中尺度地形对湘西州强降水影响的研究  

Investigation of Extreme Flash-Rain Events in Xiangxi on the Impact of Meso-Scale Terrain

作　　者：黄蕴璞 张金凯 刘二影 彭钰媛 Huang Yun-pu(Jishou Meteorological Bureau of Hunan Province,Jishou,Hunan 416000)

机构地区：[1]湖南省吉首市气象局,湖南吉首416000 [2]湖南省湘西土家族苗族自治州气象局,湖南吉首416000 [3]湖南省湘潭市气象局,湖南湘潭411100

出　　处：《农业灾害研究》2023年第7期114-116,共3页Journal of Agricultural Catastrophology

摘　　要：利用WRF-ARW 4.4版中尺度模式就2021年6月27日湘西自治州暴雨过程进行模拟研究,主要考察中尺度地形对暴雨范围、落区和中心强度的影响。在敏感性试验中,不改变大尺度环境的各要素场,将湘西州及紧邻区域的海拔高度降至200 m。数值试验的结果表明,中尺度地形的改变,使敏感性试验区域的暴雨中心的位置和强度都发生了变化,中尺度地形是形成中尺度扰动的一种外力,在对局地的地形进行“消除”后,带来中尺度扰动的外力也不再存在。The numerical modeling was conducted in this paper on investigation of the effects of meso-scale terrain on precipitation of torrential rain in Xiangxi of Hunan Province on June 27,2021 by means of WRF-ARW(ver4.4).The elevation of Xiangxi was cut down to round about 200 m above sea level intentionally in the model topography.The outcomes of the numerical experiment revealed the fact that the topographical change of model results in the variation of the range and intensity of the meso-scale heavy-rain center.Meso-scale terrain is a kind of external force which forms mesoscale disturbance,after“Erasing”the local terrain,the external forces are no longer exist.

关 键 词：短时强降水 中尺度地形 模式地形 数值模拟 

分 类 号：P458.121.1[天文地球—大气科学及气象学]