The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates
This paper presents the first estimate of the seasonal cycle of ocean and sea ice heat and freshwater (FW) fluxes around the Arctic Ocean boundary. The ocean transports are estimated primarily using 138 moored instruments deployed in September 2005–August 2006 across the four main Arctic gateways: D...
Published in: | Journal of Physical Oceanography |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/521492/ https://nora.nerc.ac.uk/id/eprint/521492/1/jpo-d-17-0239.1.pdf https://doi.org/10.1175/JPO-D-17-0239.1 |
id |
ftnerc:oai:nora.nerc.ac.uk:521492 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:521492 2023-05-15T14:27:32+02:00 The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates Tsubouchi, Takamasa Bacon, Sheldon Aksenov, Yevgeny Naveira Garabato, Alberto C. Beszczynska-Möller, Agnieszka Hansen, Edmond de Steur, Laura Curry, Beth Lee, Craig M. 2018 text http://nora.nerc.ac.uk/id/eprint/521492/ https://nora.nerc.ac.uk/id/eprint/521492/1/jpo-d-17-0239.1.pdf https://doi.org/10.1175/JPO-D-17-0239.1 en eng https://nora.nerc.ac.uk/id/eprint/521492/1/jpo-d-17-0239.1.pdf Tsubouchi, Takamasa; Bacon, Sheldon orcid:0000-0002-2471-9373 Aksenov, Yevgeny orcid:0000-0001-6132-3434 Naveira Garabato, Alberto C.; Beszczynska-Möller, Agnieszka; Hansen, Edmond; de Steur, Laura; Curry, Beth; Lee, Craig M. 2018 The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates. Journal of Physical Oceanography, 48 (9). 2029-2055. https://doi.org/10.1175/JPO-D-17-0239.1 <https://doi.org/10.1175/JPO-D-17-0239.1> Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1175/JPO-D-17-0239.1 2023-02-04T19:47:20Z This paper presents the first estimate of the seasonal cycle of ocean and sea ice heat and freshwater (FW) fluxes around the Arctic Ocean boundary. The ocean transports are estimated primarily using 138 moored instruments deployed in September 2005–August 2006 across the four main Arctic gateways: Davis, Fram, and Bering Straits, and the Barents Sea Opening (BSO). Sea ice transports are estimated from a sea ice assimilation product. Monthly velocity fields are calculated with a box inverse model that enforces mass and salt conservation. The volume transports in the four gateways in the period (annual mean ± 1 standard deviation) are −2.1 ± 0.7 Sv in Davis Strait, −1.1 ± 1.2 Sv in Fram Strait, 2.3 ± 1.2 Sv in the BSO, and 0.7 ± 0.7 Sv in Bering Strait (1 Sv ≡ 106 m3 s−1). The resulting ocean and sea ice heat and FW fluxes are 175 ± 48 TW and 204 ± 85 mSv, respectively. These boundary fluxes accurately represent the annual means of the relevant surface fluxes. The ocean heat transport variability derives from velocity variability in the Atlantic Water layer and temperature variability in the upper part of the water column. The ocean FW transport variability is dominated by Bering Strait velocity variability. The net water mass transformation in the Arctic entails a freshening and cooling of inflowing waters by 0.62 ± 0.23 in salinity and 3.74° ± 0.76°C in temperature, respectively, and a reduction in density by 0.23 ± 0.20 kg m−3. The boundary heat and FW fluxes provide a benchmark dataset for the validation of numerical models and atmospheric reanalysis products. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea Bering Strait Davis Strait Fram Strait Sea ice Natural Environment Research Council: NERC Open Research Archive Arctic Arctic Ocean Barents Sea Bering Strait Journal of Physical Oceanography 48 9 2029 2055 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
