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Identification and analysis of high-frequency oscillations in the eyewalls of tropical cyclones |
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| Authors: | Shumin Chen Youyu Lu Weibiao Li Zhiping Wen |
| Affiliation: | 1. Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology,Chinese Academy of Sciences, Guangzhou 510301 2. Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, Nova Scotia, B2Y 4A2 Canada 3. Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275 |
| Abstract: | 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. |
| Keywords: | tropical cyclone high-frequency oscillations eyewall intensity |
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