Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea
Storfjorden, Svalbard, hosts a polynya in winter and is an important source region of Brine-enriched Shelf Water (BSW) that, if dense enough, feeds the Arctic Ocean deep water reservoir. Changes in the BSW production may thus have far-reaching impacts. We analyze the water mass distribution and circ...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union (AGU)
2023
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Online Access: | https://archimer.ifremer.fr/doc/00819/93081/99550.pdf https://archimer.ifremer.fr/doc/00819/93081/99551.pdf https://doi.org/10.1029/2022JC018648 https://archimer.ifremer.fr/doc/00819/93081/ |
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ftarchimer:oai:archimer.ifremer.fr:93081 2023-12-24T10:13:43+01:00 Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea Vivier, Frédéric Lourenço, Antonio Michel, Elisabeth Skogseth, Ragnheid Rousset, Clément Lansard, Bruno Bouruet‐aubertot, Pascale Boutin, Jacqueline Bombled, Bruno Cuypers, Yannis Crispi, Olivier Dausse, Dennis Le Goff, Hervé Madec, Gurvan Vancoppenolle, Martin Van Der Linden, Fanny Waelbroeck, Claire 2023-02 application/pdf https://archimer.ifremer.fr/doc/00819/93081/99550.pdf https://archimer.ifremer.fr/doc/00819/93081/99551.pdf https://doi.org/10.1029/2022JC018648 https://archimer.ifremer.fr/doc/00819/93081/ eng eng American Geophysical Union (AGU) https://archimer.ifremer.fr/doc/00819/93081/99550.pdf https://archimer.ifremer.fr/doc/00819/93081/99551.pdf doi:10.1029/2022JC018648 https://archimer.ifremer.fr/doc/00819/93081/ info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2023-02 , Vol. 128 , N. 2 , P. e2022JC018648 (26p.) Storfjord Svalbard Arctic Barents Sea BSW Atlantification text Article info:eu-repo/semantics/article 2023 ftarchimer https://doi.org/10.1029/2022JC018648 2023-11-28T23:51:10Z Storfjorden, Svalbard, hosts a polynya in winter and is an important source region of Brine-enriched Shelf Water (BSW) that, if dense enough, feeds the Arctic Ocean deep water reservoir. Changes in the BSW production may thus have far-reaching impacts. We analyze the water mass distribution and circulation in Storfjorden and the trough south of it, Storfjordrenna, using hydrographic sections occupied in July 2016, following a winter characterized by the lowest ice coverage recorded in the Barents Sea. These observations reveal an unusual hydrographic state, characterized at the surface by the near absence of Melt Water and Storfjorden Surface Water, replaced by a saltier water mass. At depth, BSW (maximum salinity of 34.95) was found from the bottom up to 90 m, above the 120-m deep sill at the mouth to Storfjordrenna. However, no gravity driven overflow was observed downstream of the sill: the dome of BSW remained locked over the depression in a cyclonic circulation pattern consistent with a stratified Taylor column. Observations further reveal a previously unreported intrusion of Atlantic Water far into the fjord, promoting isopycnal mixing with entrapped Arctic Water. This intrusion was possibly favored by positive wind stress curl anomalies over Svalbardbanken and Storfjordrenna. The bottom plume exiting Storfjordrenna was weak, carrying Polar Front Water rather than BSW, too light to sink underneath the Atlantic Water layer at Fram Strait. Whether Storfjorden switched durably to a new hydrographic state, following the observed Atlantification of the Barents Sea after 2005, remains to be established. Key Points Changes in the hydrography and circulation in Storfjorden a decade after a regime shift in the Barents Sea linked to its Atlantification The less saline Brine-enriched Shelf Water remained entrapped in Storfjorden within a cyclonic circulation pattern with no overflow Storfjorden was flooded with Atlantic Water, promoting isopycnal mixing with Arctic Water and the local formation of East Spitsbergen ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Fram Strait Sea ice Storfjorden Storfjordrenna Svalbard Svalbardbanken Spitsbergen Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Arctic Ocean Svalbard Barents Sea Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) Storfjordrenna ENVELOPE(17.000,17.000,76.000,76.000) Journal of Geophysical Research: Oceans 128 2 |
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 |
topic |
Storfjord Svalbard Arctic Barents Sea BSW Atlantification |
spellingShingle |
Storfjord Svalbard Arctic Barents Sea BSW Atlantification Vivier, Frédéric Lourenço, Antonio Michel, Elisabeth Skogseth, Ragnheid Rousset, Clément Lansard, Bruno Bouruet‐aubertot, Pascale Boutin, Jacqueline Bombled, Bruno Cuypers, Yannis Crispi, Olivier Dausse, Dennis Le Goff, Hervé Madec, Gurvan Vancoppenolle, Martin Van Der Linden, Fanny Waelbroeck, Claire Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea |
