How Does Antarctic Bottom Water Cross the Southern Ocean?

How Does Antarctic Bottom Water Cross the Southern Ocean?
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南极底层水如何穿越南大洋?

DOI:
10.1029/2021gl097211
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发表时间:
2022
影响因子:
5.2
通讯作者:
Cimoli, L.
Cimoli, L.
中科院分区:
地球科学1区
文献类型:
--
作者:
Solodoch, A.;Stewart, A. L.;Hogg, A. McC.;Morrison, A. K.;Kiss, A. E.;Thompson, A. F.;Purkey, S. G.;Cimoli, L.

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充满全球海洋深渊的南极底水(AABW)源自几个不同的南极陆架区域形成的稠密水。先前的模型研究对于 AABW 穿过南大洋的出口路径以及来自不同来源地区的 AABW 在出口过程中混合的程度得出了相互矛盾的结论。本研究在 61 年全球高分辨率(0.1°)海洋/海冰模拟中使用被动示踪剂部署来解决这些问题。确定了两条不同的出口“管道”:来自威德尔海和普里兹湾的 AABW 混合在一起,主要出口到大西洋和印度洋,而来自罗斯海和阿德利陆地的 AABW 主要出口到太平洋。每个示踪剂的向北运输几乎完全(>90%)发生在单个管道内。这些发现表明,AABW 产量的区域变化可能会影响全球翻转环流的三维结构。
Antarctic Bottom Water (AABW), which fills the global ocean abyss, is derived from dense water that forms in several distinct Antarctic shelf regions. Previous modeling studies have reached conflicting conclusions regarding export pathways of AABW across the Southern Ocean and the degree to which AABW originating from distinct source regions are blended during their export. This study addresses these questions using passive tracer deployments in a 61‐year global high‐resolution (0.1°) ocean/sea‐ice simulation. Two distinct export “conduits” are identified: Weddell Sea‐ and Prydz Bay‐sourced AABW are blended together and exported mainly to the Atlantic and Indian Oceans, while Ross Sea‐ and Adelie Land‐sourced AABW are exported mainly to the Pacific Ocean. Northward transport of each tracer occurs almost exclusively (>90%) within a single conduit. These findings imply that regional changes in AABW production may impact the three‐dimensional structure of the global overturning circulation.
通过德雷克航道的南极绕极洋流传输:我们可以从高分辨率模型结果与观测结果的比较中学到什么?
DOI: 10.1002/essoar.10503007.2
发表时间: 2020
期刊: Journal of Geophysical Research: Oceans
影响因子: --
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发表时间: 2021
影响因子: 3.5
作者:
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