Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya
We assessed the spatial and temporal variability of the Arctic Boundary Current (ABC) using seven oceanographic moorings, deployed across the continental slope north of Severnaya Zemlya in 2015–2018. Transports and individual water masses were quantified based on temperature and salinity recorders a...
Published in: | Journal of Geophysical Research: Oceans |
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2023
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ftsubggeo:oai:e-docs.geo-leo.de:11858/11134 2023-12-17T10:24:45+01:00 Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya Ruiz‐Castillo, Eugenio Janout, Markus Hölemann, Jens Kanzow, Torsten Schulz, Kirstin Ivanov, Vladimir 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany 3 University of Texas Oden Institute for Computational Engineering and Sciences Austin TX USA 4 Lomonosov Moscow State University Geography Faculty Oceanology Department Moscow Russia 2023-01-21 https://doi.org/10.1029/2022JC018677 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11134 eng eng doi:10.1029/2022JC018677 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11134 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. ddc:551.48 Arctic Boundary Current seasonal transport variability water mass transport along‐slope current doc-type:article 2023 ftsubggeo https://doi.org/10.1029/2022JC018677 2023-11-19T23:12:31Z We assessed the spatial and temporal variability of the Arctic Boundary Current (ABC) using seven oceanographic moorings, deployed across the continental slope north of Severnaya Zemlya in 2015–2018. Transports and individual water masses were quantified based on temperature and salinity recorders and current profilers. Our results were compared with observations from the northeast Svalbard and the central Laptev Sea continental slopes to evaluate the hydrographic transformation along the ABC pathway. The highest velocities (>0.30 m s −1 ) of the ABC occurred at the upper continental slope and decreased offshore to below 0.03 m s −1 in the deep basin. The ABC showed seasonal variability with velocities two times higher in winter than in summer. Compared to upstream conditions in Svalbard, water mass distribution changed significantly within 20 km of the shelf edge due to mixing with‐ and intrusion of shelf waters. The ABC transported 4.15 ± 0.3 Sv in the depth range 50–1,000 m, where 0.88 ± 0.1, 1.5 ± 0.2, 0.61 ± 0.1 and 1.0 ± 0.15 Sv corresponded to Atlantic Water (AW), Dense Atlantic Water (DAW), Barents Sea Branch Water (BSBW) and Transformed Atlantic Water (TAW). 62–70% of transport was constrained to within 30–40 km of the shelf edge, and beyond 84 km, transport increases were estimated to be 0.54 Sv. Seasonality of TAW derived from local shelf‐processes and advection of seasonal‐variable Fram Strait waters, while BSBW transport variability was dominated by temperature changes with maximum transport coinciding with minimum temperatures. Further Barents Sea warming will likely reduce TAW and BSBW transport leading to warmer conditions along the ABC pathway. Plain Language Summary: We assessed the structure and seasonal variability of the flow and water masses of the Arctic Boundary Current (ABC) in the region north of Severnaya Zemlya. This current is important in the Arctic Ocean as it transports relatively warm and saline waters along the Eurasian Arctic continental slope. We quantified the flow, ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Fram Strait laptev Laptev Sea Severnaya Zemlya Svalbard GEO-LEOe-docs (FID GEO) Arctic Arctic Ocean Barents Sea Laptev Sea Severnaya Zemlya ENVELOPE(98.000,98.000,79.500,79.500) Svalbard Journal of Geophysical Research: Oceans 128 1 |
institution |
Open Polar |
collection |
GEO-LEOe-docs (FID GEO) |
op_collection_id |
ftsubggeo |
language |
English |
topic |
ddc:551.48 Arctic Boundary Current seasonal transport variability water mass transport along‐slope current |
spellingShingle |
ddc:551.48 Arctic Boundary Current seasonal transport variability water mass transport along‐slope current Ruiz‐Castillo, Eugenio Janout, Markus Hölemann, Jens Kanzow, Torsten Schulz, Kirstin Ivanov, Vladimir 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany 3 University of Texas Oden Institute for Computational Engineering and Sciences Austin TX USA 4 Lomonosov Moscow State University Geography Faculty Oceanology Department Moscow Russia Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya |
