摘要
利用四川省5001站气象资料、全球同化系统(GDAS)资料,NCEP再分析资料,基于拉格朗日混合单粒子轨道模型(HYSPLIT4),分析了2020年8月14~17日四川盆地西部特大暴雨的水汽输送情况。结果表明:2020年8月14~17日四川盆地特大暴雨存在明显日变化,夜间降水显著,共出现4次峰值。特大暴雨初期水汽主要来自于孟加拉湾,随着降水过程的持续,阿拉伯海东部、孟加拉湾南部及泰国湾的水汽源源不断地向盆地西部输送。定量分析不同水汽源地的贡献可知孟加拉湾的水汽占主导地位,阿拉伯海次之,泰国湾的水汽贡献最低。
This paper analyzed the water vapor transportation of the heavy rainstorm in western Sichuan Basin during August 14-17,2020 by using meteorological data from a weather station 5001 in Sichuan Province,the global data assimilation system(GDAS),and the reanalysis data from national centers for environmental predication(NCEP).The Lagrange mixed single particle orbit model(HYSPIT4)is used in the analysis.The analysis results show that the heavy rainstorm has obvious diurnal variation,and the precipitation at night is severe with 4 peaks.In the initial stage of the heavy rainstorm,the water vapor mainly came from the Bay of Bengal,and with the precipitation event continues,the water vapor from the eastern Arabian Sea,the southern Bay of Bengal and the Gulf of Thailand was continuously transported to the Sichuan Basin.According to the quantitative analysis of the contribution of different water vapor sources,the Bay of Bengal was the dominant water vapor source,followed by the Arabian Sea,and the Gulf of Thailand was the lowest.
作者
丛芳
曹萍萍
王佳津
肖红茹
王春学
CONG Fang;CAO Ping-ping;WANG Jia-jin;XIAO Hong-ru;WANG Chun-xue(Sichuan Meteorological Observatory,Chengdu 610072,China;Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072,China;Sichuan Climate Centre,Chengdu 610072,China)
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2021年第8期2028-2037,共10页
Resources and Environment in the Yangtze Basin
基金
中国气象局预报员专项(CMAYBY2020-109)
中国气象局创新发展专项(CXFZ2021Z033)子项目:2020年盛夏四川盆地二次致洪暴雨过程分析
高原与盆地暴雨旱涝灾害四川省重点实验室青年专项(SCQXKJQN2020024)。
关键词
拉格朗日
四川
水汽输送
暴雨
水汽路径
Lagrangian
Sichuan
water vapor transmission
rainstorm
water vapor path