气候变化领域集成服务门户(CCPortal): Transient climate response to Arctic Sea ice loss with two ice-constraining methods

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DOI	10.1175/JCLI-D-20-0288.1
	Transient climate response to Arctic Sea ice loss with two ice-constraining methods
	Simon A.; Gastineau G.; Frankignoul C.; Rousset C.; Codron F.
发表日期	2021
ISSN	08948755
起始页码	3295
结束页码	3310
卷号	34 期号:9
英文摘要	The impact of Arctic sea ice loss on the ocean and atmosphere is investigated focusing on a gradual reduction of Arctic sea ice by 20% of the annual mean, occurring within 30 years, starting from present-day conditions. Two ice-constraining methods are explored to melt Arctic sea ice in a coupled climate model, while keeping present-day conditions for external forcing. The first method uses a reduction of sea ice albedo, which modifies the incoming surface shortwave radiation. The second method uses a reduction of thermal conductivity, which changes the heat conduction flux inside ice. Reduced thermal conductivity inhibits oceanic cooling in winter and sea ice basal growth, reducing the seasonality of sea ice thickness. For similar Arctic sea ice area loss, decreasing the albedo induces larger Arctic warming than reducing the conductivity, especially in spring. Both ice-constraining methods produce similar climate impacts, but with smaller anomalies when reducing the conductivity. In the Arctic, the sea ice loss leads to an increase of the North Atlantic water inflow in the Barents Sea and eastern Arctic, while the salinity decreases and the gyre intensifies in the Beaufort Sea. In the North Atlantic, the subtropical gyre shifts southward and the Atlantic meridional overturning circulation weakens. A dipole of sea level pressure anomalies sets up in winter over northern Siberia and the North Atlantic, which resembles the negative phase of the North Atlantic Oscillation. In the tropics, the Atlantic intertropical convergence zone shifts southward as the South Atlantic Ocean warms. In addition, Walker circulation reorganizes and the southeastern Pacific Ocean cools. © 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Arctic; Atmosphere-ocean interaction; Climate change; Climate models; Large-scale motions; Sea ice
语种	英语
scopus关键词	Atmospheric pressure; Climate models; Heat conduction; Sea level; Solar radiation; Thermal conductivity; Transient analysis; Tropics; Atlantic meridional overturning circulations; Coupled climate model; Heat conduction flux; Intertropical convergence zone; North Atlantic oscillations; North Atlantic waters; Reduction of thermal conductivity; Short-wave radiation; Sea ice
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/178610
作者单位	Sorbonne Université, IRD, MNHN, CNRS, LOCEAN, Paris, France
推荐引用方式 GB/T 7714	Simon A.,Gastineau G.,Frankignoul C.,et al. Transient climate response to Arctic Sea ice loss with two ice-constraining methods[J],2021,34(9).
APA	Simon A.,Gastineau G.,Frankignoul C.,Rousset C.,&Codron F..(2021).Transient climate response to Arctic Sea ice loss with two ice-constraining methods.Journal of Climate,34(9).
MLA	Simon A.,et al."Transient climate response to Arctic Sea ice loss with two ice-constraining methods".Journal of Climate 34.9(2021).