气候变化领域集成服务门户(CCPortal): Extreme cold events in Europe under a reduced AMOC

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DOI	10.1088/1748-9326/ad14b0
	Extreme cold events in Europe under a reduced AMOC
	Meccia, Virna L.; Simolo, Claudia; Bellomo, Katinka; Corti, Susanna
发表日期	2024
ISSN	1748-9326
起始页码	19
结束页码	1
卷号	19 期号:1
英文摘要	There is a consensus that a weakened Atlantic Meridional Overturning Circulation (AMOC) decreases mean surface temperature in the Northern Hemisphere, both over the ocean and the continents. However, the impacts of a reduced AMOC on cold extreme events have not yet been examined. We analyse the impacts of a reduced AMOC strength on extreme cold events over Europe using targeted sensitivity experiments with the EC-Earth3 climate model. Starting from a fully coupled ocean-atmosphere simulation in which the AMOC was artificially reduced, a set of atmosphere-only integrations with prescribed sea surface temperature and sea-ice cover was conducted to evaluate the effects of weakly and strongly reduced AMOC strength. Despite overall cooling, reduced AMOC leads to fewer winter cold spells in Europe. We find that the weakened AMOC intensifies near-surface meridional gradient temperature in the North Atlantic and Europe, thus providing the energy to boost the jet stream. A stronger jet stream leads to less atmospheric blocking, reducing the frequency of cold spells over Europe. Although limited to the output of one model, our results indicate that a reduced AMOC strength may play a role in shaping future climate change cold spells by modulating the strength of the jet stream and the frequency of atmospheric blocking.
英文关键词	EC-Earth3 climate model; AMOC weakening; cold spells; atmospheric blocking; jet stream
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001129334700001
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296144
作者单位	Consiglio Nazionale delle Ricerche (CNR); Istituto di Scienze dell'Atmosfera e del Clima (ISAC-CNR); Polytechnic University of Turin; Consiglio Nazionale delle Ricerche (CNR); Istituto di Scienze dell'Atmosfera e del Clima (ISAC-CNR)
推荐引用方式 GB/T 7714	Meccia, Virna L.,Simolo, Claudia,Bellomo, Katinka,et al. Extreme cold events in Europe under a reduced AMOC[J],2024,19(1).
APA	Meccia, Virna L.,Simolo, Claudia,Bellomo, Katinka,&Corti, Susanna.(2024).Extreme cold events in Europe under a reduced AMOC.ENVIRONMENTAL RESEARCH LETTERS,19(1).
MLA	Meccia, Virna L.,et al."Extreme cold events in Europe under a reduced AMOC".ENVIRONMENTAL RESEARCH LETTERS 19.1(2024).