气候变化领域集成服务门户(CCPortal): On the Variability of the DWBC Transport Between 26.5°N and 16°N in an Eddy-Rich Ocean Model

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DOI	10.1029/2021JC017372
	On the Variability of the DWBC Transport Between 26.5°N and 16°N in an Eddy-Rich Ocean Model
	Schulzki T.; Getzlaff K.; Biastoch A.
发表日期	2021
ISSN	21699275
卷号	126 期号:6
英文摘要	The southward flow of North Atlantic Deep Water makes up the major component of the deepwater limb of the Atlantic Meridional Overturning Circulation (AMOC). In the subtropical North Atlantic, it's flow is concentrated along the continental slope, forming a coherent Deep Western Boundary Current (DWBC). Both, observations and models show a high variability of the flow in this region. Here we use an eddy-rich ocean model to show that this variability is mainly caused by eddies and meanders. Their formation process involves an important contribution from energy transfer by barotropic instability. They occur along the entire DWBC pathway and introduce several recirculation gyres that result in a decorrelation of the DWBC transport at 26.5°N and 16°N, despite the fact that a considerable mean transport of 20 Sv connects the two latitudes. Water in the DWBC at 26.5°N is partly returned northward. Because the amount of water returned depends on the DWBC transport itself, a stronger DWBC does not necessarily lead to an increased amount of water that reaches 16°N. Along the pathway to 16°N, the transport signal is altered by a broad and temporally variable transit time distribution. Thus, advection in the DWBC cannot account for coherent AMOC changes on interannual timescales seen in the model. © 2021. The Authors.
英文关键词	DWBC; high resolution modeling; mesoscale; MOVE; RAPID; transport variability
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/186286
作者单位	GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany; Kiel University, Kiel, Germany
推荐引用方式 GB/T 7714	Schulzki T.,Getzlaff K.,Biastoch A.. On the Variability of the DWBC Transport Between 26.5°N and 16°N in an Eddy-Rich Ocean Model[J],2021,126(6).
APA	Schulzki T.,Getzlaff K.,&Biastoch A..(2021).On the Variability of the DWBC Transport Between 26.5°N and 16°N in an Eddy-Rich Ocean Model.Journal of Geophysical Research: Oceans,126(6).
MLA	Schulzki T.,et al."On the Variability of the DWBC Transport Between 26.5°N and 16°N in an Eddy-Rich Ocean Model".Journal of Geophysical Research: Oceans 126.6(2021).