Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic
The variability of two modes of Labrador Sea Water (LSW) (upper and deep Labrador Sea Water) and their respective spreading in the interior North Atlantic Ocean are investigated by means of repeated ship surveys carried out along the zonal WOCE line A2/AR19 located at 43–48°N (1993–2007) and along t...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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ftoceanrep:oai:oceanrep.geomar.de:1208 2024-09-30T14:38:11+00:00 Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic Kieke, Dagmar Klein, Birgit Stramma, Lothar Rhein, Monika Koltermann, K. P. 2009 text https://oceanrep.geomar.de/id/eprint/1208/ https://oceanrep.geomar.de/id/eprint/1208/1/1-s2.0-S0967063709001058-main.pdf https://doi.org/10.1016/j.dsr.2009.05.010 en eng Elsevier https://oceanrep.geomar.de/id/eprint/1208/1/1-s2.0-S0967063709001058-main.pdf Kieke, D., Klein, B., Stramma, L. , Rhein, M. and Koltermann, K. P. (2009) Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic. Deep Sea Research Part I: Oceanographic Research Papers, 56 . pp. 1656-1674. DOI 10.1016/j.dsr.2009.05.010 <https://doi.org/10.1016/j.dsr.2009.05.010>. doi:10.1016/j.dsr.2009.05.010 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2009 ftoceanrep https://doi.org/10.1016/j.dsr.2009.05.010 2024-09-04T05:04:40Z The variability of two modes of Labrador Sea Water (LSW) (upper and deep Labrador Sea Water) and their respective spreading in the interior North Atlantic Ocean are investigated by means of repeated ship surveys carried out along the zonal WOCE line A2/AR19 located at 43–48°N (1993–2007) and along the GOOS line at about 48–51°N (1997–2002). Hydrographic section data are complemented by temperature, salinity, and velocity time series recorded by two moorings. They have been deployed at the western flank of the Mid-Atlantic Ridge (MAR) in the Newfoundland Basin during 1996–2004. The analysis of hydrographic anomalies at various longitudes points to a gradual eastward propagation of LSW-related signals, which happens on time scales of 3–6 years from the formation region towards the MAR. Interactions of the North Atlantic Current (NAC) with the Deep Western Boundary Current (DWBC) close to Flemish Cap point to the NAC being the main distributor of the different types of LSW into the interior of the Newfoundland Basin. Comparisons between the ship data and the mooring records revealed that the mooring sites are located in a region affected by highly variable flow. The mooring time series demonstrate an elevated level of variability with eddy activity and variability associated with the NAC considerably influencing the LSW signals in this region. Hydrographic data taken from Argo profiles from the vicinity of the mooring sites turned out to mimic quite well the temporal evolution captured by the moorings. There is some indication of occasional southward flow in the LSW layer near the MAR. If this can be considered as a hint to an interior LSW-route, it is at least of minor importance in comparison to the DWBC. It acts as an important supplier for the interior North Atlantic, distributing older and recently formed LSW modes southward along the MAR. Article in Journal/Newspaper Labrador Sea Newfoundland north atlantic current North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Mid-Atlantic Ridge Newfoundland Deep Sea Research Part I: Oceanographic Research Papers 56 10 1656 1674 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The variability of two modes of Labrador Sea Water (LSW) (upper and deep Labrador Sea Water) and their respective spreading in the interior North Atlantic Ocean are investigated by means of repeated ship surveys carried out along the zonal WOCE line A2/AR19 located at 43–48°N (1993–2007) and along the GOOS line at about 48–51°N (1997–2002). Hydrographic section data are complemented by temperature, salinity, and velocity time series recorded by two moorings. They have been deployed at the western flank of the Mid-Atlantic Ridge (MAR) in the Newfoundland Basin during 1996–2004. The analysis of hydrographic anomalies at various longitudes points to a gradual eastward propagation of LSW-related signals, which happens on time scales of 3–6 years from the formation region towards the MAR. Interactions of the North Atlantic Current (NAC) with the Deep Western Boundary Current (DWBC) close to Flemish Cap point to the NAC being the main distributor of the different types of LSW into the interior of the Newfoundland Basin. Comparisons between the ship data and the mooring records revealed that the mooring sites are located in a region affected by highly variable flow. The mooring time series demonstrate an elevated level of variability with eddy activity and variability associated with the NAC considerably influencing the LSW signals in this region. Hydrographic data taken from Argo profiles from the vicinity of the mooring sites turned out to mimic quite well the temporal evolution captured by the moorings. There is some indication of occasional southward flow in the LSW layer near the MAR. If this can be considered as a hint to an interior LSW-route, it is at least of minor importance in comparison to the DWBC. It acts as an important supplier for the interior North Atlantic, distributing older and recently formed LSW modes southward along the MAR. |
format |
Article in Journal/Newspaper |
author |
Kieke, Dagmar Klein, Birgit Stramma, Lothar Rhein, Monika Koltermann, K. P. |
spellingShingle |
Kieke, Dagmar Klein, Birgit Stramma, Lothar Rhein, Monika Koltermann, K. P. Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic |
author_facet |
Kieke, Dagmar Klein, Birgit Stramma, Lothar Rhein, Monika Koltermann, K. P. |
author_sort |
Kieke, Dagmar |
title |
Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic |
title_short |
Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic |
title_full |
Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic |
title_fullStr |
Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic |
title_full_unstemmed |
Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic |
title_sort |
variability and propagation of labrador sea water in the southern subpolar north atlantic |
publisher |
Elsevier |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/1208/ https://oceanrep.geomar.de/id/eprint/1208/1/1-s2.0-S0967063709001058-main.pdf https://doi.org/10.1016/j.dsr.2009.05.010 |
geographic |
Mid-Atlantic Ridge Newfoundland |
geographic_facet |
Mid-Atlantic Ridge Newfoundland |
genre |
Labrador Sea Newfoundland north atlantic current North Atlantic |
genre_facet |
Labrador Sea Newfoundland north atlantic current North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/1208/1/1-s2.0-S0967063709001058-main.pdf Kieke, D., Klein, B., Stramma, L. , Rhein, M. and Koltermann, K. P. (2009) Variability and propagation of Labrador Sea Water in the southern subpolar North Atlantic. Deep Sea Research Part I: Oceanographic Research Papers, 56 . pp. 1656-1674. DOI 10.1016/j.dsr.2009.05.010 <https://doi.org/10.1016/j.dsr.2009.05.010>. doi:10.1016/j.dsr.2009.05.010 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2009.05.010 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
56 |
container_issue |
10 |
container_start_page |
1656 |
op_container_end_page |
1674 |
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1811640892670345216 |