气候变化领域集成服务门户(CCPortal): Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes

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DOI	10.1038/s41558-023-01695-4
	Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes
	Zhou, Shenjie; Meijers, Andrew J. S.; Meredith, Michael P. P.; Abrahamsen, E. Povl; Holland, Paul R. R.; Silvano, Alessandro; Sallee, Jean-Baptiste; Osterhus, Svein
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
起始页码	701
结束页码	+
卷号	13 期号:7
英文摘要	Dense-water formation around Antarctica could be reduced as climate change alters sea-ice formation and circulation patterns. This study shows there has been an over 40% reduction in dense-water formation in the Weddell Sea since 1992, which could affect global overturning circulation. Antarctic Bottom Water (AABW) is pivotal for oceanic heat and carbon sequestrations on multidecadal to millennial timescales. The Weddell Sea contributes nearly a half of global AABW through Weddell Sea Deep Water and denser underlying Weddell Sea Bottom Water that form on the continental shelves via sea-ice production. Here we report an observed 30% reduction of Weddell Sea Bottom Water volume since 1992, with the largest decrease in the densest classes. This is probably driven by a multidecadal reduction in dense-water production over southern continental shelf associated with a >40% decline in the sea-ice formation rate. The ice production decrease is driven by northerly wind trend, related to a phase transition of the Interdecadal Pacific Oscillation since the early 1990s, superposed by Amundsen Sea Low intrinsic variability. These results reveal key influences on exported AABW to the Atlantic abyss and their sensitivity to large-scale, multidecadal climate variability.
英文关键词	SOUTHERN-OCEAN; LEVEL RISE; VARIABILITY; SHELF; DEEP; TEMPERATURE; CIRCULATION; TOPOGRAPHY; ATLANTIC; BUDGETS
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001004931500003
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/282269
作者单位	UK Research & Innovation (UKRI); Natural Environment Research Council (NERC); NERC British Antarctic Survey; NERC National Oceanography Centre; University of Southampton; Institut de Recherche pour le Developpement (IRD); Centre National de la Recherche Scientifique (CNRS); Sorbonne Universite; Museum National d'Histoire Naturelle (MNHN); Norwegian Research Centre (NORCE); Bjerknes Centre for Climate Research
推荐引用方式 GB/T 7714	Zhou, Shenjie,Meijers, Andrew J. S.,Meredith, Michael P. P.,et al. Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes[J],2023,13(7).
APA	Zhou, Shenjie.,Meijers, Andrew J. S..,Meredith, Michael P. P..,Abrahamsen, E. Povl.,Holland, Paul R. R..,...&Osterhus, Svein.(2023).Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes.Nature Climate Change,13(7).
MLA	Zhou, Shenjie,et al."Slowdown of Antarctic Bottom Water export driven by climatic wind and sea-ice changes".Nature Climate Change 13.7(2023).