气候变化领域集成服务门户(CCPortal): Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas

CCPortal

DOI	10.1029/2020JC016075
	Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas
	Ypma S.L.; Georgiou S.; Dugstad J.S.; Pietrzak J.D.; Katsman C.A.
发表日期	2020
ISSN	21699275
卷号	125 期号:9
英文摘要	Atlantic Water takes various pathways through the Nordic Seas, and its transformation to denser waters forms a crucial connection to the lower limb of the Atlantic Meridional Overturning Circulation. Circulation maps often schematize two distinct pathways of Atlantic Water: one following the Norwegian Atlantic Slope Current along the continental slope of Norway and one following the Norwegian Atlantic Front Current along the Mohn and Knipovich Ridges. In this paper, the connectivity between the northward flow along these ridges is investigated. Analyzing trajectories of surface drifters and ARGO floats, we find that only 8% of the floats that travel near the mid-ocean ridges take the frontal pathway to the north. Indeed, by tracing numerical particles in a realistic numerical simulation, part of the water mass traveling along the Mohn Ridge follows the 2,500 m isobath eastward and joins the slope current, instead of flowing north along the Knipovich Ridge. Furthermore, north of 74°N, frequent exchange between the slope current and the front current is observed. Therefore, the slope current and front current are less isolated than often schematized. Additionally, the observational data set reveals substantial cross-ridge exchange; 31% of the floats that travel within 60 km from the mid-ocean ridges cross it. Results from numerical simulations indicate that the cross-ridge exchange leads to cooling and freshening of the Atlantic Water along the front. Deployments of floats near the mid-ocean ridges are needed to investigate the pathway of Atlantic Water and its exchange across the ridge in more detail. ©2020. The Authors.
英文关键词	drifters; Lagrangian methods; Nordic Seas; watermass transformation
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/186669
作者单位	Department of Hydraulic Engineering, Civil Engineering and Geosciences, Environmental Fluid Mechanics, Delft University of Technology, Delft, Netherlands; Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands; Geophysical Institute, Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway
推荐引用方式 GB/T 7714	Ypma S.L.,Georgiou S.,Dugstad J.S.,et al. Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas[J],2020,125(9).
APA	Ypma S.L.,Georgiou S.,Dugstad J.S.,Pietrzak J.D.,&Katsman C.A..(2020).Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas.Journal of Geophysical Research: Oceans,125(9).
MLA	Ypma S.L.,et al."Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas".Journal of Geophysical Research: Oceans 125.9(2020).