气象Issue(6)：697-705,9.DOI:10.7519/j.issn.1000-0526.2014.06.006
卫星水汽通道探测所揭示的高空流场在南亚高压东侧强降水分析中的应用
Application of Upper Troposphere Circulation Revealed by the Satellite IR3 Channel to Heavy Rainfall Events Analysis in the East Side of South Asia High
摘要
Abstract
In eastern China,there is one kind of rainfall that is related to the upper troposphere anticy-clone,i.e.,the South Asian High (SAH).The average heavy rainfall of central-eastern China in annual cycle happens in the northeastern side of the SAH ridge line and shows a quasi-biweekly oscillation in lati-tude when the SAH ridge line shifts northward or southward.The satellite water vapor (WV)images re-veal the atmosphere movement of upper troposphere.The WV image and the derived wind can describe the location of the anticyclone center of upper troposphere and its ridge line and can also trace the downward dry and cold flow from middle-high latitude,which is important to heavy rainfall in summer.The small scale dark area extending southward on WV images is usually the strong potential vorticity area in mid-high latitude,and it can intensify the rainfall when moving to rainfall belt.There are two severe rainfall areas related to the SAH ,one is in the southwest side of the SAH and another is in the northeast side of <br> the SAH where the flow is divergent in the upper troposphere.In the north side of the SAH subtropical westerlies exist when the westerlies are strong,the divergence in the northeast side of the SAH in the up-per levels is strong,which can induce strong precipitation in China.The SAH can affect most of China when it advances and withdraws from early May to early October.As a result,the concept model of the satellite image characteristics which is got from the cases over Huaihe River region in summer can also be used in other seasons or places such as Northwest China and North China regions.The location and shape of the SAH can affect the region and intensity of heavy rainfalls and meanwhile severe precipitation also has feedback on the SAH ,leading the asymmetric instability development of the SAH .关键词
南亚高压/水汽图/云导风/暴雨Key words
South Asian high (SAH)/water vapor image/atmospheric motion vector/heavy rainfall分类
天文与地球科学引用本文复制引用
任素玲,蒋建莹,许健民..卫星水汽通道探测所揭示的高空流场在南亚高压东侧强降水分析中的应用[J].气象,2014,(6):697-705,9.基金项目
公益性行业（气象）科研专项（GHYH200906001）和国家自然科学基金项目（41105028）共同资助 （）