topic_facet |
ddc:551.48 Arctic Boundary Current seasonal transport variability water mass transport along‐slope current |
description |
We assessed the spatial and temporal variability of the Arctic Boundary Current (ABC) using seven oceanographic moorings, deployed across the continental slope north of Severnaya Zemlya in 2015–2018. Transports and individual water masses were quantified based on temperature and salinity recorders and current profilers. Our results were compared with observations from the northeast Svalbard and the central Laptev Sea continental slopes to evaluate the hydrographic transformation along the ABC pathway. The highest velocities (>0.30 m s −1 ) of the ABC occurred at the upper continental slope and decreased offshore to below 0.03 m s −1 in the deep basin. The ABC showed seasonal variability with velocities two times higher in winter than in summer. Compared to upstream conditions in Svalbard, water mass distribution changed significantly within 20 km of the shelf edge due to mixing with‐ and intrusion of shelf waters. The ABC transported 4.15 ± 0.3 Sv in the depth range 50–1,000 m, where 0.88 ± 0.1, 1.5 ± 0.2, 0.61 ± 0.1 and 1.0 ± 0.15 Sv corresponded to Atlantic Water (AW), Dense Atlantic Water (DAW), Barents Sea Branch Water (BSBW) and Transformed Atlantic Water (TAW). 62–70% of transport was constrained to within 30–40 km of the shelf edge, and beyond 84 km, transport increases were estimated to be 0.54 Sv. Seasonality of TAW derived from local shelf‐processes and advection of seasonal‐variable Fram Strait waters, while BSBW transport variability was dominated by temperature changes with maximum transport coinciding with minimum temperatures. Further Barents Sea warming will likely reduce TAW and BSBW transport leading to warmer conditions along the ABC pathway. Plain Language Summary: We assessed the structure and seasonal variability of the flow and water masses of the Arctic Boundary Current (ABC) in the region north of Severnaya Zemlya. This current is important in the Arctic Ocean as it transports relatively warm and saline waters along the Eurasian Arctic continental slope. We quantified the flow, ... |
format |
Article in Journal/Newspaper |
author |
Ruiz‐Castillo, Eugenio Janout, Markus Hölemann, Jens Kanzow, Torsten Schulz, Kirstin Ivanov, Vladimir 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany 3 University of Texas Oden Institute for Computational Engineering and Sciences Austin TX USA 4 Lomonosov Moscow State University Geography Faculty Oceanology Department Moscow Russia |
author_facet |
Ruiz‐Castillo, Eugenio Janout, Markus Hölemann, Jens Kanzow, Torsten Schulz, Kirstin Ivanov, Vladimir 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany 3 University of Texas Oden Institute for Computational Engineering and Sciences Austin TX USA 4 Lomonosov Moscow State University Geography Faculty Oceanology Department Moscow Russia |
author_sort |
Ruiz‐Castillo, Eugenio |
title |
Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya |
title_short |
Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya |
title_full |
Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya |
title_fullStr |
Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya |
title_full_unstemmed |
Structure and Seasonal Variability of the Arctic Boundary Current North of Severnaya Zemlya |
title_sort |
structure and seasonal variability of the arctic boundary current north of severnaya zemlya |
publishDate |
2023 |
url |
https://doi.org/10.1029/2022JC018677 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11134 |
long_lat |
ENVELOPE(98.000,98.000,79.500,79.500) |
geographic |
Arctic Arctic Ocean Barents Sea Laptev Sea Severnaya Zemlya Svalbard |
geographic_facet |
Arctic Arctic Ocean Barents Sea Laptev Sea Severnaya Zemlya Svalbard |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait laptev Laptev Sea Severnaya Zemlya Svalbard |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait laptev Laptev Sea Severnaya Zemlya Svalbard |
op_relation |
doi:10.1029/2022JC018677 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11134 |
op_rights |
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_doi |
https://doi.org/10.1029/2022JC018677 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
128 |
container_issue |
1 |
_version_ |
1785569737661480960 |