Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas
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 Norwegi...
Published in: | Journal of Geophysical Research: Oceans |
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fttudelft:oai:tudelft.nl:uuid:01f13d0c-a43c-48a3-bc2b-964ac01edeb7 2024-04-28T08:29:06+00:00 Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas Ypma, S.L. (author) Georgiou, S. (author) Dugstad, J.S. (author) Pietrzak, J.D. (author) Katsman, C.A. (author) 2020 http://resolver.tudelft.nl/uuid:01f13d0c-a43c-48a3-bc2b-964ac01edeb7 https://doi.org/10.1029/2020JC016075 en eng http://www.scopus.com/inward/record.url?scp=85091527746&partnerID=8YFLogxK Journal Of Geophysical Research-Oceans--2169-9275--d54e148e-5eef-457f-bce5-fd13675f227e http://resolver.tudelft.nl/uuid:01f13d0c-a43c-48a3-bc2b-964ac01edeb7 https://doi.org/10.1029/2020JC016075 © 2020 S.L. Ypma, S. Georgiou, J.S. Dugstad, J.D. Pietrzak, C.A. Katsman drifters Lagrangian methods Nordic Seas watermass transformation journal article 2020 fttudelft https://doi.org/10.1029/2020JC016075 2024-04-10T00:03:45Z 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. Environmental Fluid Mechanics Article in Journal/Newspaper Nordic Seas Delft University of Technology: Institutional Repository Journal of Geophysical Research: Oceans 125 9 |
institution |
Open Polar |
collection |
Delft University of Technology: Institutional Repository |
op_collection_id |
fttudelft |
language |
English |
topic |
drifters Lagrangian methods Nordic Seas watermass transformation |
spellingShingle |
drifters Lagrangian methods Nordic Seas watermass transformation Ypma, S.L. (author) Georgiou, S. (author) Dugstad, J.S. (author) Pietrzak, J.D. (author) Katsman, C.A. (author) Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas |
topic_facet |
drifters Lagrangian methods Nordic Seas watermass transformation |
description |
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. Environmental Fluid Mechanics |
format |
Article in Journal/Newspaper |
author |
Ypma, S.L. (author) Georgiou, S. (author) Dugstad, J.S. (author) Pietrzak, J.D. (author) Katsman, C.A. (author) |
author_facet |
Ypma, S.L. (author) Georgiou, S. (author) Dugstad, J.S. (author) Pietrzak, J.D. (author) Katsman, C.A. (author) |
author_sort |
Ypma, S.L. (author) |
title |
Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas |
title_short |
Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas |
title_full |
Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas |
title_fullStr |
Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas |
title_full_unstemmed |
Pathways and Water Mass Transformation Along and Across the Mohn-Knipovich Ridge in the Nordic Seas |
title_sort |
pathways and water mass transformation along and across the mohn-knipovich ridge in the nordic seas |
publishDate |
2020 |
url |
http://resolver.tudelft.nl/uuid:01f13d0c-a43c-48a3-bc2b-964ac01edeb7 https://doi.org/10.1029/2020JC016075 |
genre |
Nordic Seas |
genre_facet |
Nordic Seas |
op_relation |
http://www.scopus.com/inward/record.url?scp=85091527746&partnerID=8YFLogxK Journal Of Geophysical Research-Oceans--2169-9275--d54e148e-5eef-457f-bce5-fd13675f227e http://resolver.tudelft.nl/uuid:01f13d0c-a43c-48a3-bc2b-964ac01edeb7 https://doi.org/10.1029/2020JC016075 |
op_rights |
© 2020 S.L. Ypma, S. Georgiou, J.S. Dugstad, J.D. Pietrzak, C.A. Katsman |
op_doi |
https://doi.org/10.1029/2020JC016075 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
9 |
_version_ |
1797587454487691264 |