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DOI	10.1007/s00382-020-05457-2
	Does the Pacific meridional mode dominantly affect tropical cyclogenesis in the western North Pacific?
	Zhang H.; Wu L.; Huang R.; Chen J.-M.; Feng T.
发表日期	2020
ISSN	0930-7575
起始页码	3469
结束页码	3483
卷号	55
英文摘要	The different impacts of Pacific meridional mode (PMM) and central Pacific (CP) El Niño on tropical cyclone (TC) genesis over the western North Pacific (WNP) in the period of 1965–2018 were investigated in this study. The results show that PMM is mainly related to the eastern subtropical Pacific warming and CP El Niño is mainly related to the central tropical Pacific warming. They have a similar impact on TC genesis over the WNP and more TCs form in the east of the WNP due to the high correlation between the central tropical Pacific warming and eastern subtropical Pacific warming. In the central tropical Pacific, due to the SST forcing of the atmosphere, SST warming leads to the remarkable atmospheric response. In the eastern subtropical Pacific, the variation of the atmosphere precedes SST to establish the SST warming, and the atmospheric response to this SST warming is limited. During the CP El Niño, the anomalous convention associated with the central tropical Pacific warming produces a poleward extension of anomalous westerlies over the WNP by the Matsuno-Gill-type Rossby wave response. Such anomalous westerlies strengthen the monsoon trough (MT) with an eastward shift. The enhanced MT accompanied by the changed large-scale environmental conditions and synoptic-scale perturbations are beneficial to TC genesis over the WNP. However, the PMM with the eastern subtropical Pacific warming has no significant impact on the tropical circulation over the WNP and only a limited effect on the subtropical high. As a result, it has no direct effect on the MT, and the PMM itself has no significant positive correlation with TC genesis over the WNP. However, the impact of the PMM with the central tropical Pacific warming on TC genesis over the WNP is consistent with that during the CP El Niño. These findings suggest the dominant role of the SST warming in the central tropical Pacific on TC genesis over WNP, and the simultaneous impact of PMM on TC genesis over WNP is mainly realized by it. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Central Pacific warming; El Niño–Southern oscillation (ENSO); Pacific meridional mode (PMM); Tropical cyclogenesis
语种	英语
scopus关键词	correlation; cyclogenesis; El Nino-Southern Oscillation; global warming; meridional circulation; oceanic circulation; sea surface temperature; tropical cyclone; Pacific Ocean; Pacific Ocean (Central)
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/145241
作者单位	Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Maritime Information and Technology, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan; College of Oceanography, Hohai University, Nanjing, China
推荐引用方式 GB/T 7714	Zhang H.,Wu L.,Huang R.,et al. Does the Pacific meridional mode dominantly affect tropical cyclogenesis in the western North Pacific?[J],2020,55.
APA	Zhang H.,Wu L.,Huang R.,Chen J.-M.,&Feng T..(2020).Does the Pacific meridional mode dominantly affect tropical cyclogenesis in the western North Pacific?.Climate Dynamics,55.
MLA	Zhang H.,et al."Does the Pacific meridional mode dominantly affect tropical cyclogenesis in the western North Pacific?".Climate Dynamics 55(2020).