气候变化领域集成服务门户(CCPortal): Increased European heat waves in recent decades in response to shrinking Arctic sea ice and Eurasian snow cover

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DOI	10.1038/s41612-020-0110-8
	Increased European heat waves in recent decades in response to shrinking Arctic sea ice and Eurasian snow cover
	Zhang R.; Sun C.; Zhu J.; Zhang R.; Li W.
发表日期	2020
ISSN	23973722
卷号	3 期号:1
英文摘要	In recent decades, unprecedented extreme summer heat waves have occurred in Europe, and they have exhibited an increasing trend since 1970s. Although previous studies have suggested that these recent hot European summers could have been instigated by the underlying surface thermal conditions, the possible influence of shrinking Arctic sea ice and Eurasian snow cover on heat waves are not well understood. Herein, we present evidence obtained via observational analyses and numerical experiments indicating that the interdecadal increase in European heat waves is closely linked to the reductions in Arctic sea ice concentration (ASIC) and Eurasian snow cover fraction (EASC) across mid–high latitudes via the excitation of the anomalous Eurasian wave train. The combined effects of declined ASIC and EASC, accompanied by the drier soil and the stronger heat flux, tend to weaken the poleward temperature gradient at mid–high latitudes and affect the midlatitude jet stream and transient eddy activities. These dynamic and thermodynamic circulations increase the likelihood of more persistent European blocking events that favor frequent and strengthened heat waves. Further projection analysis of simulations from 13 CMIP5 climate models suggests that Europe may experience more hot summers as the ASIC and EASC continue to decline over the next century. © 2020, The Author(s).
语种	英语
scopus关键词	climate modeling; decadal variation; heat wave; sea ice; snow cover; summer; temperature gradient; Arctic Ocean; Europe
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178059
作者单位	Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China; State Key Laboratory of Severe Weather and Institute of Climate System, Chinese Academy of Meteorological Sciences, Beijing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, China; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; National Climate Center, China Meteorological Administration, Beijing, China
推荐引用方式 GB/T 7714	Zhang R.,Sun C.,Zhu J.,et al. Increased European heat waves in recent decades in response to shrinking Arctic sea ice and Eurasian snow cover[J],2020,3(1).
APA	Zhang R.,Sun C.,Zhu J.,Zhang R.,&Li W..(2020).Increased European heat waves in recent decades in response to shrinking Arctic sea ice and Eurasian snow cover.npj Climate and Atmospheric Science,3(1).
MLA	Zhang R.,et al."Increased European heat waves in recent decades in response to shrinking Arctic sea ice and Eurasian snow cover".npj Climate and Atmospheric Science 3.1(2020).