气候变化领域集成服务门户(CCPortal): Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May

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DOI	10.1007/s00382-018-4363-4
	Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May
	Huangfu J.; Chen W.; Jian M.; Huang R.
发表日期	2019
ISSN	0930-7575
起始页码	3845
结束页码	3855
卷号	52 期号:2020-07-08
英文摘要	The role of the 50- to 200-hPa zonal wind shear in modulating tropical cyclone (TC) genesis over the western North Pacific (WNP) in May is investigated in this study. Concurrent with the strong cross-tropopause shear over the key region (0°–5°N, 160°–180°E), suppressed convection was observed over the tropical WNP, especially over the South China Sea and the Philippines. The monsoon trough (MT) was confined westward. However, enhanced convection occurred in the weak shear years and the MT extended eastward. This cross-tropopause wind shear is negatively correlated with TC genesis in May, with a decreased (increased) number of TCs corresponding to strong (weak) cross-tropopause wind shear. This cross-tropopause wind shear can be treated as the combined impacts of the El Niño-Southern Oscillation (ENSO) events and the stratospheric quasi-biennial oscillation (QBO). When decaying El Niño events coupled with the easterly phase of the QBO were noted, the cross-tropopause wind shear was stronger with weakened convection, and an enhanced western Pacific subtropical high was observed. TCs are rarely generated during these years. In contrast, the modulation of the QBO westerly phase on decaying La Niña events is limited. Affected by the QBO westerly phase, TC genesis in the May following La Niña events is only slightly enhanced. The energy analysis indicates that the combined impacts of the decaying El Niño events and the QBO easterly phase might suppress the barotropic eddy kinetic energy conversion in May, whereas the decaying La Niña events and the QBO west phase act in an opposite manner. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Cross-tropopause wind shear; ENSO event; Quasi-biennial oscillation; Tropical cyclone genesis; Western North Pacific
语种	英语
scopus关键词	air-sea interaction; convection; cyclogenesis; eddy; El Nino-Southern Oscillation; kinetic energy; quasi-biennial oscillation; tropical cyclone; tropopause; wind shear; Pacific Ocean; Pacific Ocean (North)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146429
作者单位	Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, P.O. Box 2718, Beijing, 100190, China; College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China
推荐引用方式 GB/T 7714	Huangfu J.,Chen W.,Jian M.,et al. Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May[J],2019,52(2020-07-08).
APA	Huangfu J.,Chen W.,Jian M.,&Huang R..(2019).Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May.Climate Dynamics,52(2020-07-08).
MLA	Huangfu J.,et al."Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May".Climate Dynamics 52.2020-07-08(2019).