气候变化领域集成服务门户(CCPortal): Freshening of Antarctic Bottom Water Off Cape Darnley, East Antarctica

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DOI	10.1029/2020JC016374
	Freshening of Antarctic Bottom Water Off Cape Darnley, East Antarctica
	Aoki S.; Katsumata K.; Hamaguchi M.; Noda A.; Kitade Y.; Shimada K.; Hirano D.; Simizu D.; Aoyama Y.; Doi K.; Nogi Y.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	Recently, a source of Antarctic Bottom Water (AABW) was identified off Cape Darnley at the eastern end of the Weddell-Enderby Basin. However, the behavior and long-term variability of Cape Darnley Bottom Water (CDBW) are not clearly understood. Hydrographic observations from 1974 to 2016 were compared, and a decade-long bottom temperature record was analyzed to clarify multidecadal changes in the CDBW in this region and its downstream influences. In the Cooperation Sea, CDBW spread northwestward with its deepest part reaching to approximately 4,900 dbar. CDBW freshening of 0.001–0.003 decade−1 was revealed. In the Cosmonaut Sea, long-term AABW warming of approximately 0.01–0.03°C decade−1 was prominent in the deep basin, while freshening was detected on the upper continental slope. Spatial patterns suggest that an interbasin deep transport of excess freshwater is carried by CDBW and fed into the Weddell Gyre, which might act as an abyssal freshwater buffer. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Antarctic Bottom Water; Cape Darnley; East Antarctica; freshening; polynya; Weddell Gyre
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186752
作者单位	Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Now at C's Lab, Sapporo, Japan; Now at MEXT, Tokyo, Japan; Tokyo University of Marine Science and Technology, Tokyo, Japan; Arctic Research Center, Hokkaido University, Sapporo, Japan; National Institute of Polar Research, Tachikawa, Japan
推荐引用方式 GB/T 7714	Aoki S.,Katsumata K.,Hamaguchi M.,et al. Freshening of Antarctic Bottom Water Off Cape Darnley, East Antarctica[J],2020,125(8).
APA	Aoki S..,Katsumata K..,Hamaguchi M..,Noda A..,Kitade Y..,...&Nogi Y..(2020).Freshening of Antarctic Bottom Water Off Cape Darnley, East Antarctica.Journal of Geophysical Research: Oceans,125(8).
MLA	Aoki S.,et al."Freshening of Antarctic Bottom Water Off Cape Darnley, East Antarctica".Journal of Geophysical Research: Oceans 125.8(2020).