四川“8.11”暴雨的视热源和视水汽汇特征分析  

Characteristics of Apparent Heat Source and Apparent Moisture Sink of"8.11"Rainstorm in Sichuan

作　　者：张军辉 唐细坝[2] 彭静[3] ZHANG Junhui;TANG Xiba;PENG Jing(Meteorological Center of Southwest Air Traffic Management Bureau,Chengdu 610202,China;Laboratory of Cloud-Precipitation Physics and Severe Storms,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Key Laboratory of Regional Climate and Environment for Temperate East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]西南空管局气象中心,成都610202 [2]中国科学院大气物理研究所云降水物理与强风暴重点实验室,北京100029 [3]中国科学院大气物理研究所东亚区域气候环境重点实验室,北京100029

出　　处：《高原山地气象研究》2023年第1期43-53,共11页Plateau and Mountain Meteorology Research

基　　金：国家自然科学基金面上项目(421705013)。

摘　　要：基于NCEP再分析资料与WRF-ARW高分辨数值模拟资料,利用视热源和视水汽汇方程,诊断分析了2020年8月10~12日四川盆地一次暴雨过程的大气热力和降水特征。结果表明:暴雨发生初期,对流中低层聚集了大量水汽,为暴雨来临准备了丰富的水汽;暴雨强盛时期,视热源和视水汽汇在对流中高层显著增加,使得对流层中高层出现深厚的加热和加湿层,表明此次降水积云对流活跃,以对流性降水为主;暴雨发生发展过程,视热源和视水汽汇中垂直项起主要作用,充分说明了强烈的上升运动可以带来丰沛的水汽,有利于暴雨的发生发展。Based on the reanalysis data of NCEP and high-resolution numerical simulation data of WRF-ARW,the characteristics of atmospheric heat and precipitation during the heavy rain in Sichuan Basin from August 10 to 12,2020 were diagnosed and analyzed by using the atmospheric apparent heat source and apparent moisture sink equation.The results show that at the beginning of the rainstorm,a large amount of water vapor collected in the middle and bottom layer of the convection,which was rich in water vapor for the coming of the rainstorm.At the time of rainstorm,the apparent heat source and apparent moisture sink increased significantly in the middle and upper layers of convection,resulting in deep heating and humidification layer in the middle and upper layers of troposphere,which indicated that the cumulus convective cloud was active and the convective precipitation was the main precipitation.At the same time,it was found that the vertical term played a major role in the occurrence and development of rainstorm by decomposing atmospheric apparent heat source and apparent moisture sink,which fully demonstrated that the strong upward movement could bring abundant water vapor,which was beneficial to the development of rainstorm.

关 键 词：WRF-ARW 视热源 视水汽汇 暴雨 

分 类 号：P425.23[天文地球—大气科学及气象学]