Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations
<p>This study discusses along-slope volume, heat, and salt transports derived from observations collected in 2013–2015 using a cross-slope array of six moorings ranging from 250 to 3900 m in the eastern Eurasian Basin (EB) of the Arctic Ocean. These observations demonstrate that...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-11-01
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| Series: | Ocean Science |
| Online Access: | https://www.ocean-sci.net/14/1349/2018/os-14-1349-2018.pdf |
| _version_ | 1828365031251640320 |
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| author | A. V. Pnyushkov I. V. Polyakov R. Rember V. V. Ivanov V. V. Ivanov M. B. Alkire I. M. Ashik T. M. Baumann G. V. Alekseev A. Sundfjord |
| author_facet | A. V. Pnyushkov I. V. Polyakov R. Rember V. V. Ivanov V. V. Ivanov M. B. Alkire I. M. Ashik T. M. Baumann G. V. Alekseev A. Sundfjord |
| author_sort | A. V. Pnyushkov |
| collection | DOAJ |
| description | <p>This study discusses along-slope volume, heat, and salt transports derived
from observations collected in 2013–2015 using a cross-slope array of six
moorings ranging from 250 to 3900 m in the eastern Eurasian Basin (EB) of
the Arctic Ocean. These observations demonstrate that in the upper 780 m
layer, the along-slope boundary current advected, on average, 5.1±0.1 Sv
of water, predominantly in the eastward (shallow-to-right) direction.
Monthly net volume transports across the Laptev Sea slope vary widely, from
∼ 0.3±0.8 in April 2014 to ∼ 9.9±0.8 Sv in June 2014;
3.1±0.1 Sv (or 60 %) of the net transport
was associated with warm and salty intermediate-depth Atlantic Water (AW).
Calculated heat transport for 2013–2015 (relative to −1.8 °C) was
46.0±1.7 TW, and net salt transport (relative to zero salinity) was
172±6 Mkg s<sup>−1</sup>. Estimates for AW heat and salt transports were
32.7±1.3 TW (71 % of net heat transport) and 112±4 Mkg s<sup>−1</sup>
(65 % of net salt transport). The variability of currents explains
∼ 90 % of the variability in the heat and salt transports.
The remaining ∼ 10 % is controlled by temperature and
salinity anomalies together with the temporal variability of the AW layer
thickness. The annual mean volume transports decreased by 25 % from
5.8±0.2 Sv in 2013–2014 to 4.4±0.2 Sv in 2014–2015, suggesting
that changes in the transports at interannual and longer timescales in the
eastern EB may be significant.</p> |
| first_indexed | 2024-04-14T05:24:17Z |
| format | Article |
| id | doaj.art-5a58841f73574aeab811fcaee824ff9c |
| institution | Directory Open Access Journal |
| issn | 1812-0784 1812-0792 |
| language | English |
| last_indexed | 2024-04-14T05:24:17Z |
| publishDate | 2018-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Ocean Science |
| spelling | doaj.art-5a58841f73574aeab811fcaee824ff9c2022-12-22T02:10:01ZengCopernicus PublicationsOcean Science1812-07841812-07922018-11-01141349137110.5194/os-14-1349-2018Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observationsA. V. Pnyushkov0I. V. Polyakov1R. Rember2V. V. Ivanov3V. V. Ivanov4M. B. Alkire5I. M. Ashik6T. M. Baumann7G. V. Alekseev8A. Sundfjord9International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, USAInternational Arctic Research Center and College of Natural Science and Mathematics, University of Alaska Fairbanks, Fairbanks, AK, USAInternational Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, USAArctic and Antarctic Research Institute, St. Petersburg, RussiaMoscow State University, Geography department, Moscow, RussiaApplied Physics Laboratory, University of Washington, Seattle, WA, USAArctic and Antarctic Research Institute, St. Petersburg, RussiaInternational Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, USAArctic and Antarctic Research Institute, St. Petersburg, RussiaNorwegian Polar Institute, Fram Centre, Tromsø, Norway<p>This study discusses along-slope volume, heat, and salt transports derived from observations collected in 2013–2015 using a cross-slope array of six moorings ranging from 250 to 3900 m in the eastern Eurasian Basin (EB) of the Arctic Ocean. These observations demonstrate that in the upper 780 m layer, the along-slope boundary current advected, on average, 5.1±0.1 Sv of water, predominantly in the eastward (shallow-to-right) direction. Monthly net volume transports across the Laptev Sea slope vary widely, from ∼ 0.3±0.8 in April 2014 to ∼ 9.9±0.8 Sv in June 2014; 3.1±0.1 Sv (or 60 %) of the net transport was associated with warm and salty intermediate-depth Atlantic Water (AW). Calculated heat transport for 2013–2015 (relative to −1.8 °C) was 46.0±1.7 TW, and net salt transport (relative to zero salinity) was 172±6 Mkg s<sup>−1</sup>. Estimates for AW heat and salt transports were 32.7±1.3 TW (71 % of net heat transport) and 112±4 Mkg s<sup>−1</sup> (65 % of net salt transport). The variability of currents explains ∼ 90 % of the variability in the heat and salt transports. The remaining ∼ 10 % is controlled by temperature and salinity anomalies together with the temporal variability of the AW layer thickness. The annual mean volume transports decreased by 25 % from 5.8±0.2 Sv in 2013–2014 to 4.4±0.2 Sv in 2014–2015, suggesting that changes in the transports at interannual and longer timescales in the eastern EB may be significant.</p>https://www.ocean-sci.net/14/1349/2018/os-14-1349-2018.pdf |
| spellingShingle | A. V. Pnyushkov I. V. Polyakov R. Rember V. V. Ivanov V. V. Ivanov M. B. Alkire I. M. Ashik T. M. Baumann G. V. Alekseev A. Sundfjord Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations Ocean Science |
| title | Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations |
| title_full | Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations |
| title_fullStr | Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations |
| title_full_unstemmed | Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations |
| title_short | Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations |
| title_sort | heat salt and volume transports in the eastern eurasian basin of the arctic ocean from 2 years of mooring observations |
| url | https://www.ocean-sci.net/14/1349/2018/os-14-1349-2018.pdf |
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