气候变化领域集成服务门户(CCPortal): Future Reductions in Polar Cold Air Mass and Cold Air Outbreaks Revealed From Isentropic Analysis

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DOI	10.1029/2019GL086076
	Future Reductions in Polar Cold Air Mass and Cold Air Outbreaks Revealed From Isentropic Analysis
	Kanno Y.; Iwasaki T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	This study quantifies future changes in the polar cold air mass (PCAM) below a threshold potential temperature of 280 K and its horizontal fluxes, which are an indicator for the intensity of cold air outbreaks, by analyzing the outputs from five climate models from the Fifth Coupled Model Intercomparison Project. Under the business-as-usual scenario, the multimodel means of the wintertime total hemispheric PCAM decrease by 37% in the Northern Hemisphere and by 34% in the Southern Hemisphere by the end of the 21st century. The midlatitude equatorward PCAM fluxes are projected to decrease significantly by around 2050. This is primarily due to the reduction of the PCAM and to a lesser extent due to the weakening of the extratropical meridional circulation. Finally, intermodel differences in the total hemispheric PCAM reduction are shown to be linearly related to the climate sensitivity to the global mean surface air temperature. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	Climate models; Cold air mass; Cold air outbreak; Isentropic analysis; Meridional circulation; Polar Regions; Climate change; air mass; climate change; climate modeling; CMIP; cold air; isotopic analysis; meridional circulation; Northern Hemisphere; polar region; potential temperature; Southern Hemisphere; temperature effect
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170774
作者单位	Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan; Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan
推荐引用方式 GB/T 7714	Kanno Y.,Iwasaki T.. Future Reductions in Polar Cold Air Mass and Cold Air Outbreaks Revealed From Isentropic Analysis[J],2020,47(3).
APA	Kanno Y.,&Iwasaki T..(2020).Future Reductions in Polar Cold Air Mass and Cold Air Outbreaks Revealed From Isentropic Analysis.Geophysical Research Letters,47(3).
MLA	Kanno Y.,et al."Future Reductions in Polar Cold Air Mass and Cold Air Outbreaks Revealed From Isentropic Analysis".Geophysical Research Letters 47.3(2020).