台风远距离影响下的短时强降水天气过程分析  

Analysis of Short-term Heavy Precipitation Weather Process Under Distant Influence of Typhoon

作　　者：张顺 Zhang Shun(Jiangxi Air Trafic Control Bureau of CAAC,Nanchang 330100 Jiangxi China)

机构地区：[1]民航江西空管分局,江西南昌330100

出　　处：《中国民航飞行学院学报》2025年第2期43-49,共7页Journal of Civil Aviation Flight University of China

摘　　要：利用昌北机场自动观测资料、常规气象资料、风廓线雷达资料以及NCEP再分析资料,对昌北机场一次短时强降水天气过程进行分析。结果表明,此次短时强降水发生在副高西侧和高空西北气流的背景下,是低空急流、副热带高压、远距离台风、低层辐合、东风扰动等多尺度系统共同作用的结果;降水发生前,江西中北部地区地表受热不均,使得强降水区上空大气出现强的不稳定层结;该区域高空西北气流的辐散作用与低层低空急流出口区的辐合作用相配合,有利于对流天气的发展;副高西南侧东南气流和台风“卡努”北侧偏东气流叠加,形成东风扰动,触发此次强降水天气;台风“杜苏芮”减弱低压环流和台风“卡努”外围偏东气流共同将水汽输送至强降水区域。By using automatic observation data,routine meteorological data,wind profile radar data and NCEP reanalysis data from Changbei Airport,this paper analyzes a short-term heavy precipitation weather process at Changbei Airport.The results show that the short-term heavy precipitation occurred against the background of the western subtropical high airflow and the high-altitude northwest airflow,resulting from the joint effect of multi-scale systems such as low-level jet stream,subtropical high pressure,distant typhoons,low-level convergence and easterly disturbance;Before the occurrence of precipitation,the uneven surface heating in the central and northern regions of Jiangxi results in a strong unstable layer structure in the atmosphere above the heavy precipitation area;The divergence effect of the high-altitude northwest airflow in the region is combined with the convergence effect of the low-level jet stream exit area,which is conducive to the development of convective weather;The southeast airflow on the southwest side of the subtropical high and the easterly airflow on the north side of Typhoon Kanu superimposes,forming an easterly disturbance and triggering this heavy precipitation weather;Typhoon Dussuri weakens the low-pressure circulation and the eastward airflow around Typhoon Kanu jointly transports water vapor to the area of intense precipitation.

关 键 词：远距离台风暴雨 低空急流 东风扰动 

分 类 号：V321.2[航空宇航科学与技术—人机与环境工程]