达州“8.8”特大暴雨过程水汽输送特征分析  

Analysis of Water Vapor Transport Characteristics in"8.8"Torrential Rain in Dazhou

作　　者：罗贵东 甘丛槐 肖月鹏 谢静 LUO Guidong;GAN Conghuai;XIAO Peng;XIE Jing(Dazhou Meteorological Service,Dazhou 635000,China;Nanchong Key Laboratory of Strong Weather Research in Northeast Sichuan,Nanchong 637000,China;Xuanhan Meteorological Service,Xuanhan 636150,China)

机构地区：[1]四川省达州市气象局,达州635000 [2]川东北强天气研究南充市重点实验室,南充637000 [3]四川省宣汉县气象局,宣汉636150

出　　处：《高原山地气象研究》2023年第S01期19-25,共7页Plateau and Mountain Meteorology Research

基　　金：川东北强天气研究南充市重点实验室科学技术研究项目(NCQXKJ202201)。

摘　　要：利用常规气象观测资料、全球同化系统(GDAS)资料、NCEP再分析资料,基于HYSPLIT4模型,分析了2021年8月8日达州特大暴雨的水汽输送情况。结果表明:(1)此次极端暴雨天气过程中,环流背景和西南涡的位置、强度和移动速度等均利于暴雨的发生,达州南部的渠县、大竹为水汽辐合的大值中心。(2)不同高度水汽输送路径和比例不同,水汽输送路径主要有3条:来自阿拉伯海和孟加拉湾的西南路径,来自周边地区的偏南路径以及来自东海和西太平洋的偏东路径(3)东海水汽贡献率最高,周边地区次之,最后是孟加拉湾和阿拉伯海。Using the conventional meteorological observation data,global assimilation system(GDAS)data and NCEP reanalysis data,based on HYSPLIT 4 model,the water vapor transport of the torrential rain in Dazhou on August 8,2021 is analyzed.The results show that:(1)During the extreme rainstorm process,the atmospheric circulation and the location,intensity and moving speed of southwest vortex are conducive to the occurrence of rainstorm.Quxian and Dazhu are at the high value center of water vapor convergence.(2)The water vapor transport paths and proportions are different at different heights.There are three main water vapor transport paths,the southwest path from the Arabian Sea and the Bay of Bengal,the southerly path from the surrounding areas,the easterly route from the East China Sea and the Western Pacific.(3)The contribution rate of water vapor in the East China Sea is the highest,followed by the surrounding areas,and finally the Bay of Bengal and the Arabian Sea.

关 键 词：极端暴雨 水汽路径 水汽输送 水汽源地 

分 类 号：P458.121[天文地球—大气科学及气象学]