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DOI	10.1007/s00382-021-05816-7
	A realistic Greenland ice sheet and surrounding glaciers and ice caps melting in a coupled climate model
	Devilliers M.; Swingedouw D.; Mignot J.; Deshayes J.; Garric G.; Ayache M.
发表日期	2021
ISSN	0930-7575
起始页码	665
结束页码	678
英文摘要	Greenland ice sheet experienced an intensive melting in the last century, especially in the 1920s and over the last decades. The supplementary input into the ocean could disrupt the freshwater budget of the North Atlantic. Simultaneously, some signs of a recent weakening of the Atlantic Meridional Overturning Circulation (AMOC) have been reported. In order to better understand the possible impact of the increasing melting on the North Atlantic circulation, salinity and temperature trends, we construct an observation-based estimate of the freshwater fluxes spanning from 1840 to 2014. The estimate is based on runoff fluxes coming from Greenland ice sheet and surrounding glaciers and ice caps. Input from iceberg melting is also included and spatially distributed over the North Atlantic following an observed climatology. We force a set of historical simulations of the IPSL-CM6A-LR coupled climate model with this reconstruction from 1920 to 2014. The ten-member ensemble mean displays freshened and cooled waters around Greenland, which spread in the subpolar gyre, and then towards the subtropical gyre and the Nordic Seas. Over the whole period, the convection is reduced in the Labrador and Nordic Seas, while it is slightly enhanced in the Irminger Sea, and the AMOC is weakened by 0.32 ± 0.35 Sv at 26 ∘ N. The multi-decadal trend of the North Atlantic surface temperature obtained with the additional freshwater forcing is slightly closer to observations than in standard historical simulations, although the two trends are only different at the 90% confidence level. Slight improvement of the Root Mean Square Error with respect to observations in the subpolar gyre region suggests that part of the surface temperature variability over the recent decades may have been forced by the release of freshwater from Greenland and surrounding regions since the 1920s. Finally, we highlight that the AMOC decrease due to Greenland melting remains modest in these simulations and can only explain a very small amount of the 3 ± 1 Sv weakening suggested in a recent study. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	AMOC; Greenland melting; Subpolar gyre
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183441
作者单位	EPOC UMR 5805 CNRS, OASU, Université de Bordeaux Allée Geoffroy Saint-Hilaire, CS 50023, Pessac Cedex, 33615, France; LOCEAN UMR 7159 CNRS IRD, Université Pierre et Marie Curie/MNHN, Institut Pierre Simon Laplace, Boîte 100, 4, place Jussieu, Paris Cedex 05, 75252, France; Mercator Océan, 8-10 rue Hermès, Ramonville Saint-Agne, 31520, France
推荐引用方式 GB/T 7714	Devilliers M.,Swingedouw D.,Mignot J.,et al. A realistic Greenland ice sheet and surrounding glaciers and ice caps melting in a coupled climate model[J],2021.
APA	Devilliers M.,Swingedouw D.,Mignot J.,Deshayes J.,Garric G.,&Ayache M..(2021).A realistic Greenland ice sheet and surrounding glaciers and ice caps melting in a coupled climate model.Climate Dynamics.
MLA	Devilliers M.,et al."A realistic Greenland ice sheet and surrounding glaciers and ice caps melting in a coupled climate model".Climate Dynamics (2021).