台风“轩岚诺”背景下西藏中东部连阴雨过程分析  

Analysis of continuous overcast rain process in central and eastern Tibet under the background of typhoon“Xuanlanuo”

作　　者：次珍 玉洛 边琼 CI Zhen;YV Luo;BIAN Qiong(Changdu Meteorological Bureau of Xizang,Changdu 854000,China)

机构地区：[1]西藏昌都市气象局,西藏昌都854000

出　　处：《黑龙江环境通报》2025年第3期5-8,共4页Heilongjiang Environmental Journal

基　　金：西藏自治区自然科学基金项目“川藏铁路昌都段气象服务指标建立及应用研究”(XZ202201ZR0009G)。

摘　　要：本文以2022年9月上旬西藏中东部连阴雨天气过程为研究对象,应用NCEP再分析资料和常规地面观测资料,以及Micaps和风廓线雷达资料,从台风形势、环流背景、影响系统、风廓线雷达特征等方面综合分析,结果表明:1)本次降水过程是在超强台风“轩岚诺”的远距离影响下,形成稳定的冷空气和暖湿气流输送条件,而切断低压后部的分裂槽和青海高压与副热带高压单体(23°N、95~105°E)是引导这两股气流的主要影响系统。2)活跃的低涡槽和切变线是造成此次连阴雨天气的直接影响系统。3)ECMWF、GRAPES-GFS模式检验发现两者预报强降水落区、降水集中时段、降水中心有很好的指示意义。This study investigates the continuous overcast rain weather process in central and eastern Tibet in early September 2022.It employs NCEP reanalysis data,conventional ground observation data,Micaps,and wind profiler radar data to analyze the typhoon situation,circulation background,influence systems,and wind profiler radar characteristics comprehensively.The results show that:1)The precipitation process was formed under the long-distance influence of the super typhoon"Xuanlanuo,"creating stable cold air and warm moist air transport conditions.The split trough behind the cutoff low pressure and the Qinghai high and subtropical high monomer(23°N,95-105°E)were the main influence systems guiding these air currents.2)The active vortex trough and shear line were the direct influence systems causing the continuous overcast rain.3)ECMWF and GRAPES-GFS model verification found that both models are indicative for forecasting heavy precipitation areas,precipitation concentration periods,and precipitation centers.

关 键 词：超强台风 环流背景 风廓线雷达 模式检验 

分 类 号：P426.6[天文地球—大气科学及气象学] P434