On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean
This study presents recent observations to quantify oceanic heat fluxes along the continental slope of the Eurasian part of the Arctic Ocean, in order to understand the dominant processes leading to the observed along‐track heat loss of the Arctic Boundary Current (ABC). We investigate the fate of w...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://doi.org/10.23689/fidgeo-4281 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8627 |
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ftsubggeo:oai:e-docs.geo-leo.de:11858/8627 |
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Open Polar |
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GEO-LEOe-docs (FID GEO) |
op_collection_id |
ftsubggeo |
language |
English |
topic |
ddc:551.46 Arctic Boundary Current Arctic Ocean heat flux Laptev Sea mixing turbulence |
spellingShingle |
ddc:551.46 Arctic Boundary Current Arctic Ocean heat flux Laptev Sea mixing turbulence Schulz, Kirstin Janout, Markus Lenn, Yueng‐Djern Ruiz‐Castillo, Eugenio Polyakov, Igor Mohrholz, Volker Tippenhauer, Sandra Reeve, Krissy Anne Hölemann, Jens Rabe, Benjamin Vredenborg, Myriel Janout, Markus; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Lenn, Yueng‐Djern; 2 School of Ocean Sciences Bangor University Menai Bridge UK Ruiz‐Castillo, Eugenio; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Polyakov, Igor; 3 International Arctic Research Center College of Natural Science and Mathematics University of Alaska Fairbanks Fairbanks USA Mohrholz, Volker; 4 Leibniz Institute for Baltic Sea Research Rostock Germany Tippenhauer, Sandra; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Reeve, Krissy Anne; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Hölemann, Jens; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Rabe, Benjamin; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Vredenborg, Myriel; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean |
topic_facet |
ddc:551.46 Arctic Boundary Current Arctic Ocean heat flux Laptev Sea mixing turbulence |
description |
This study presents recent observations to quantify oceanic heat fluxes along the continental slope of the Eurasian part of the Arctic Ocean, in order to understand the dominant processes leading to the observed along‐track heat loss of the Arctic Boundary Current (ABC). We investigate the fate of warm Atlantic Water (AW) along the Arctic Ocean continental margin of the Siberian Seas based on 11 cross‐slope conductivity, temperature, depth transects and direct heat flux estimates from microstructure profiles obtained in summer 2018. The ABC loses on average O(108) J m−2 per 100 km during its propagation along the Siberian shelves, corresponding to an average heat flux of 47 W m−2 out of the AW layer. The measured vertical heat flux on the upper AW interface of on average 10 W m−2 in the deep basin, and 3.7 W m−2 above the continental slope is larger than previously reported values. Still, these heat fluxes explain less than 20% of the observed heat loss within the boundary current. Heat fluxes are significantly increased in the turbulent near‐bottom layer, where AW intersects the continental slope, and at the lee side of a topographic irregularity. This indicates that mixing with ambient colder water along the continental margins is an important contribution to AW heat loss. Furthermore, the cold halocline layer receives approximately the same amount of heat due to upward mixing from the AW, compared to heat input from the summer‐warmed surface layer above. This underlines the importance of both surface warming and increased vertical mixing in a future ice‐free Arctic Ocean in summer. Plain Language Summary: Warm water from the Atlantic Ocean enters the Arctic Ocean through the Barents Sea and the Fram Strait, between Greenland and Norway, and directly influences the formation of sea ice: When the Atlantic Water (AW) is located close to the ocean's surface, as is the case shortly after its inflow in the Barents Sea, sea ice melts and new sea ice formation is hindered. This is why the Barents Sea is often ice ... |
format |
Article in Journal/Newspaper |
author |
Schulz, Kirstin Janout, Markus Lenn, Yueng‐Djern Ruiz‐Castillo, Eugenio Polyakov, Igor Mohrholz, Volker Tippenhauer, Sandra Reeve, Krissy Anne Hölemann, Jens Rabe, Benjamin Vredenborg, Myriel Janout, Markus; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Lenn, Yueng‐Djern; 2 School of Ocean Sciences Bangor University Menai Bridge UK Ruiz‐Castillo, Eugenio; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Polyakov, Igor; 3 International Arctic Research Center College of Natural Science and Mathematics University of Alaska Fairbanks Fairbanks USA Mohrholz, Volker; 4 Leibniz Institute for Baltic Sea Research Rostock Germany Tippenhauer, Sandra; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Reeve, Krissy Anne; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Hölemann, Jens; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Rabe, Benjamin; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Vredenborg, Myriel; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany |
author_facet |
