基于HYSPLIT的金华梅汛期暴雨水汽路径和源地分析  

Analysis of Water Vapor Path and Source of Rainstorm in Jinhua Meiyu Flood Season Based on HYSPLIT

作　　者：李悦 丁霖 曾文全 季雨婕 Li Yue(Wucheng District Meteorological Bureau,Jinhua City,Wucheng,Zhejiang 321000)

机构地区：[1]金华市婺城区气象局,浙江婺城321000

出　　处：《农业灾害研究》2023年第6期91-93,共3页Journal of Agricultural Catastrophology

摘　　要：基于国家和区域自动气象站逐日降水资料、全球同化系统(GDAS)资料、ERA5再分析资料,引入拉格朗日混合单粒子轨道模型HYSPLIT分析了金华市2015—2020年9次梅汛期暴雨天气过程中的水汽特征。结果表明:梅汛期暴雨在500 m高度上的水汽输送路径有4条,分别为偏南路径、偏西至偏南短距离路径、偏东路径和西南路径,对应的水汽源地南海北部贡献率最大,为44.38%,其次是浙江上游周边地区,贡献率为26.96%;在1500 m高度上水汽输送路径有3条,分别为西南路径、偏南路径和偏西路径,对应的水汽源地孟加拉湾西部贡献率最大,为45.04%,其次是南海北部,贡献率为38.08%;在3000 m高度上水汽输送路径有3条,分别为西南路径,偏西路径和偏南路径,对应的水汽源地老挝附近海面贡献率最大,为67.80%。对于不同的起始追踪高度,水汽的输送大部分都集中于低层,随着高度的增加,水汽输送路径会顺时针旋转。Based on the daily precipitation data of national and regional automatic weather stations,the global assimilation system(GDAS)data,and the ERA5 reanalysis data,the Lagrangian mixed single particle orbit model HYSPLIT was introduced to analyze the water vapor characteristics of nine rainstorm weather processes during the Meiyu flood season in Jinhua from 2015 to 2020.The results show that there were four water vapor transport paths at the height of 500m for the rainstorm during the Meiyu flood season,namely,the southward path,the westward southward short distance path,the easterly path and the southwest path.The contribution rate of the corresponding water vapor source in the northern South China Sea was 44.38%,followed by the surrounding areas in the upstream of Zhejiang Province,with a contribution rate of 26.96%;At the height of 1500m,there were three water vapor transport paths,namely,the southwest path,the southerly path and the westerly path.The corresponding water vapor source,the west of the Bay of Bengal,had a maximum contribution rate of 45.04%,followed by the north of the South China Sea,with a contribution rate of 38.08%;At the height of 3000m,there were three water vapor transport paths,namely,the southwest path,the west path and the south path.The maximum contribution rate of the corresponding water vapor source near Laos was 67.80%.For different initial tracking heights,most of the water vapor transport was concentrated in the lower layer.With the increase of height,the water vapor transport path will rotate clockwise.

关 键 词：HYSPLIT 水汽输送路径 水汽源地 

分 类 号：P458.1[天文地球—大气科学及气象学]