Revealing the effects of the El Nio-southern oscillation on tropical cyclone intensity over the western north pacific from a model sensitivity study

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• 作者：Yang Zhou (1)
  Jing Jiang (1)
  Youyu Lu (2)
  Anning Huang (1)
  
• 关键词：tropical cyclone intensity ; western North Pacific ; ENSO ; MM5 ; low level vorticity
• 刊名：Advances in Atmospheric Sciences
• 出版年：2013
• 出版时间：July 2013
• 年：2013
• 卷：30
• 期：4
• 页码：1117-1128
• 全文大小：1461KB
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• 作者单位：Yang Zhou (1)
  Jing Jiang (1)
  Youyu Lu (2)
  Anning Huang (1)
  
  1. School of Atmospheric Sciences, Nanjing University, Nanjing, 210093, China
  2. Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, B2Y 4A2, Canada
  
• ISSN：1861-9533

文摘

Five sets of model sensitivity experiments are conducted to investigate the influence of tropical cyclone (TC) genesis location and atmospheric circulation on interannual variability of TC intensity in the western North Pacific (WNP). In each experiment, bogus TCs are placed at different initial locations, and simulations are conducted with identical initial and boundary conditions. In the first three experiments, the specified atmospheric and SST conditions represent the mean conditions of El Nio, La Nia, and neutral years. The other two experiments are conducted with the specified atmospheric conditions of El Nio and La Nia years but with SSTs exchanged. The model results suggest that TCs generated in the southeastern WNP incurred more favorable environmental conditions for development than TCs generated elsewhere. The different TC intensities between El Nio and La Nia years are caused by difference in TC genesis location and low-level vorticity (VOR). VOR plays a significant role in the intensities of TCs with the same genesis locations between El Nio and La Nia years.