Sea surface salinity as a proxy for Arctic Ocean freshwater changes
The changing Arctic freshwater content and distribution have significant implications for ocean circulation, climate, and water and biogeochemical cycles. The paucity of in‐situ salinity measurements in the Arctic Ocean has limited our ability to study Arctic‐Ocean freshwater variability. Although s...
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ftarchimer:oai:archimer.ifremer.fr:74164 2023-05-15T14:29:14+02:00 Sea surface salinity as a proxy for Arctic Ocean freshwater changes Fournier, Severine Lee, Tong Wang, Xiaochun Armitage, Thomas W. K. Wang, Ou Fukumori, Ichiro Kwok, Ron 2020-07 application/pdf https://archimer.ifremer.fr/doc/00630/74164/73778.pdf https://doi.org/10.1029/2020JC016110 https://archimer.ifremer.fr/doc/00630/74164/ eng eng American Geophysical Union (AGU) https://archimer.ifremer.fr/doc/00630/74164/73778.pdf doi:10.1029/2020JC016110 https://archimer.ifremer.fr/doc/00630/74164/ info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2020-07 , Vol. 125 , N. 7 , P. e2020JC016110 (13p.) Arctic sea surface height gravimetry sea surface salinity freshwater text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.1029/2020JC016110 2023-03-14T23:55:18Z The changing Arctic freshwater content and distribution have significant implications for ocean circulation, climate, and water and biogeochemical cycles. The paucity of in‐situ salinity measurements in the Arctic Ocean has limited our ability to study Arctic‐Ocean freshwater variability. Although satellite‐derived sea surface height (SSH) and ocean bottom pressure (OBP) have been used together to infer depth‐integrated freshwater content changes, these measurements are limited in sampling and resolution. Motivated by the recent development of sea surface salinity (SSS) remote sensing, we explore the use of SSS as a proxy for Arctic freshwater changes. As a first step, here we conduct a proof‐of‐concept study by analyzing the output of an ocean‐ice state estimation product. We find that SSS variations are coherent with those of SSH‐minus‐OBP across the Arctic basin (with R ~ ‐0.8) except for in the center of the Beaufort Gyre and the region affected by the subpolar North Atlantic inflow. On Arctic shelves, the linear regression coefficient between SSS and SSH‐minus‐OBP is ‐0.3 pss/cm or larger in magnitude. The results suggest that SSS is a good proxy for Arctic freshwater changes, and satellite SSH‐minus‐OBP can be used to evaluate satellite SSS quality. Article in Journal/Newspaper Arctic Basin Arctic Arctic Ocean North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Arctic Ocean Journal of Geophysical Research: Oceans 125 7 |
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 |
Arctic sea surface height gravimetry sea surface salinity freshwater |
spellingShingle |
Arctic sea surface height gravimetry sea surface salinity freshwater Fournier, Severine Lee, Tong Wang, Xiaochun Armitage, Thomas W. K. Wang, Ou Fukumori, Ichiro Kwok, Ron Sea surface salinity as a proxy for Arctic Ocean freshwater changes |
topic_facet |
Arctic sea surface height gravimetry sea surface salinity freshwater |
description |
The changing Arctic freshwater content and distribution have significant implications for ocean circulation, climate, and water and biogeochemical cycles. The paucity of in‐situ salinity measurements in the Arctic Ocean has limited our ability to study Arctic‐Ocean freshwater variability. Although satellite‐derived sea surface height (SSH) and ocean bottom pressure (OBP) have been used together to infer depth‐integrated freshwater content changes, these measurements are limited in sampling and resolution. Motivated by the recent development of sea surface salinity (SSS) remote sensing, we explore the use of SSS as a proxy for Arctic freshwater changes. As a first step, here we conduct a proof‐of‐concept study by analyzing the output of an ocean‐ice state estimation product. We find that SSS variations are coherent with those of SSH‐minus‐OBP across the Arctic basin (with R ~ ‐0.8) except for in the center of the Beaufort Gyre and the region affected by the subpolar North Atlantic inflow. On Arctic shelves, the linear regression coefficient between SSS and SSH‐minus‐OBP is ‐0.3 pss/cm or larger in magnitude. The results suggest that SSS is a good proxy for Arctic freshwater changes, and satellite SSH‐minus‐OBP can be used to evaluate satellite SSS quality. |
format |
Article in Journal/Newspaper |
author |
Fournier, Severine Lee, Tong Wang, Xiaochun Armitage, Thomas W. K. Wang, Ou Fukumori, Ichiro Kwok, Ron |
author_facet |
Fournier, Severine Lee, Tong Wang, Xiaochun Armitage, Thomas W. K. Wang, Ou Fukumori, Ichiro Kwok, Ron |
author_sort |
Fournier, Severine |
title |
Sea surface salinity as a proxy for Arctic Ocean freshwater changes |
title_short |
Sea surface salinity as a proxy for Arctic Ocean freshwater changes |
title_full |
Sea surface salinity as a proxy for Arctic Ocean freshwater changes |
title_fullStr |
Sea surface salinity as a proxy for Arctic Ocean freshwater changes |
title_full_unstemmed |
Sea surface salinity as a proxy for Arctic Ocean freshwater changes |
title_sort |
sea surface salinity as a proxy for arctic ocean freshwater changes |
publisher |
American Geophysical Union (AGU) |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00630/74164/73778.pdf https://doi.org/10.1029/2020JC016110 https://archimer.ifremer.fr/doc/00630/74164/ |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Basin Arctic Arctic Ocean North Atlantic |
genre_facet |
Arctic Basin Arctic Arctic Ocean North Atlantic |
op_source |
Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2020-07 , Vol. 125 , N. 7 , P. e2020JC016110 (13p.) |
op_relation |
https://archimer.ifremer.fr/doc/00630/74164/73778.pdf doi:10.1029/2020JC016110 https://archimer.ifremer.fr/doc/00630/74164/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2020JC016110 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
7 |
_version_ |
1766303297804697600 |