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 su...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/516191/ https://nora.nerc.ac.uk/id/eprint/516191/1/Benetti_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2016JC012244 |
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ftnerc:oai:nora.nerc.ac.uk:516191 2023-05-15T14:53:36+02:00 Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope Benetti, M. Reverdin, G. Lique, C. Yashayaev, I. Holliday, N.P. Tynan, E. Torres-valdes, S. Lherminier, P. Tréguer, P. Sarthou, G. 2017-02 text http://nora.nerc.ac.uk/id/eprint/516191/ https://nora.nerc.ac.uk/id/eprint/516191/1/Benetti_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2016JC012244 en eng https://nora.nerc.ac.uk/id/eprint/516191/1/Benetti_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf Benetti, M.; Reverdin, G.; Lique, C.; Yashayaev, I.; Holliday, N.P. orcid:0000-0002-9733-8002 Tynan, E.; Torres-valdes, S.; Lherminier, P.; Tréguer, P.; Sarthou, G. 2017 Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope. Journal of Geophysical Research: Oceans, 122 (2). https://doi.org/10.1002/2016JC012244 <https://doi.org/10.1002/2016JC012244> Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1002/2016JC012244 2023-02-04T19:44:28Z 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 midshelf 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 midshelf between 55°N and 52°N. Very freshwater 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 Natural Environment Research Council: NERC Open Research Archive Arctic Baffin Bay Greenland Pacific Labrador Shelf ENVELOPE(-58.000,-58.000,56.000,56.000) Journal of Geophysical Research: Oceans 122 2 1102 1121 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
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 midshelf 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 midshelf between 55°N and 52°N. Very freshwater 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, C. Yashayaev, I. Holliday, N.P. Tynan, E. Torres-valdes, S. Lherminier, P. Tréguer, P. Sarthou, G. |
spellingShingle |
Benetti, M. Reverdin, G. Lique, C. Yashayaev, I. Holliday, N.P. Tynan, E. Torres-valdes, S. Lherminier, P. Tréguer, 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, C. Yashayaev, I. Holliday, N.P. Tynan, E. Torres-valdes, S. Lherminier, P. Tréguer, 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 |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/516191/ https://nora.nerc.ac.uk/id/eprint/516191/1/Benetti_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2016JC012244 |
long_lat |
ENVELOPE(-58.000,-58.000,56.000,56.000) |
geographic |
Arctic Baffin Bay Greenland Pacific Labrador Shelf |
geographic_facet |
Arctic Baffin Bay Greenland Pacific Labrador Shelf |
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_relation |
https://nora.nerc.ac.uk/id/eprint/516191/1/Benetti_et_al-2017-Journal_of_Geophysical_Research__Oceans.pdf Benetti, M.; Reverdin, G.; Lique, C.; Yashayaev, I.; Holliday, N.P. orcid:0000-0002-9733-8002 Tynan, E.; Torres-valdes, S.; Lherminier, P.; Tréguer, P.; Sarthou, G. 2017 Composition of freshwater in the spring of 2014 on the southern Labrador shelf and slope. Journal of Geophysical Research: Oceans, 122 (2). https://doi.org/10.1002/2016JC012244 <https://doi.org/10.1002/2016JC012244> |
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_ |
1766325212492595200 |