气候变化领域集成服务门户(CCPortal): Antarctic iceberg impacts on future Southern Hemisphere climate

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DOI	10.1038/s41558-019-0546-1
	Antarctic iceberg impacts on future Southern Hemisphere climate
	Schloesser F.; Friedrich T.; Timmermann A.; DeConto R.M.; Pollard D.
发表日期	2019
ISSN	1758678X
卷号	9 期号:9
英文摘要	Future iceberg and meltwater discharge from the Antarctic ice sheet (AIS) could substantially exceed present levels, with strong implications for future climate and sea levels. Recent climate model simulations on the impact of a rapid disintegration of the AIS on climate have applied idealized freshwater forcing scenarios1,2 rather than the more realistic iceberg forcing. Here we use a coupled climate–iceberg model to determine the climatic effects of combined iceberg latent heat of fusion and freshwater forcing. The iceberg forcing is derived from an ensemble of future simulations conducted using the Penn State ice-sheet model3. In agreement with previous studies, the simulated AIS meltwater forcing causes a substantial delay in greenhouse warming in the Southern Hemisphere and activates a transient positive feedback between surface freshening, subsurface warming and ice-sheet/shelf melting, which can last for about 100 years and may contribute to an accelerated ice loss around Antarctica. However, accounting further for the oceanic heat loss due to iceberg melting considerably increases the surface cooling effect and reduces the subsurface temperature feedback amplitude. Our findings document the importance of considering realistic climate–ice sheet–iceberg coupling for future climate and sea-level projections. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124362
作者单位	International Pacific Research Center, University of Hawaii at Manoa, Honolulu, HI, United States; Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI, United States; Center for Climate Physics, Institute for Basic Science, Busan, South Korea; Pusan National University, Busan, South Korea; Department of Geosciences, University of Massachusetts, Amherst, MA, United States; Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Schloesser F.,Friedrich T.,Timmermann A.,et al. Antarctic iceberg impacts on future Southern Hemisphere climate[J],2019,9(9).
APA	Schloesser F.,Friedrich T.,Timmermann A.,DeConto R.M.,&Pollard D..(2019).Antarctic iceberg impacts on future Southern Hemisphere climate.Nature Climate Change,9(9).
MLA	Schloesser F.,et al."Antarctic iceberg impacts on future Southern Hemisphere climate".Nature Climate Change 9.9(2019).