气象2017，Vol.43Issue(11)：1309-1325,17.DOI:10.7519/j.issn.1000-0526.2017.11.001
一次双台风影响下暴雨过程的中尺度涡旋模拟分析
Simulation of Mesoscale Vortex During a Heavy Rainfall Process Affected by Typhoons
摘要
Abstract
Numerical simulation is carried out for a heavy rainfall event influenced by two typhoons to study the mesoscale vortex related to the event.The results show that:(1) the rainfall event was jointly influenced by continental high,Typhoon Fitow and Typhoon Danas.Obvious mesoscale vortex activity was found in the mid-to-lower levels during the event.(2) Vertical vorticities related to the vortex started to develop from the lower level of atmosphere.At first,vorticities concentrated below 850 hPa,and then strengthened upward.Meanwhile,the vortex was growing in size and intensity,and finally became a deep meso-β scale vortex accompanied by closed cyclonic circulation.(3) The terms of horizontal advection,vertical advection,convergence making and tilting of local vorticity tendency had different effects in different times and levels.The convergence making term was the main contributor to the mid-to-lower level vorticity source.The vertical advection term was the main contributor to the upper-level vorticity by transporting lower vorticity to the higher levels.The tilting effect had some influence on the development and movement of the vortex.(4) The latent heating effect of precipitation had important influence on the development and movement of the vortex.It changed thermodynamic condition and stability of the atmosphere.Therefore,it was responsible for the maintenance and development of the convergence and convection term of the local vorticity tendency.关键词
台风暴雨/中尺度低涡/数值模拟敏感性试验/涡度收支Key words
typhoon rainfall/mesoscale vortex/numerical sensitivity experiment/vorticity budget分类
天文与地球科学引用本文复制引用
储海,杨引明,刘梦娟..一次双台风影响下暴雨过程的中尺度涡旋模拟分析[J].气象,2017,43(11):1309-1325,17.基金项目
国家自然科学基金面上项目(41475040)及上海市科委科研计划项目(15dz1207802)共同资助 （41475040）
