气候变化领域集成服务门户(CCPortal): Rate-induced tipping cascades arising from interactions between the Greenland Ice Sheet and the Atlantic Meridional Overturning Circulation

CCPortal

DOI	10.5194/esd-15-635-2024
	Rate-induced tipping cascades arising from interactions between the Greenland Ice Sheet and the Atlantic Meridional Overturning Circulation
	Klose, Ann Kristin; Donges, Jonathan F.; Feudel, Ulrike; Winkelmann, Ricarda
发表日期	2024
ISSN	2190-4979
EISSN	2190-4987
起始页码	15
结束页码	3
卷号	15 期号:3
英文摘要	The Greenland Ice Sheet (GIS) and Atlantic Meridional Overturning Circulation (AMOC) are considered tipping elements in the climate system, where global warming exceeding critical threshold levels in forcing can lead to large-scale and nonlinear reductions in ice volume and overturning strength, respectively. The positive-negative feedback loop governing their interaction with a destabilizing effect on the AMOC due to ice loss and subsequent freshwater flux into the North Atlantic as well as a stabilizing effect of a net cooling around Greenland with an AMOC weakening may determine the long-term stability of both tipping elements. Here we explore the potential dynamic regimes arising from this positive-negative tipping feedback loop in a physically motivated conceptual model. Under idealized forcing scenarios we identify conditions under which different kinds of tipping cascades can occur: herein, we distinguish between overshoot/bifurcation tipping cascades, leading to tipping of both GIS and AMOC, and rate-induced tipping cascades, where the AMOC, despite not having crossed its own intrinsic tipping point, tips nonetheless due to the fast rate of ice loss from Greenland. The occurrence of these different cascades is affected by the ice sheet disintegration time and thus eventually by the imposed forcing and its timescales. Our results suggest that it is necessary not only to avoid surpassing the respective critical levels of the environmental drivers for the Greenland Ice Sheet and Atlantic Meridional Overturning Circulation, but also to respect safe rates of environmental change to mitigate potential domino effects.
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001231154800001
来源期刊	EARTH SYSTEM DYNAMICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298046
作者单位	Potsdam Institut fur Klimafolgenforschung; University of Potsdam; Stockholm University; Carl von Ossietzky Universitat Oldenburg
推荐引用方式 GB/T 7714	Klose, Ann Kristin,Donges, Jonathan F.,Feudel, Ulrike,et al. Rate-induced tipping cascades arising from interactions between the Greenland Ice Sheet and the Atlantic Meridional Overturning Circulation[J],2024,15(3).
APA	Klose, Ann Kristin,Donges, Jonathan F.,Feudel, Ulrike,&Winkelmann, Ricarda.(2024).Rate-induced tipping cascades arising from interactions between the Greenland Ice Sheet and the Atlantic Meridional Overturning Circulation.EARTH SYSTEM DYNAMICS,15(3).
MLA	Klose, Ann Kristin,et al."Rate-induced tipping cascades arising from interactions between the Greenland Ice Sheet and the Atlantic Meridional Overturning Circulation".EARTH SYSTEM DYNAMICS 15.3(2024).