Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell
The structure, transport, and seasonal variability of the West Greenland boundary current system near Cape Farewell are investigated using a high-resolution mooring array deployed from 2014 to 2018. The boundary current system is comprised of three components: the West Greenland Coastal Current, whi...
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Language: | English |
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ftnioz:oai:imis.nioz.nl:330779 2023-05-15T15:51:49+02:00 Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell Pacini, A. Pickart, R.S. Bahr, F. Torres, D.J. Ramsey, A.L. Holte, J. Karstensen, J. Oltmanns, M. Straneo, F. Le Bras, I.A. Moore, G.W.K. de Jong, M.F. 2020 http://imis.nioz.nl/imis.php?module=ref&refid=330779 en eng info:eu-repo/semantics/altIdentifier/wos/000589826300004 info:eu-repo/semantics/altIdentifier/doi/.org/10.1175/jpo-d-20-0086.1 http://imis.nioz.nl/imis.php?module=ref&refid=330779 info:eu-repo/semantics/closedAccess %3Ci%3EJ.+Phys.+Oceanogr.+50%2810%29%3C%2Fi%3E%3A+2849-2871.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1175%2Fjpo-d-20-0086.1%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1175%2Fjpo-d-20-0086.1%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftnioz https://doi.org/10.1175/jpo-d-20-0086.1 2022-05-01T14:12:59Z The structure, transport, and seasonal variability of the West Greenland boundary current system near Cape Farewell are investigated using a high-resolution mooring array deployed from 2014 to 2018. The boundary current system is comprised of three components: the West Greenland Coastal Current, which advects cold and fresh Upper Polar Water (UPW); the West Greenland Current, which transports warm and salty Irminger Water (IW) along the upper slope and UPW at the surface; and the Deep Western Boundary Current, which advects dense overflow waters. Labrador Sea Water (LSW) is prevalent at the seaward side of the array within an offshore recirculation gyre and at the base of the West Greenland Current. The 4-yr mean transport of the full boundary current system is 31.1 ± 7.4 Sv (1 Sv ≡ 10 6 m 3 s −1 ), with no clear seasonal signal. However, the individual water mass components exhibit seasonal cycles in hydrographic properties and transport. LSW penetrates the boundary current locally, through entrainment/mixing from the adjacent recirculation gyre, and also enters the current upstream in the Irminger Sea. IW is modified through air–sea interaction during winter along the length of its trajectory around the Irminger Sea, which converts some of the water to LSW. This, together with the seasonal increase in LSW entering the current, results in an anticorrelation in transport between these two water masses. The seasonality in UPW transport can be explained by remote wind forcing and subsequent adjustment via coastal trapped waves. Our results provide the first quantitatively robust observational description of the boundary current in the eastern Labrador Sea. Article in Journal/Newspaper Cape Farewell Greenland Labrador Sea NIOZ Repository (Royal Netherlands Institute for Sea Research) Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Journal of Physical Oceanography 50 10 2849 2871 |
institution |
Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
The structure, transport, and seasonal variability of the West Greenland boundary current system near Cape Farewell are investigated using a high-resolution mooring array deployed from 2014 to 2018. The boundary current system is comprised of three components: the West Greenland Coastal Current, which advects cold and fresh Upper Polar Water (UPW); the West Greenland Current, which transports warm and salty Irminger Water (IW) along the upper slope and UPW at the surface; and the Deep Western Boundary Current, which advects dense overflow waters. Labrador Sea Water (LSW) is prevalent at the seaward side of the array within an offshore recirculation gyre and at the base of the West Greenland Current. The 4-yr mean transport of the full boundary current system is 31.1 ± 7.4 Sv (1 Sv ≡ 10 6 m 3 s −1 ), with no clear seasonal signal. However, the individual water mass components exhibit seasonal cycles in hydrographic properties and transport. LSW penetrates the boundary current locally, through entrainment/mixing from the adjacent recirculation gyre, and also enters the current upstream in the Irminger Sea. IW is modified through air–sea interaction during winter along the length of its trajectory around the Irminger Sea, which converts some of the water to LSW. This, together with the seasonal increase in LSW entering the current, results in an anticorrelation in transport between these two water masses. The seasonality in UPW transport can be explained by remote wind forcing and subsequent adjustment via coastal trapped waves. Our results provide the first quantitatively robust observational description of the boundary current in the eastern Labrador Sea. |
format |
Article in Journal/Newspaper |
author |
Pacini, A. Pickart, R.S. Bahr, F. Torres, D.J. Ramsey, A.L. Holte, J. Karstensen, J. Oltmanns, M. Straneo, F. Le Bras, I.A. Moore, G.W.K. de Jong, M.F. |
spellingShingle |
Pacini, A. Pickart, R.S. Bahr, F. Torres, D.J. Ramsey, A.L. Holte, J. Karstensen, J. Oltmanns, M. Straneo, F. Le Bras, I.A. Moore, G.W.K. de Jong, M.F. Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell |
author_facet |
Pacini, A. Pickart, R.S. Bahr, F. Torres, D.J. Ramsey, A.L. Holte, J. Karstensen, J. Oltmanns, M. Straneo, F. Le Bras, I.A. Moore, G.W.K. de Jong, M.F. |
author_sort |
Pacini, A. |
title |
Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell |
title_short |
Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell |
title_full |
Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell |
title_fullStr |
Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell |
title_full_unstemmed |
Mean conditions and seasonality of the West Greenland boundary current system near Cape Farewell |
title_sort |
mean conditions and seasonality of the west greenland boundary current system near cape farewell |
publishDate |
2020 |
url |
http://imis.nioz.nl/imis.php?module=ref&refid=330779 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Greenland Irminger Sea |
geographic_facet |
Greenland Irminger Sea |
genre |
Cape Farewell Greenland Labrador Sea |
genre_facet |
Cape Farewell Greenland Labrador Sea |
op_source |
%3Ci%3EJ.+Phys.+Oceanogr.+50%2810%29%3C%2Fi%3E%3A+2849-2871.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.1175%2Fjpo-d-20-0086.1%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.1175%2Fjpo-d-20-0086.1%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000589826300004 info:eu-repo/semantics/altIdentifier/doi/.org/10.1175/jpo-d-20-0086.1 http://imis.nioz.nl/imis.php?module=ref&refid=330779 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1175/jpo-d-20-0086.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
50 |
container_issue |
10 |
container_start_page |
2849 |
op_container_end_page |
2871 |
_version_ |
1766387201209270272 |