气候变化领域集成服务门户(CCPortal): Recent recovery of Antarctic Bottom Water formation in the Ross Sea driven by climate anomalies

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DOI	10.1038/s41561-020-00655-3
	Recent recovery of Antarctic Bottom Water formation in the Ross Sea driven by climate anomalies
	Silvano A.; Foppert A.; Rintoul S.R.; Holland P.R.; Tamura T.; Kimura N.; Castagno P.; Falco P.; Budillon G.; Haumann F.A.; Naveira Garabato A.C.; Macdonald A.M.
发表日期	2020
ISSN	17520894
起始页码	780
结束页码	786
卷号	13 期号:12
英文摘要	Antarctic Bottom Water (AABW) supplies the lower limb of the global overturning circulation, ventilates the abyssal ocean and sequesters heat and carbon on multidecadal to millennial timescales. AABW originates on the Antarctic continental shelf, where strong winter cooling and brine released during sea ice formation produce Dense Shelf Water, which sinks to the deep ocean. The salinity, density and volume of AABW have decreased over the last 50 years, with the most marked changes observed in the Ross Sea. These changes have been attributed to increased melting of the Antarctic Ice Sheet. Here we use in situ observations to document a recovery in the salinity, density and thickness (that is, depth range) of AABW formed in the Ross Sea, with properties in 2018–2019 similar to those observed in the 1990s. The recovery was caused by increased sea ice formation on the continental shelf. Increased sea ice formation was triggered by anomalous wind forcing associated with the unusual combination of positive Southern Annular Mode and extreme El Niño conditions between 2015 and 2018. Our study highlights the sensitivity of AABW formation to remote forcing and shows that climate anomalies can drive episodic increases in local sea ice formation that counter the tendency for increased ice-sheet melt to reduce AABW formation. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	Antarctic Bottom Water; brine; cooling; ice sheet; sea ice; snowmelt; volume transport; wind forcing; Antarctic Ice Sheet; Antarctica; Ross Sea; Southern Ocean
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206833
作者单位	Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton, United Kingdom; CSIRO Oceans & Atmosphere, Hobart, TAS, Australia; Centre for Southern Hemisphere Oceans Research, Hobart, TAS, Australia; Australian Antarctic Program Partnership, University of Tasmania, Hobart, TAS, Australia; British Antarctic Survey, Cambridge, United Kingdom; National Institute of Polar Research, Tachikawa, Japan; SOKENDAI, Graduate University for Advanced Studies, Tachikawa, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Tokyo, Japan; Department of Sciences and Technologies, Parthenope University, Naples, Italy; Consorzio Nazionale Interuniversitario per le Scienze del Mare, Rome, Italy; Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; Woods Hole Oceanographic Institution, Woods Hole, MA, United States
推荐引用方式 GB/T 7714	Silvano A.,Foppert A.,Rintoul S.R.,et al. Recent recovery of Antarctic Bottom Water formation in the Ross Sea driven by climate anomalies[J],2020,13(12).
APA	Silvano A..,Foppert A..,Rintoul S.R..,Holland P.R..,Tamura T..,...&Macdonald A.M..(2020).Recent recovery of Antarctic Bottom Water formation in the Ross Sea driven by climate anomalies.Nature Geoscience,13(12).
MLA	Silvano A.,et al."Recent recovery of Antarctic Bottom Water formation in the Ross Sea driven by climate anomalies".Nature Geoscience 13.12(2020).