Diagnosis of seasonal variations of tropical cyclogenesis over the South China Sea using a genesis potential index

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Diagnosis of seasonal variations of tropical cyclogenesis over the South China Sea using a genesis potential index
	Wang, L ; Pan, XM
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2012
卷号	11 期号:3 页码:267-278
关键词	tropical cyclone seasonal variation South China Sea monsoon GP index
ISSN号	1672-5182
通讯作者	wanglei.hkust@gmail.com
中文摘要	This study examines the seasonal variations of tropical cyclogenesis over the South China Sea (SCS) using a genesis potential (GP) index developed by Emanuel and Nolan. How different environmental factors (including low-level vorticity, mid-level relative humidity, vertical wind shear, and potential intensity) contribute to these variations is investigated. Composite anomalies of the GP index are produced for the summer and winter monsoons separately. These composites replicate the observed seasonal variations of the observed frequency and location of tropical cyclogenesis over the SCS. The degree of contribution by each factor in different regions is determined quantitatively by producing composites of modified indices in which only one of the contributing factors varies, with the others set to climatology. Over the northern SCS, potential intensity makes the largest contributions to the seasonal variations in tropical cyclogenesis. Over the southern SCS, the low-level relative vorticity plays the primary role in the seasonal modulation of tropical cyclone (TC) genesis frequency, and the vertical wind shear plays the secondary role. Thermodynamic factors play more important roles for the seasonal variations in tropical cyclogenesis over the northern SCS, while dynamic factors are more important in the seasonal modulation of TC genesis frequency over the southern SCS.
学科主题	Oceanography
语种	英语
WOS记录号	WOS:000306953300002
公开日期	2013-08-28
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10129]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Wang, L,Pan, XM. Diagnosis of seasonal variations of tropical cyclogenesis over the South China Sea using a genesis potential index[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2012,11(3):267-278.
APA	Wang, L,&Pan, XM.(2012).Diagnosis of seasonal variations of tropical cyclogenesis over the South China Sea using a genesis potential index.JOURNAL OF OCEAN UNIVERSITY OF CHINA,11(3),267-278.
MLA	Wang, L,et al."Diagnosis of seasonal variations of tropical cyclogenesis over the South China Sea using a genesis potential index".JOURNAL OF OCEAN UNIVERSITY OF CHINA 11.3(2012):267-278.