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学科主题: Oceanography
题名: Modulation of tropical cyclogenesis over the South China Sea by ENSO Modoki during boreal summer
作者: Wang, L ; Guo, ZL
通讯作者: wanglei.hkust@gmail.com
关键词: tropical cyclone ; South China Sea ; ENSO Modoki ; genesis potential index
刊名: JOURNAL OF OCEAN UNIVERSITY OF CHINA
发表日期: 2014
卷: 13, 期:2, 页:x
收录类别: sci
部门归属: [Wang Lei] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Wang Lei ; Guo Zhiliang] Sun Yat Sen Univ, Sch Environm Sci & Engn, Dept Atmospher Sci, Guangzhou 510275, Guangdong, Peoples R China
项目归属: LTO
资助者: Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11010000]; National Natural Science Foundation of China [41205026]; National Basic Research Program of China [2011CB403500]; Innovation Group Program of State Key Laboratory of Tropical Oceanography [LTOZZ1201]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201208]; foundation for returned scholars of Ministry of Education of China; specialized research fund for the doctoral program of Higher Education for Youths; foundation of Guangdong Educational Committee for Youths [2012 LYM_0008]; Key Laboratory of Ocean Circulation and Waves of Chinese Academy of Sciences [KLOCAW1309]
摘要: This study examines the modulation of tropical cyclogenesis over the South China Sea (SCS) by the El Nio-Southern Oscillation (ENSO) Modoki during the boreal summer. Results reveal that there were more tropical cyclones (TCs) formed over the SCS during central Pacific warming years and less TC frequency during central Pacific cooling years. How different environmental factors (including low-level relative vorticity, mid-level relative humidity, vertical wind shear, and potential intensity) contribute to this influence is investigated, using a genesis potential (GP) index developed by Emanuel and Nolan. Composite anomalies of the GP index are produced for central Pacific warming and cooling years separately, which could account for the changes of TC frequency over the SCS in different ENSO Modoki phases. The degree of contribution by each factor is determined quantitatively by producing composites of modified indices in which only one of the contributing factors varies, with the others set to climatology. The results suggest that the vertical wind shear and low-level relative vorticity, which are associated with the ENSO Modoki-induced anomalous circulations in Matsuno-Gill patterns, make the largest contributions to the ENSO Modoki modulation of tropical cyclogenesis over the SCS as implied by the GP index. These results highlight the important roles of dynamic factors in the modulation of TC frequency over the SCS by the ENSO Modoki during the boreal summer.
原文出处: 查看原文
WOS记录号: WOS:000330312700007
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10562
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Wang, L; Guo, ZL.Modulation of tropical cyclogenesis over the South China Sea by ENSO Modoki during boreal summer,JOURNAL OF OCEAN UNIVERSITY OF CHINA,2014,13(2):x
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