气候变化领域集成服务门户(CCPortal): Polar Amplification Due to Enhanced Heat Flux Across the Halocline

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DOI	10.1029/2019GL086706
	Polar Amplification Due to Enhanced Heat Flux Across the Halocline
	Beer E.; Eisenman I.; Wagner T.J.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Polar amplification is a widely discussed phenomenon, and a range of mechanisms have been proposed to contribute to it, many of which involve atmospheric and surface processes. However, substantial questions remain regarding the role of ocean heat transport. Previous studies have found that ocean heat transport into the Arctic increases under global warming, but the reasons behind this remain unresolved. Here, we investigate changes in oceanic heat fluxes and associated impacts on polar amplification using an idealized ocean-sea ice-climate model of the Northern Hemisphere. We show that beneath the sea ice, vertical temperature gradients across the halocline increase as the ocean warms, since the surface mixed layer temperatures in ice-covered regions are fixed near the freezing point. These enhanced vertical temperature gradients drive enhanced horizontal heat transport into the polar region and can contribute substantially to polar amplification. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate models; Global warming; Heat transfer; Oceanography; Sea ice; Thermal gradients; Heat transport; Northern Hemispheres; Ocean heat transport; Oceanic heat flux; Polar amplifications; Surface mixed layers; Surface process; Vertical temperature gradients; Heat flux; global warming; halocline; heat flux; ice cover; ice-ocean interaction; mixed layer; Northern Hemisphere; polar region; sea ice; Arctic
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/170664
作者单位	Scripps Institution of Oceanography, University of California San Diego, San Diego, CA, United States; Department of Physics and Physical Oceanography, University of North Carolina at Wilmington, Wilmington, NC, United States
推荐引用方式 GB/T 7714	Beer E.,Eisenman I.,Wagner T.J.W.. Polar Amplification Due to Enhanced Heat Flux Across the Halocline[J],2020,47(4).
APA	Beer E.,Eisenman I.,&Wagner T.J.W..(2020).Polar Amplification Due to Enhanced Heat Flux Across the Halocline.Geophysical Research Letters,47(4).
MLA	Beer E.,et al."Polar Amplification Due to Enhanced Heat Flux Across the Halocline".Geophysical Research Letters 47.4(2020).