气候变化领域集成服务门户(CCPortal): Kinematic Subduction Rate Of Labrador Sea Water From an Eddy-Permitting Numerical Model

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DOI	10.1029/2019JC015475
	Kinematic Subduction Rate Of Labrador Sea Water From an Eddy-Permitting Numerical Model
	Courtois P.; Garcia-Quintana Y.; Hu X.; Myers P.G.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	We use an eddy-permitting, 1/12° regional configuration of the Nucleus for European Modelling of the Ocean (NEMO) model to examine water mass subduction rates in the Labrador Sea for the 2002–2013 period. An instantaneous kinematic subduction approach is implemented to calculate the subduction rate of Labrador Sea Water (LSW). By following the outcrop positions of a given isopycncal range, we calculate the vertical transport of a water mass from the mixed layer into the permanent thermocline over the course of a year. We examine the importance of the various terms in this approach, including the evolution of the Mixed Layer Depth (MLD), the advection across the base of the Mixed Layer (ML), and the vertical velocity at the base of the ML. We find that the subduction rate is not greatly affected by the definition of the MLD, as long as the integration time is long enough for the subduction-obduction processes to balance each other. The total LSW subduction rate is ∼4–5 Sv, with similar rates for both Upper (ULSW) and Classical LSWs (CLSW), (∼2–2.5 Sv). After 2008, a shift in the LSW density is found in the simulation. CLSW reaches a maximum rate of 6 Sv in 2008, which is mainly inferred by the instantaneous ML change. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Labrador Sea Water; ocean modeling; subduction rate
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/186802
作者单位	Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada; Bedford Institute of Oceanography, Dartmouth, NS, Canada
推荐引用方式 GB/T 7714	Courtois P.,Garcia-Quintana Y.,Hu X.,et al. Kinematic Subduction Rate Of Labrador Sea Water From an Eddy-Permitting Numerical Model[J],2020,125(7).
APA	Courtois P.,Garcia-Quintana Y.,Hu X.,&Myers P.G..(2020).Kinematic Subduction Rate Of Labrador Sea Water From an Eddy-Permitting Numerical Model.Journal of Geophysical Research: Oceans,125(7).
MLA	Courtois P.,et al."Kinematic Subduction Rate Of Labrador Sea Water From an Eddy-Permitting Numerical Model".Journal of Geophysical Research: Oceans 125.7(2020).