| 环境场对近海热带气旋突然增强与突然减弱影响的对比分析 |
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| 引用本文： | 黄荣成,;雷小途.环境场对近海热带气旋突然增强与突然减弱影响的对比分析[J].热带气象学报,2010,26(2):129-137. |
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| 作者姓名： | 黄荣成 ;雷小途 |
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| 作者单位： | 1. 中国气象科学研究院,北京,100081;中国气象局上海台风研究所,上海,200030
2. 中国气象局上海台风研究所,上海,200030 |
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| 基金项目： | 国家自然科学基金重点项目"登陆台风强度变化机理研究" |
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| 摘 要： | 采用动态合成分析法对近海突然加强(RITC)和突然减弱(RWTC)两类热带气旋(TC)的环境场进行对比分析。研究表明:(1)两类TC形势场差异较明显,且影响RITC的南亚高压比影响RWTC的南亚高压强。(2)突变前后RITC有充足水汽供应配合较强辐合及上升运动,TC不断获得水汽凝结释放的潜热,使得损耗的能量得到补充和加强,高层辐散突变后减弱,使得TC能量得以保存和聚集,暖心结构被不断增加的潜热能所加强,有利于TC强度的爆发。(3)RWTC突变前后中低层上升运动减弱,中低层辐合变化不大,且由于水汽供应不足,TC获得的凝结潜热不足以补充TC自身的能量损耗,并且高层的上升运动及辐散突变后均加强,这些均有利于TC中心高层暖心热量不断减少,从而促使TC强度快速减弱。
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| 关 键 词： | 天气学 热带气旋 动态合成法 强度 突然增强 突然减弱 |
COMPARATIVE ANALYSIS OF THE INFLUENCE OF ENVIRONMENT FIELD ON RAPID INTENSIFYING AND WEAKENING OF TROPICAL CYCLONES OVER OFFSHORE WATERS OF CHINA |
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| HUANG Rong-cheng,LEI Xiao-tu.COMPARATIVE ANALYSIS OF THE INFLUENCE OF ENVIRONMENT FIELD ON RAPID INTENSIFYING AND WEAKENING OF TROPICAL CYCLONES OVER OFFSHORE WATERS OF CHINA[J].Journal of Tropical Meteorology,2010,26(2):129-137. |
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| Authors: | HUANG Rong-cheng LEI Xiao-tu |
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| Institution: | HUANG Rong-cheng1,2,LEI Xiao-tu2(1.Chinese Academy of Meteorological Sciences,Beijing 10081,China,2.Shanghai Typhoon Institute,CMA,Shanghai 200030,China) |
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| Abstract: | Through a comparative analysis of the influence of environment field on the rapid intensifying and weakening of tropical cyclones over the offshore waters of China by using the dynamic composite analysis technique,our study shows the following results.Firstly,the geopotential height fields of these two types of TCs are dramatically different;the South Asia high which influences the former type of TCs is much stronger than the one which affects the latter type.Secondly,the former type is related to the trans... |
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| Keywords: | synoptics tropical cyclone dynamic compositing method intensity abrupt intensifying abrupt weakening |
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