一次台风远距离暴雨水汽条件及输送过程研究  

ON THE WATER VAPOR CONDITION AND MOISTURE TRANSPORT FOR A RAIN CAUSED BY A REMOTE TROPICAL CYCLONE

作　　者：单磊[1,2] 谭桂容[1] 姚叶青[3] 王咏青[1] 

机构地区：[1]南京信息工程大学/气象灾害省部共建教育部重点实验室,江苏南京210044 [2]蚌埠市气象局,安徽蚌埠233040 [3]安徽省气象台,安徽合肥230061

出　　处：《热带气象学报》2014年第2期353-360,共8页Journal of Tropical Meteorology

基　　金：国家重点基础研究发展计划(2009CB421503);国家公益性行业专项(GYHY20120616)共同资助

摘　　要：利用NCEP FNL分析资料,结合HYSPLIT轨迹模式对2012年8月26日发生在黄淮地区的一次台风远距离暴雨过程的水汽条件及输送过程进行分析。结果表明:产生暴雨的水汽来自黄海上空,水汽输送高度主要在700 hPa以下;强降水发生时水汽净流入较大,而降水发生前和降水结束后均呈现净流出;从水汽通道空气块的运动轨迹来看,水汽是在台风环流和副热带高压环流的共同引导下从东部进入暴雨区。气块在通过黄海上空贴近海面运行时所吸收的水汽是这次过程的主要水汽来源。Using the HYSPLIT trajectory model and in combination with NCEP FNL analysis data, this work analyzes a process of heavy rain in the Yellow River-Huaihe River region caused by a remote tropical cyclone on August 26, 2012. In this process the water vapor was transported from the Yellow Sea area mainly below the level of 700 hPa. When the heavy rain occurred the water vapor was net inflow, but before and after the precipitation process the water vapor was net outflow. Under the joint guidance of the circulation of the typhoon and subtropical high, the water vapor was transferred from the east into the heavy rain area, as indicated by the motion trajectory of air parcels in a channel of water vapor. The water vapor absorbed by air parcels moving over the surface of the Yellow Sea is the main source of water vapor in this process.

关 键 词：天气学 台风远距离暴雨 水汽输送 空气质点轨迹 HYSPLIT-4模式 

分 类 号：P426.62[天文地球—大气科学及气象学]