一次东北冷涡的天气学分析及基于HYSPLIT_4模式的水汽通道特征  

Synoptic Analysis of a Northeast Cold Vortex and Characteristics of Water Vapor Channels Based on HYSPLIT_4

作　　者：马洪燕 蒋松林 盛升旺 龙凌云 MA Hongyan;JIANG Songlin;SHENG Shengwang;LONG Lingyun(Cengong County Meteorological Bureau of Guizhou Province,Cengong 557800,China;Danzhai County Meteorological Bureau of Guizhou Province,Danzhai 557500,China)

机构地区：[1]贵州省岑巩县气象局,贵州岑巩557800 [2]贵州省丹寨县气象局,贵州丹寨557500

出　　处：《中低纬山地气象》2023年第4期1-10,共10页Mid-low Latitude Mountain Meteorology

摘　　要：该文基于拉格朗日方法的水汽追踪模式(HYSPLIT_4)后向追踪2016年7月23—29日东北冷涡降水过程的水汽输送及来源情况,结合高低空环流形势及物理量场的分析,简述此次过程中东北冷涡的结构特征。结果表明:(1)东北冷涡发生发展过程中,雨带逐渐呈现东北—西南走向,并向东移动。(2)高低空的影响系统在垂直方向上呈后倾结构,高低空急流的配置、冷暖平流的交汇及低层水汽的辐合上升运动造成此次降水。(3)水汽主要来源于孟加拉湾和南海,中层少部分水汽来自西部里海。Based on the HYSPLIT_4,this paper tracks the water vapor transport and the source of a Northeastern Cold Vortex precipitation from July 23 to 29,2016,and analyze the structural characteristics of this process by combining the analysis of high and low circulation and physical field.The results showed that:(1)when the Northeastern Cold Vortex is developing,the rain belt shows northeast-southwest direction,and moves eastward.(2)Impact system of high and low layer is a backward structure in vertical direction.Three factors,jet of high and low layer,the convergence of cold and warm air,water vapor convergence over low layer,commonly cause the precipitation.(3)Water vapor are mainly from the Bay of Bengal and the South China Sea,meanwhile,a small part of the water vapor over middle-layer are from the western Caspian Sea.

关 键 词：东北冷涡 水汽输送 拉格朗日水汽追踪模式 

分 类 号：P458.121[天文地球—大气科学及气象学]