topic_facet |
Storfjord Svalbard Arctic Barents Sea BSW Atlantification |
description |
Storfjorden, Svalbard, hosts a polynya in winter and is an important source region of Brine-enriched Shelf Water (BSW) that, if dense enough, feeds the Arctic Ocean deep water reservoir. Changes in the BSW production may thus have far-reaching impacts. We analyze the water mass distribution and circulation in Storfjorden and the trough south of it, Storfjordrenna, using hydrographic sections occupied in July 2016, following a winter characterized by the lowest ice coverage recorded in the Barents Sea. These observations reveal an unusual hydrographic state, characterized at the surface by the near absence of Melt Water and Storfjorden Surface Water, replaced by a saltier water mass. At depth, BSW (maximum salinity of 34.95) was found from the bottom up to 90 m, above the 120-m deep sill at the mouth to Storfjordrenna. However, no gravity driven overflow was observed downstream of the sill: the dome of BSW remained locked over the depression in a cyclonic circulation pattern consistent with a stratified Taylor column. Observations further reveal a previously unreported intrusion of Atlantic Water far into the fjord, promoting isopycnal mixing with entrapped Arctic Water. This intrusion was possibly favored by positive wind stress curl anomalies over Svalbardbanken and Storfjordrenna. The bottom plume exiting Storfjordrenna was weak, carrying Polar Front Water rather than BSW, too light to sink underneath the Atlantic Water layer at Fram Strait. Whether Storfjorden switched durably to a new hydrographic state, following the observed Atlantification of the Barents Sea after 2005, remains to be established. Key Points Changes in the hydrography and circulation in Storfjorden a decade after a regime shift in the Barents Sea linked to its Atlantification The less saline Brine-enriched Shelf Water remained entrapped in Storfjorden within a cyclonic circulation pattern with no overflow Storfjorden was flooded with Atlantic Water, promoting isopycnal mixing with Arctic Water and the local formation of East Spitsbergen ... |
format |
Article in Journal/Newspaper |
author |
Vivier, Frédéric Lourenço, Antonio Michel, Elisabeth Skogseth, Ragnheid Rousset, Clément Lansard, Bruno Bouruet‐aubertot, Pascale Boutin, Jacqueline Bombled, Bruno Cuypers, Yannis Crispi, Olivier Dausse, Dennis Le Goff, Hervé Madec, Gurvan Vancoppenolle, Martin Van Der Linden, Fanny Waelbroeck, Claire |
author_facet |
Vivier, Frédéric Lourenço, Antonio Michel, Elisabeth Skogseth, Ragnheid Rousset, Clément Lansard, Bruno Bouruet‐aubertot, Pascale Boutin, Jacqueline Bombled, Bruno Cuypers, Yannis Crispi, Olivier Dausse, Dennis Le Goff, Hervé Madec, Gurvan Vancoppenolle, Martin Van Der Linden, Fanny Waelbroeck, Claire |
author_sort |
Vivier, Frédéric |
title |
Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea |
title_short |
Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea |
title_full |
Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea |
title_fullStr |
Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea |
title_full_unstemmed |
Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea‐ice extent in the Barents Sea |
title_sort |
summer hydrography and circulation in storfjorden, svalbard, following a record low winter sea‐ice extent in the barents sea |
publisher |
American Geophysical Union (AGU) |
publishDate |
2023 |
url |
https://archimer.ifremer.fr/doc/00819/93081/99550.pdf https://archimer.ifremer.fr/doc/00819/93081/99551.pdf https://doi.org/10.1029/2022JC018648 https://archimer.ifremer.fr/doc/00819/93081/ |
long_lat |
ENVELOPE(-63.071,-63.071,-70.797,-70.797) ENVELOPE(17.000,17.000,76.000,76.000) |
geographic |
Arctic Arctic Ocean Svalbard Barents Sea Curl Storfjordrenna |
geographic_facet |
Arctic Arctic Ocean Svalbard Barents Sea Curl Storfjordrenna |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait Sea ice Storfjorden Storfjordrenna Svalbard Svalbardbanken Spitsbergen |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait Sea ice Storfjorden Storfjordrenna Svalbard Svalbardbanken Spitsbergen |
op_source |
Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2023-02 , Vol. 128 , N. 2 , P. e2022JC018648 (26p.) |
op_relation |
https://archimer.ifremer.fr/doc/00819/93081/99550.pdf https://archimer.ifremer.fr/doc/00819/93081/99551.pdf doi:10.1029/2022JC018648 https://archimer.ifremer.fr/doc/00819/93081/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2022JC018648 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
128 |
container_issue |
2 |
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1786185253269798912 |