气候变化领域集成服务门户(CCPortal): Modulation of Tropical Cyclone Genesis in the Bay of Bengal by the Central Indian Ocean Mode

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DOI	10.1029/2020JD032641
	Modulation of Tropical Cyclone Genesis in the Bay of Bengal by the Central Indian Ocean Mode
	Li B.; Zhou L.; Wang C.; Gao C.; Qin J.; Meng Z.
发表日期	2020
ISSN	2169897X
卷号	125 期号:12
英文摘要	Tropical cyclones (TCs) can be modified by various processes in the multiscale weather and climate system. In this study, the TC genesis locations are found to shift northward in the Bay of Bengal (BoB) due to the intraseasonal central Indian Ocean (CIO) mode. During the positive phase of the CIO mode, convection center moves from the equator to the BoB. Correspondingly, over the BoB, the updraft transports moisture to the mid-troposphere, and the associated convergence and cyclonic vorticity in the lower troposphere are favorable for TC genesis. The diagnoses on eddy kinetic energy budget indicate that the barotropic energy gain from intraseasonal variabilities nourishes TC genesis over the BoB, which is mainly attributable to the horizontal gradient of zonal winds associated with the enhanced low-level convergence and vorticity during the positive CIO mode. During the negative CIO mode, convection is around the equator. The TC genesis locations shift southward, but the modifications are not significant. The impacts of the CIO mode on TC genesis over the BoB are different from the influences of Madden-Julian Oscillation. Hence, the results are expected to contribute to a comprehensive understanding of the relations between TCs and intraseasonal variabilities over the Indian Ocean. ©2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185964
作者单位	School of Oceanography, Shanghai Jiao Tong University, Shanghai, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China
推荐引用方式 GB/T 7714	Li B.,Zhou L.,Wang C.,et al. Modulation of Tropical Cyclone Genesis in the Bay of Bengal by the Central Indian Ocean Mode[J],2020,125(12).
APA	Li B.,Zhou L.,Wang C.,Gao C.,Qin J.,&Meng Z..(2020).Modulation of Tropical Cyclone Genesis in the Bay of Bengal by the Central Indian Ocean Mode.Journal of Geophysical Research: Atmospheres,125(12).
MLA	Li B.,et al."Modulation of Tropical Cyclone Genesis in the Bay of Bengal by the Central Indian Ocean Mode".Journal of Geophysical Research: Atmospheres 125.12(2020).