Identification and analysis of high-frequency oscillations in the eyewalls of tropical cyclones

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• 作者：Shumin Chen (1) (2)
  Youyu Lu (3)
  Weibiao Li (1)
  Zhiping Wen (1)
  
  1. Department of Atmospheric Sciences ; Sun Yat-Sen University ; Guangzhou ; 510275 ; China
  2. State Key Laboratory of Tropical Oceanography ; South China Sea Institute of Oceanology ; Chinese Academy of Sciences ; Guangzhou ; 510301 ; China
  3. Bedford Institute of Oceanography ; Fisheries and Oceans Canada ; Dartmouth ; Nova Scotia ; B2Y 4A2 ; Canada
  
• 关键词：tropical cyclone ; high ; frequency oscillations ; eyewall ; intensity
• 刊名：Advances in Atmospheric Sciences
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：32
• 期：5
• 页码：624-634
• 全文大小：1,956 KB
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• 刊物主题：Atmospheric Sciences; Meteorology; Geophysics/Geodesy;
• 出版者：Springer Berlin Heidelberg
• ISSN：1861-9533

文摘

High-frequency oscillations, with periods of about 2 hours, are first identified by applying wavelet analysis to observed minutely wind speeds around the eye and eyewall of tropical cyclones (TCs). Analysis of a model simulation of Typhoon Hagupit (2008) shows that the oscillations also occur in the TC intensity, vertical motion, convergence activity and air density around the eyewall. Sequences of oscillations in these variables follow a certain order.