沙漠与绿洲气象2026，Vol.20Issue(1)：83-90,8.DOI:10.12057/j.issn.2097-6801.2409.09001
河西走廊东部"8·13"暴雨极端性和成因
Extreme Characteristics and Formation Mechanisms during the Rainstorm Process on 13 August 2022 in Eastern Hexi Corridor
摘要
Abstract
Using conventional upper-air and surface observations,hourly precipitation,FY-4A satellite imagery,and ERA5 reanalysis data,we diagnostically analyzed the extremity and meteorological causes of a rainstorm event that occurred on 13 August 2022 in the eastern Hexi Corridor.The results indicate that:(1)The rainstorm was characterized by large accumulated rainfall,strong locality,and pronounced convective activity.The rainband extended from northwest to southeast and was mainly concentrated in Tianzhu County and Gulang County.(2)The daily precipitation at six stations exceeded historical maxima,and three stations recorded record-breaking hourly rainfall.Both the daily precipitation and the duration of short-duration heavy rainfall at Duoshi Town in Tianzhu County exceeded historical records in the eastern Hexi Corridor.(3)The rainstorm occurred under the synergistic influence of multi-scale weather systems,including a mid-to upper-level shortwave trough,a low-level shear line,and a surface cold front.Compared with other historical events,stronger moisture supply,vertical motion,and extremely unstable energy conditions jointly contributed to the extremity of this rainstorm.(4)The development and intensification of multiple convective cells,along with their convergence under topographic influence,directly caused the high rainstorm intensity and prolonged duration.(5)Orographic lifting enhanced upward motion and intensified local convection.关键词
暴雨/极端性/物理量诊断/对流云团Key words
rainstorm/extremity/diagnostic analysis of physical quantities/convective cloud clusters分类
天文与地球科学引用本文复制引用
陈静,杨晓玲,卯生琼,王超..河西走廊东部"8·13"暴雨极端性和成因[J].沙漠与绿洲气象,2026,20(1):83-90,8.基金项目
甘肃省气象局"飞天风云"青年启航人才专项(2025rczx-B-qnqhrc-18) （2025rczx-B-qnqhrc-18）
国家自然科学基金(41975015) （41975015）