This paper presents the first estimate of the seasonal cycle of ocean and sea ice heat and freshwater (FW) fluxes around the Arctic Ocean boundary. The ocean transports are estimated primarily using 138 moored instruments deployed in September 2005–August 2006 across the four main Arctic gateways: Davis, Fram, and Bering Straits, and the Barents Sea Opening (BSO). Sea ice transports are estimated from a sea ice assimilation product. Monthly velocity fields are calculated with a box inverse model that enforces mass and salt conservation. The volume transports in the four gateways in the period (annual mean ± 1 standard deviation) are −2.1 ± 0.7 Sv in Davis Strait, −1.1 ± 1.2 Sv in Fram Strait, 2.3 ± 1.2 Sv in the BSO, and 0.7 ± 0.7 Sv in Bering Strait (1 Sv ≡ 106 m3 s−1). The resulting ocean and sea ice heat and FW fluxes are 175 ± 48 TW and 204 ± 85 mSv, respectively. These boundary fluxes accurately represent the annual means of the relevant surface fluxes. The ocean heat transport variability derives from velocity variability in the Atlantic Water layer and temperature variability in the upper part of the water column. The ocean FW transport variability is dominated by Bering Strait velocity variability. The net water mass transformation in the Arctic entails a freshening and cooling of inflowing waters by 0.62 ± 0.23 in salinity and 3.74° ± 0.76°C in temperature, respectively, and a reduction in density by 0.23 ± 0.20 kg m−3. The boundary heat and FW fluxes provide a benchmark dataset for the validation of numerical models and atmospheric reanalysis products. |
format |
Article in Journal/Newspaper |
author |
Tsubouchi, Takamasa Bacon, Sheldon Aksenov, Yevgeny Naveira Garabato, Alberto C. Beszczynska-Möller, Agnieszka Hansen, Edmond de Steur, Laura Curry, Beth Lee, Craig M. |
spellingShingle |
Tsubouchi, Takamasa Bacon, Sheldon Aksenov, Yevgeny Naveira Garabato, Alberto C. Beszczynska-Möller, Agnieszka Hansen, Edmond de Steur, Laura Curry, Beth Lee, Craig M. The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates |
author_facet |
Tsubouchi, Takamasa Bacon, Sheldon Aksenov, Yevgeny Naveira Garabato, Alberto C. Beszczynska-Möller, Agnieszka Hansen, Edmond de Steur, Laura Curry, Beth Lee, Craig M. |
author_sort |
Tsubouchi, Takamasa |
title |
The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates |
title_short |
The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates |
title_full |
The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates |
title_fullStr |
The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates |
title_full_unstemmed |
The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates |
title_sort |
arctic ocean seasonal cycles of heat and freshwater fluxes: observation-based inverse estimates |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/521492/ https://nora.nerc.ac.uk/id/eprint/521492/1/jpo-d-17-0239.1.pdf https://doi.org/10.1175/JPO-D-17-0239.1 |
geographic |
Arctic Arctic Ocean Barents Sea Bering Strait |
geographic_facet |
Arctic Arctic Ocean Barents Sea Bering Strait |
genre |
Arctic Arctic Arctic Ocean Barents Sea Bering Strait Davis Strait Fram Strait Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Bering Strait Davis Strait Fram Strait Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/521492/1/jpo-d-17-0239.1.pdf Tsubouchi, Takamasa; Bacon, Sheldon orcid:0000-0002-2471-9373 Aksenov, Yevgeny orcid:0000-0001-6132-3434 Naveira Garabato, Alberto C.; Beszczynska-Möller, Agnieszka; Hansen, Edmond; de Steur, Laura; Curry, Beth; Lee, Craig M. 2018 The Arctic Ocean Seasonal Cycles of Heat and Freshwater Fluxes: Observation-Based Inverse Estimates. Journal of Physical Oceanography, 48 (9). 2029-2055. https://doi.org/10.1175/JPO-D-17-0239.1 <https://doi.org/10.1175/JPO-D-17-0239.1> |
op_doi |
https://doi.org/10.1175/JPO-D-17-0239.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
48 |
container_issue |
9 |
container_start_page |
2029 |
op_container_end_page |
2055 |
_version_ |
1766301307874836480 |