Schulz, Kirstin Janout, Markus Lenn, Yueng‐Djern Ruiz‐Castillo, Eugenio Polyakov, Igor Mohrholz, Volker Tippenhauer, Sandra Reeve, Krissy Anne Hölemann, Jens Rabe, Benjamin Vredenborg, Myriel Janout, Markus; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Lenn, Yueng‐Djern; 2 School of Ocean Sciences Bangor University Menai Bridge UK Ruiz‐Castillo, Eugenio; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Polyakov, Igor; 3 International Arctic Research Center College of Natural Science and Mathematics University of Alaska Fairbanks Fairbanks USA Mohrholz, Volker; 4 Leibniz Institute for Baltic Sea Research Rostock Germany Tippenhauer, Sandra; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Reeve, Krissy Anne; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Hölemann, Jens; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Rabe, Benjamin; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Vredenborg, Myriel; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany |
author_sort |
Schulz, Kirstin |
title |
On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean |
title_short |
On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean |
title_full |
On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean |
title_fullStr |
On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean |
title_full_unstemmed |
On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean |
title_sort |
on the along‐slope heat loss of the boundary current in the eastern arctic ocean |
publishDate |
2021 |
url |
https://doi.org/10.23689/fidgeo-4281 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8627 |
geographic |
Arctic Arctic Ocean Barents Sea Laptev Sea Greenland Norway |
geographic_facet |
Arctic Arctic Ocean Barents Sea Laptev Sea Greenland Norway |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait Greenland laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait Greenland laptev Laptev Sea Sea ice |
op_relation |
doi:10.23689/fidgeo-4281 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8627 |
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_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.23689/fidgeo-4281 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
2 |
_version_ |
1766312052822900736 |
spelling |
ftsubggeo:oai:e-docs.geo-leo.de:11858/8627 2023-05-15T14:40:09+02:00 On the Along‐Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean Schulz, Kirstin Janout, Markus Lenn, Yueng‐Djern Ruiz‐Castillo, Eugenio Polyakov, Igor Mohrholz, Volker Tippenhauer, Sandra Reeve, Krissy Anne Hölemann, Jens Rabe, Benjamin Vredenborg, Myriel Janout, Markus; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Lenn, Yueng‐Djern; 2 School of Ocean Sciences Bangor University Menai Bridge UK Ruiz‐Castillo, Eugenio; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Polyakov, Igor; 3 International Arctic Research Center College of Natural Science and Mathematics University of Alaska Fairbanks Fairbanks USA Mohrholz, Volker; 4 Leibniz Institute for Baltic Sea Research Rostock Germany Tippenhauer, Sandra; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Reeve, Krissy Anne; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Hölemann, Jens; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Rabe, Benjamin; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany Vredenborg, Myriel; 1 Alfred‐Wegener‐Institut Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany 2021-02-15 https://doi.org/10.23689/fidgeo-4281 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8627 eng eng doi:10.23689/fidgeo-4281 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8627 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. CC-BY ddc:551.46 Arctic Boundary Current Arctic Ocean heat flux Laptev Sea mixing turbulence doc-type:article 2021 ftsubggeo https://doi.org/10.23689/fidgeo-4281 2022-11-09T06:51:38Z This study presents recent observations to quantify oceanic heat fluxes along the continental slope of the Eurasian part of the Arctic Ocean, in order to understand the dominant processes leading to the observed along‐track heat loss of the Arctic Boundary Current (ABC). We investigate the fate of warm Atlantic Water (AW) along the Arctic Ocean continental margin of the Siberian Seas based on 11 cross‐slope conductivity, temperature, depth transects and direct heat flux estimates from microstructure profiles obtained in summer 2018. The ABC loses on average O(108) J m−2 per 100 km during its propagation along the Siberian shelves, corresponding to an average heat flux of 47 W m−2 out of the AW layer. The measured vertical heat flux on the upper AW interface of on average 10 W m−2 in the deep basin, and 3.7 W m−2 above the continental slope is larger than previously reported values. Still, these heat fluxes explain less than 20% of the observed heat loss within the boundary current. Heat fluxes are significantly increased in the turbulent near‐bottom layer, where AW intersects the continental slope, and at the lee side of a topographic irregularity. This indicates that mixing with ambient colder water along the continental margins is an important contribution to AW heat loss. Furthermore, the cold halocline layer receives approximately the same amount of heat due to upward mixing from the AW, compared to heat input from the summer‐warmed surface layer above. This underlines the importance of both surface warming and increased vertical mixing in a future ice‐free Arctic Ocean in summer. Plain Language Summary: Warm water from the Atlantic Ocean enters the Arctic Ocean through the Barents Sea and the Fram Strait, between Greenland and Norway, and directly influences the formation of sea ice: When the Atlantic Water (AW) is located close to the ocean's surface, as is the case shortly after its inflow in the Barents Sea, sea ice melts and new sea ice formation is hindered. This is why the Barents Sea is often ice ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Fram Strait Greenland laptev Laptev Sea Sea ice GEO-LEOe-docs (FID GEO) Arctic Arctic Ocean Barents Sea Laptev Sea Greenland Norway Journal of Geophysical Research: Oceans 126 2 |