气候变化领域集成服务门户(CCPortal): Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean

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DOI	10.1007/s00382-020-05577-9
	Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean
	Hari V.; Pathak A.; Koppa A.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-07-08
英文摘要	Variability and trends of the south Asian monsoon at different time scales makes the region susceptible to climate-related natural disasters such as droughts and floods. Because of its importance, different studies have examined the climatic factors responsible for the recent changes in monsoon strength. Here, using observations and climate model experiments we show that monsoon strength is driven by the variations of south Atlantic Ocean sea surface temperature (SASST). The mechanism by which SASST is modulating the monsoon could be explained through the classical Matsuno-Gill response, leading to changes in the characteristics of vertical wind shear in the Arabian Sea. The decline in the vertical wind shear to the warming of SASST is associated with anomalous lower (upper)-level easterlies (westerlies). This further leads to a strong increase in the frequency of the Arabian Sea cyclones; and also prohibits the transport of moisture to the Indian landmass, which eventually reduces the strength of monsoon. The conditions in the SASST which drove these responses are aggravated by greenhouse gas emission, revealing the prominent role played by anthropogenic warming. If, with proper mitigation, these emissions are not prevented, further increases in the SASST is expected to result in increased Arabian sea cyclones and reduced monsoon strength. © 2020, The Author(s).
英文关键词	Arabian Sea cyclones; Indian summer monsoon rainfall; South Atlantic Ocean
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/183329
作者单位	Department of Computational Hydrosystems, Helmholtz Centre for Environmental Research, UFZ, Leipzig, Germany; Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur, India; Hydro-Climate Extremes Lab (H-CEL), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
推荐引用方式 GB/T 7714	Hari V.,Pathak A.,Koppa A.. Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean[J],2021,56(2021-07-08).
APA	Hari V.,Pathak A.,&Koppa A..(2021).Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean.Climate Dynamics,56(2021-07-08).
MLA	Hari V.,et al."Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean".Climate Dynamics 56.2021-07-08(2021).