、探空资料以及多普勒雷达资料,结合宁夏业务化平台数字预报模式输出产品,对2021年8月18日宁夏固原市暴雨天气过程进行分析,具体包括降水实况、环流背景、物理量场和新一代多普勒雷达等内容。结果表明:此次降水在500 hPa短波槽和700 hPa低涡切变线的有利配合下产生;副热带高压稳定少动是造成这次暴雨天气的主要原因;充足的水汽条件、强烈的上升运动和不稳定层结有利于此次暴雨的发生;多普勒雷达产品组合反射率因子、径向速度、垂直累积液态水含量和垂直风廓线是降水预报、预警的重要判据和指标。Based on the conventional meteorological data,NECP reanalysis data,sounding data and Doppler radar data,combined with the output products of the digital forecast model of Ningxia operational platform,the rainstorm weather process in Guyuan City on August 18,2021 was analyzed from the aspects of precipitation reality,circulation background,physical quantity field and new generation Doppler radar.The results show that the precipitation was generated under the favorable cooperation of 500 hPa shortwave trough and 700 hPa vortex shear line.The stable subtropical high was the main cause of this torrential rain.Sufficient water vapor conditions,strong ascending motion and unstable stratification were conducive to the occurrence of this rainstorm.The composite reflectivity factor,radial velocity,vertically accumulated liquid water content and vertical wind profile of Doppler radar products are important criteria and indexes for precipitation forecast and early warning.

关 键 词：暴雨 副热带高压 多普勒雷达 

分 类 号：P458.3[天文地球—大气科学及气象学]