气候变化领域集成服务门户(CCPortal): Decomposing the drivers of polar amplification with a single-column model

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DOI	10.1175/JCLI-D-20-0178.1
	Decomposing the drivers of polar amplification with a single-column model
	Henry M.; Merlis T.M.; Lutsko N.J.; Rose B.E.J.
发表日期	2021
ISSN	08948755
起始页码	2355
结束页码	2365
卷号	34 期号:6
英文摘要	The precise mechanisms driving Arctic amplification are still under debate. Previous attribution methods compute the vertically uniform temperature change required to balance the top-of-atmosphere energy imbalance caused by each forcing and feedback, with any departures from vertically uniform warming collected into the lapse-rate feedback. We propose an alternative attribution method using a single-column model that accounts for the forcing dependence of high-latitude lapse-rate changes. We examine this method in an idealized general circulation model (GCM), finding that, even though the column-integrated carbon dioxide (CO2) forcing and water vapor feedback are stronger in the tropics, they contribute to polar-amplified surface warming as they produce bottom-heavy warming in high latitudes. A separation of atmospheric temperature changes into local and remote contributors shows that, in the absence of polar surface forcing (e.g., sea ice retreat), changes in energy transport are primarily responsible for the polar-amplified pattern of warming. The addition of surface forcing substantially increases polar surface warming and reduces the contribution of atmospheric dry static energy transport to the warming. This physically based attribution method can be applied to comprehensive GCMs to provide a clearer view of the mechanisms behind Arctic amplification. © 2021 American Meteorological Society.
英文关键词	Arctic; Climate change; Feedback
语种	英语
scopus关键词	Carbon dioxide; Sea ice; Dry static energy; Energy imbalances; General circulation model; Polar amplifications; Single-column model; Top of atmospheres; Uniform temperature; Water vapor feedbacks; Atmospheric movements; amplification; carbon dioxide; climate change; climate forcing; climate modeling; column; general circulation model; Arctic
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178663
作者单位	College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom; Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, QC, Canada; Scripps Institution of Oceanography, University of California at San Diego, San Diego, CA, United States; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States
推荐引用方式 GB/T 7714	Henry M.,Merlis T.M.,Lutsko N.J.,et al. Decomposing the drivers of polar amplification with a single-column model[J],2021,34(6).
APA	Henry M.,Merlis T.M.,Lutsko N.J.,&Rose B.E.J..(2021).Decomposing the drivers of polar amplification with a single-column model.Journal of Climate,34(6).
MLA	Henry M.,et al."Decomposing the drivers of polar amplification with a single-column model".Journal of Climate 34.6(2021).