INSTABILITY OF SYMMETRIC TYPHOON CIRCULATION AND ADAPTIVE OBSERVATION

This study presents a new way to identify the sensitive areas, which are determined by invoking the negative anomalies of moist potential vorticity (MPV) for typhoon adaptive observations. It is found that the areas of negative MPV are the symmetric instability areas and can be taken as sensitive areas for typhoon adaptive observations. Three typhoons in 2008, Nuri, Fung-wong, and Fengshen, were simulated with the help of MM5 model. It is shown that these typhoons are well simulated in the first 12 hours. Based on these investigations, the calculations of MPV are carried out sequentially. The result shows that the negative maxima of MPV are always around the typhoon eyes for all the cases, which means that the sensitive areas are also near them all the time.

作 者： GAO Shou-ting ZHOU Fei-fan LIU Li-ping   作者單位： GAO Shou-ting,ZHOU Fei-fan(Laboratory of Cloud-Precipitation Physics and Severe Storms,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 China)

LIU Li-ping(State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081 China) 

刊 名： 熱帶氣象學報（英文版）  英文刊名： JOURNAL OF TROPICAL METEOROLOGY  年，卷(期)： 2009 15(2)  分類號： P433  關鍵詞： typhoon   moist potential vorticity (MPV)   instability   sensitive areas  

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