摘要: |
应用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日-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,简述本次过程的东北冷涡降水的结构特征,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为后倾结构,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本次降水。(3)水汽主要来源于孟加拉湾和南海,中高层少部分水汽来自西部里海。 |
关键词: 东北冷涡;水汽输送;拉格朗日水汽追踪模式 |
DOI: |
投稿时间:2022-11-23修订日期:2023-04-01 |
基金项目: |
|
Synoptic Analysis of a Northeast Cold Vortex and Characteristics of Water Vapor Channels Based on HYSPLIT4 |
Ma Hong-yan,Jiang Song-lin,Sheng Sheng-wang,Long Ling-yun |
(Cengong County Meteorological Bureau,Cengong;CenGong County Meteorological Bureau,CenGong;DanZhai County Meteorological Bureau,DanZhai) |
Abstract: |
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 to anylyze 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 fectors, jet of high and low layer, the convergence of cold and warm air,water vapor convergence over low layer,commonly causes 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 high-layer are from the western Caspian Sea. |
Key words: Northeast Cold Vortex; Water vapor transportation; HYSPLIT_4 |