Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope
The Labrador Current is an important conduit of freshwater from the Arctic to the interior North Atlantic subpolar gyre. Here, we investigate the spatial variability of the freshwater sources over the southern Labrador shelf and slope during May-June 2014. Using measurements of seawater properties s...
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ftarchimer:oai:archimer.ifremer.fr:47667 2023-05-15T14:53:37+02:00 Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope Benetti, M. Reverdin, G. Lique, Camille Yashayaev, I. Holliday, N. P. Tynan, E. Torres-valdes, S. Lherminier, Pascale Treguer, P. Sarthou, G. 2017-02 application/pdf https://archimer.ifremer.fr/doc/00365/47667/47778.pdf https://doi.org/10.1002/2016JC012244 https://archimer.ifremer.fr/doc/00365/47667/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00365/47667/47778.pdf doi:10.1002/2016JC012244 https://archimer.ifremer.fr/doc/00365/47667/ 2017. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2017-02 , Vol. 122 , N. 2 , P. 1102-1121 text Publication info:eu-repo/semantics/article 2017 ftarchimer https://doi.org/10.1002/2016JC012244 2021-09-23T20:29:07Z The Labrador Current is an important conduit of freshwater from the Arctic to the interior North Atlantic subpolar gyre. Here, we investigate the spatial variability of the freshwater sources over the southern Labrador shelf and slope during May-June 2014. Using measurements of seawater properties such as temperature, salinity, nutrients and oxygen isotopic composition, we estimate the respective contributions of saline water of Atlantic and Pacific origins, of brines released during sea ice formation, and of freshwater from sea ice melt and meteoric water origins. On the southern Labrador shelf, we find a large brine signal and Pacific Water influence indicating a large contribution of water from the Canadian Arctic. The brine signal implies that more than 4 m of sea ice formed upstream, either in the Arctic or in Baffin Bay and the northern Labrador Sea. Over the mid-shelf and slope at 52°N, we find a stronger influence of slope water from the West Greenland Current with a smaller contribution of Pacific water and no brine signal. Thus, there is advection of water from the slope region to the mid-shelf between 55°N and 52°N. Very fresh water with high meteoric content is found close to the coast in June 2014. Observations from 1995 and 2008 suggest a higher fraction of brine and Pacific water on the shelf compared to that observed in 2014. Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Greenland Labrador Sea North Atlantic Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Baffin Bay Greenland Labrador Shelf ENVELOPE(-58.000,-58.000,56.000,56.000) Pacific Journal of Geophysical Research: Oceans 122 2 1102 1121 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The Labrador Current is an important conduit of freshwater from the Arctic to the interior North Atlantic subpolar gyre. Here, we investigate the spatial variability of the freshwater sources over the southern Labrador shelf and slope during May-June 2014. Using measurements of seawater properties such as temperature, salinity, nutrients and oxygen isotopic composition, we estimate the respective contributions of saline water of Atlantic and Pacific origins, of brines released during sea ice formation, and of freshwater from sea ice melt and meteoric water origins. On the southern Labrador shelf, we find a large brine signal and Pacific Water influence indicating a large contribution of water from the Canadian Arctic. The brine signal implies that more than 4 m of sea ice formed upstream, either in the Arctic or in Baffin Bay and the northern Labrador Sea. Over the mid-shelf and slope at 52°N, we find a stronger influence of slope water from the West Greenland Current with a smaller contribution of Pacific water and no brine signal. Thus, there is advection of water from the slope region to the mid-shelf between 55°N and 52°N. Very fresh water with high meteoric content is found close to the coast in June 2014. Observations from 1995 and 2008 suggest a higher fraction of brine and Pacific water on the shelf compared to that observed in 2014. |
format |
Article in Journal/Newspaper |
author |
Benetti, M. Reverdin, G. Lique, Camille Yashayaev, I. Holliday, N. P. Tynan, E. Torres-valdes, S. Lherminier, Pascale Treguer, P. Sarthou, G. |
spellingShingle |
Benetti, M. Reverdin, G. Lique, Camille Yashayaev, I. Holliday, N. P. Tynan, E. Torres-valdes, S. Lherminier, Pascale Treguer, P. Sarthou, G. Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope |
author_facet |
Benetti, M. Reverdin, G. Lique, Camille Yashayaev, I. Holliday, N. P. Tynan, E. Torres-valdes, S. Lherminier, Pascale Treguer, P. Sarthou, G. |
author_sort |
Benetti, M. |
title |
Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope |
title_short |
Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope |
title_full |
Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope |
title_fullStr |
Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope |
title_full_unstemmed |
Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope |
title_sort |
composition of freshwater in the spring of 2014 on the southern labrador shelf and slope |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://archimer.ifremer.fr/doc/00365/47667/47778.pdf https://doi.org/10.1002/2016JC012244 https://archimer.ifremer.fr/doc/00365/47667/ |
long_lat |
ENVELOPE(-58.000,-58.000,56.000,56.000) |
geographic |
Arctic Baffin Bay Greenland Labrador Shelf Pacific |
geographic_facet |
Arctic Baffin Bay Greenland Labrador Shelf Pacific |
genre |
Arctic Baffin Bay Baffin Bay Baffin Greenland Labrador Sea North Atlantic Sea ice |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Greenland Labrador Sea North Atlantic Sea ice |
op_source |
Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2017-02 , Vol. 122 , N. 2 , P. 1102-1121 |
op_relation |
https://archimer.ifremer.fr/doc/00365/47667/47778.pdf doi:10.1002/2016JC012244 https://archimer.ifremer.fr/doc/00365/47667/ |
op_rights |
2017. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2016JC012244 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
2 |
container_start_page |
1102 |
op_container_end_page |
1121 |
_version_ |
1766325217090600960 |