Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring
Mixing and heat flux rates collected in the Eurasian Basin north of Svalbard during the N‐ICE2015 drift expedition are presented. The observations cover the deep Nansen Basin, the Svalbard continental slope, and the shallow Yermak Plateau from winter to summer. Mean quiescent winter heat flux values...
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Online Access: | https://doi.org/10.1002/2016JC012441 http://ecite.utas.edu.au/125322 |
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ftunivtasecite:oai:ecite.utas.edu.au:125322 2023-05-15T14:26:07+02:00 Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring Meyer, A Fer, I Sundfjord, A Peterson, AK 2017 application/pdf https://doi.org/10.1002/2016JC012441 http://ecite.utas.edu.au/125322 en eng Wiley-Blackwell Publishing Inc. http://ecite.utas.edu.au/125322/1/125322.pdf http://dx.doi.org/10.1002/2016JC012441 Meyer, A and Fer, I and Sundfjord, A and Peterson, AK, Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring, Journal of Geophysical Research: Oceans, 122, (6) pp. 4569-4586. ISSN 2169-9275 (2017) [Refereed Article] http://ecite.utas.edu.au/125322 Earth Sciences Oceanography Physical Oceanography Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1002/2016JC012441 2019-12-13T22:23:53Z Mixing and heat flux rates collected in the Eurasian Basin north of Svalbard during the N‐ICE2015 drift expedition are presented. The observations cover the deep Nansen Basin, the Svalbard continental slope, and the shallow Yermak Plateau from winter to summer. Mean quiescent winter heat flux values in the Nansen Basin are 2 W m −2 at the ice‐ocean interface, 3 W m −2 in the pycnocline, and 1 W m −2 below the pycnocline. Large heat fluxes exceeding 300 W m −2 are observed in the late spring close to the surface over the Yermak Plateau. The data consisting of 588 microstructure profiles and 50 days of high‐resolution under‐ice turbulence measurements are used to quantify the impact of several forcing factors on turbulent dissipation and heat flux rates. Wind forcing increases turbulent dissipation seven times in the upper 50 m, and doubles heat fluxes at the ice‐ocean interface. The presence of warm Atlantic Water close to the surface increases the temperature gradient in the water column, leading to enhanced heat flux rates within the pycnocline. Steep topography consistently enhances dissipation rates by a factor of four and episodically increases heat flux at depth. It is, however, the combination of storms and shallow Atlantic Water that leads to the highest heat flux rates observed: i ce‐ocean interface heat fluxes average 100 W m −2 during peak events and are associated with rapid basal sea ice melt, reaching 25 cm/d. Article in Journal/Newspaper Arctic Arctic Nansen Basin Sea ice Svalbard Yermak plateau eCite UTAS (University of Tasmania) Arctic Svalbard Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Journal of Geophysical Research: Oceans 122 6 4569 4586 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical Oceanography |
spellingShingle |
Earth Sciences Oceanography Physical Oceanography Meyer, A Fer, I Sundfjord, A Peterson, AK Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring |
topic_facet |
Earth Sciences Oceanography Physical Oceanography |
description |
Mixing and heat flux rates collected in the Eurasian Basin north of Svalbard during the N‐ICE2015 drift expedition are presented. The observations cover the deep Nansen Basin, the Svalbard continental slope, and the shallow Yermak Plateau from winter to summer. Mean quiescent winter heat flux values in the Nansen Basin are 2 W m −2 at the ice‐ocean interface, 3 W m −2 in the pycnocline, and 1 W m −2 below the pycnocline. Large heat fluxes exceeding 300 W m −2 are observed in the late spring close to the surface over the Yermak Plateau. The data consisting of 588 microstructure profiles and 50 days of high‐resolution under‐ice turbulence measurements are used to quantify the impact of several forcing factors on turbulent dissipation and heat flux rates. Wind forcing increases turbulent dissipation seven times in the upper 50 m, and doubles heat fluxes at the ice‐ocean interface. The presence of warm Atlantic Water close to the surface increases the temperature gradient in the water column, leading to enhanced heat flux rates within the pycnocline. Steep topography consistently enhances dissipation rates by a factor of four and episodically increases heat flux at depth. It is, however, the combination of storms and shallow Atlantic Water that leads to the highest heat flux rates observed: i ce‐ocean interface heat fluxes average 100 W m −2 during peak events and are associated with rapid basal sea ice melt, reaching 25 cm/d. |
format |
Article in Journal/Newspaper |
author |
Meyer, A Fer, I Sundfjord, A Peterson, AK |
author_facet |
Meyer, A Fer, I Sundfjord, A Peterson, AK |
author_sort |
Meyer, A |
title |
Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring |
title_short |
Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring |
title_full |
Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring |
title_fullStr |
Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring |
title_full_unstemmed |
Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring |
title_sort |
mixing rates and vertical heat fluxes north of svalbard from arctic winter to spring |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2017 |
url |
https://doi.org/10.1002/2016JC012441 http://ecite.utas.edu.au/125322 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Svalbard Yermak Plateau |
geographic_facet |
Arctic Svalbard Yermak Plateau |
genre |
Arctic Arctic Nansen Basin Sea ice Svalbard Yermak plateau |
genre_facet |
Arctic Arctic Nansen Basin Sea ice Svalbard Yermak plateau |
op_relation |
http://ecite.utas.edu.au/125322/1/125322.pdf http://dx.doi.org/10.1002/2016JC012441 Meyer, A and Fer, I and Sundfjord, A and Peterson, AK, Mixing rates and vertical heat fluxes north of Svalbard from Arctic winter to spring, Journal of Geophysical Research: Oceans, 122, (6) pp. 4569-4586. ISSN 2169-9275 (2017) [Refereed Article] http://ecite.utas.edu.au/125322 |
op_doi |
https://doi.org/10.1002/2016JC012441 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
6 |
container_start_page |
4569 |
op_container_end_page |
4586 |
_version_ |
1766298599914733568 |