长白山余脉影响下的极端强降水成因  

Investigation of the Cause of an Extreme Heavy Rainfall Event due to the Impact of Changbai Mountains Remnant

作　　者：李晓婷 王丽[1] 苏畅 王禄禄 宋佳 LI Xiaoting;WANG Li;SU Chang;WANG Lulu;SONG Jia(Tieling Meteorological Bureau,Tieling 112000)

机构地区：[1]铁岭市气象局,辽宁铁岭112000

出　　处：《广东气象》2025年第2期52-57,共6页Guangdong Meteorology

基　　金：辽宁省气象局“东北冷涡背景下短时强降水预报预警技术研究”(ZD202332)。

摘　　要：为开展地形影响下极端强降水的预报、预警提供参考,利用常规观测资料、多普勒天气雷达资料和ERA5再分析资料对2022年8月3日长白山西侧极端强降水成因进行分析,结果表明:副热带高压显著北抬、850hPa形成暖舌向东延申至辽宁西部、水库不断蒸发,为极端强降水自下而上提供充沛水汽;偏西气流被南北向的长白山余脉地形强迫抬升触发生成雷暴,近地面偏东风和冷池出流共同作用使雷暴后向传播;长白山余脉夜间的山风、冷池与周边形成的偏东风和狭管效应形成的偏西风强烈辐合,为八棵树镇带来强降水;偏东风与偏西风势力相当,同时上肥站西侧山脉对雷暴有阻挡作用,使雷暴在上肥站长时间维持,是产生局地极端强降水的重要原因。Based on conventional meteorological observation data,Doppler weather radar data and ERA5 reanalysis data,the cause of an extreme heavy rainfall on the night of August 3,2022 was analyzed.The results are shown as follows.On August 3,the Subtropical High moved northward significantly,and an 850hPa warm tongue extended eastward to the western part of Liaoning.The water in Qinghe and Chaihe reservoirs on the west side of Bakeshu and Shangfei villages kept evaporating,which brought abundant water vapor to the extreme heavy rainfall.The westerly flow was lifted by the north-south-running remnant of the Changbai Mountains,which caused the thunderstorm.East winds and outflows of the cold pool caused the thunderstorm to propagate backward.Nighttime mountain winds converged strongly with the east winds from the cold pool and its surroundings and the west winds formed by the funnelling effect,bringing heavy rainfall to the Bakeshu station.The east and west winds were equal in force,and the mountains on the west side of the Shangfei station blocked the thunderstorm,making the thunderstorm stay over the Shangfei station for extended time.It was an important cause of the local extreme heavy rainfall.

关 键 词：气候学 极端强降水 后向传播 冷池 长白山余脉 

分 类 号：P46[天文地球—大气科学及气象学]