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《Chinese Journal of Atmospheric Sciences》 2010-01
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The Role of Middle Tropospheric Mesoscale Convective Vortex in the Genesis of Typhoon Durian (2001)——Diagnostic Analysis of Simulated Data

ZHANG Wenlong1, CUI Xiaopeng2, and DONG Jianxi31 Institute of Urban Meteorology, China Meteorological Administration, Beijing 1000892 Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 1000293 National Marine Environment Forecast Center, Beijing 100081  
Based on the successful numerical simulation of typhoon Durian (2001) with the PSU/NCAR nonhydrostatic mesoscale model (MM5), the authors diagnose the contributions of middle tropospheric mesoscale convective vortex (MCV) to the Durian’s genesis using the high resolution data (6 km) produced by MM5. The results show that the MCV have three important performances. First, playing the role of mesoscale organization system, the second vertical cycle of MCV transports the convective hot towers to the central area of MCV, making the hot towers have the trend to contest or merge each other, so that some hot towers become stronger or died. The feedback of the collective effect of hot towers makes the MCV intensify or maintain, and the MCV further pushes the assembling, merging and axisymmetrization of hot towers. Second, playing the role of memory system, because the MCV have the longer life time than individual hot tower, the MCV can reserve the heat, moisture, and vorticity left by the died hot towers, which will make the MCV area favorable to the TC genesis, and ultimately become the ‘embryo’ of Durian. Third, the MCV, the low tropospheric trough (vortex), and the hot towers conduct together the vertical uniformization between the lower and middle tropospheric systems through their interaction.
【Fund】: 国家重点基础研究发展计划项目2009CB421505;; 国家“十一五”科技支撑项目2006BAD20B0310
【CateGory Index】: P458.124
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【Citations】
Chinese Journal Full-text Database 3 Hits
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3 ZHANG Wen-long1,CUI Xiao-peng2,WANG Ang-sheng2,ZONG Zhi-ping3 (1.Institute of Urban Meteorology,China Meteorological Administration,Beijing 100089,China;2.Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;3.National Meteorological Centre,CMA,Beijing 100081,China);NUMERICAL SIMULATION OF HOT TOWERS DURING PRE-GENESIS STAGE OF TYPHOON DURIAN(2001)[J];Journal of Tropical Meteorology;2008-06
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