气候变化领域集成服务门户(CCPortal): Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation

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DOI	10.1038/s41558-019-0561-2
	Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation
	Abrahamsen E.P.; Meijers A.J.S.; Polzin K.L.; Naveira Garabato A.C.; King B.A.; Firing Y.L.; Sallée J.-B.; Sheen K.L.; Gordon A.L.; Huber B.A.; Meredith M.P.
发表日期	2019
ISSN	1758678X
卷号	9 期号:10
英文摘要	The lower limb of the Atlantic overturning circulation is resupplied by the sinking of dense Antarctic Bottom Water (AABW) that forms via intense air–sea–ice interactions next to Antarctica, especially in the Weddell Sea1. In the last three decades, AABW has warmed, freshened and declined in volume across the Atlantic Ocean and elsewhere2–7, suggesting an ongoing major reorganization of oceanic overturning8,9. However, the future contributions of AABW to the Atlantic overturning circulation are unclear. Here, using observations of AABW in the Scotia Sea, the most direct pathway from the Weddell Sea to the Atlantic Ocean, we show a recent cessation in the decline of the AABW supply to the Atlantic overturning circulation. The strongest decline was observed in the volume of the densest layers in the AABW throughflow from the early 1990s to 2014; since then, it has stabilized and partially recovered. We link these changes to variability in the densest classes of abyssal waters upstream. Our findings indicate that the previously observed decline in the supply of dense water to the Atlantic Ocean abyss may be stabilizing or reversing and thus call for a reassessment of Antarctic influences on overturning circulation, sea level, planetary-scale heat distribution and global climate2,3,8. © 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/124342
作者单位	British Antarctic Survey, Cambridge, United Kingdom; Woods Hole Oceanographic Institution, Woods Hole, MA, United States; University of Southampton, Southampton, United Kingdom; National Oceanography Centre, Southampton, United Kingdom; Sorbonne Université, CNRS, LOCEAN, Paris, France; University of Exeter, Penryn, United Kingdom; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Abrahamsen E.P.,Meijers A.J.S.,Polzin K.L.,et al. Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation[J],2019,9(10).
APA	Abrahamsen E.P..,Meijers A.J.S..,Polzin K.L..,Naveira Garabato A.C..,King B.A..,...&Meredith M.P..(2019).Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation.Nature Climate Change,9(10).
MLA	Abrahamsen E.P.,et al."Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation".Nature Climate Change 9.10(2019).