气候变化领域集成服务门户(CCPortal): Drivers and mechanisms of heatwaves in South West India

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DOI	10.1007/s00382-024-07242-x
	Drivers and mechanisms of heatwaves in South West India
	Dalal, Ganaraj; Pathania, Tinesh; Koppa, Akash; Hari, Vittal
发表日期	2024
ISSN	0930-7575
EISSN	1432-0894
英文摘要	Under global warming, heatwaves over India are projected to increase unequivocally. Thus, understanding the causal mechanisms responsible for heatwaves adds immense value to the country's climate change mitigation and adaptation strategies. Although several studies have attempted to understand the physical mechanisms responsible for such events, efforts focusing on South-West India (SWI) are lacking. Here, using long-term observational data (1951-2020) and climate model simulations, we show that the heatwaves over SWI are influenced by major climatic modes, including El Ni & ntilde;o-Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO), and the Indian Ocean Dipole (IOD). The mechanism through which these climatic modes affect the SWI heatwaves is either by weakening of Pacific Walker circulation (ENSO and PDO) or by strengthening the Indian Ocean Hadley circulation (IOD). Further, we found that amongst these climatic modes, PDO explains the majority of the heatwave variability followed by IOD. However, post-1979, the scenario has changed remarkably with ENSO gaining prominence, signifying the strengthening of the relationship between ENSO and SWI heatwaves in the recent past. Overall, our study provides a first insight into the drivers and mechanism of the SWI heatwaves, whose value to designing heatwave adaptation strategies over the ecologically sensitive region can hardly be overemphasised.
英文关键词	South-West India; Heatwave; ENSO; PDO; IOD
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001218889200002
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/295876
作者单位	Indian Institute of Technology System (IIT System); Indian Institute of Technology (Indian School of Mines) Dhanbad; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne
推荐引用方式 GB/T 7714	Dalal, Ganaraj,Pathania, Tinesh,Koppa, Akash,et al. Drivers and mechanisms of heatwaves in South West India[J],2024.
APA	Dalal, Ganaraj,Pathania, Tinesh,Koppa, Akash,&Hari, Vittal.(2024).Drivers and mechanisms of heatwaves in South West India.CLIMATE DYNAMICS.
MLA	Dalal, Ganaraj,et al."Drivers and mechanisms of heatwaves in South West India".CLIMATE DYNAMICS (2024).