Articles | Volume 14, issue 6
https://doi.org/10.5194/os-14-1349-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-14-1349-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Nov 2018
Research article |
| 02 Nov 2018
| 02 Nov 2018
Heat, salt, and volume transports in the eastern Eurasian Basin of the Arctic Ocean from 2 years of mooring observations
Andrey V. Pnyushkov
CORRESPONDING AUTHOR
International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, USA
Igor V. Polyakov
International Arctic Research Center and College of Natural Science and Mathematics, University of Alaska Fairbanks, Fairbanks, AK, USA
Robert Rember
International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, USA
Vladimir V. Ivanov
Arctic and Antarctic Research Institute, St. Petersburg, Russia
Moscow State University, Geography department, Moscow, Russia
Matthew B. Alkire
Applied Physics Laboratory, University of Washington, Seattle, WA, USA
Igor M. Ashik
Arctic and Antarctic Research Institute, St. Petersburg, Russia
Till M. Baumann
International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, USA
Genrikh V. Alekseev
Arctic and Antarctic Research Institute, St. Petersburg, Russia
Arild Sundfjord
Norwegian Polar Institute, Fram Centre, Tromsø, Norway
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Andrey Pnyushkov, Igor V. Polyakov, Laurie Padman, and An T. Nguyen
Ocean Sci., 14, 1329–1347, https://doi.org/10.5194/os-14-1329-2018, https://doi.org/10.5194/os-14-1329-2018, 2018
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A total of 4 years of velocity and hydrography records from moored profilers over the Laptev Sea slope reveal multiple events of eddies passing through the mooring site. These events suggest that the advection of mesoscale eddies is an important component of ocean dynamics in the Eurasian Basin of the Arctic Ocean. Increased vertical shear of current velocities found within eddies produces enhanced diapycnal mixing, suggesting their importance for the redistribution of heat in the Arctic Ocean.
Matthew B. Alkire, Igor Polyakov, Robert Rember, Andrey Pnyushkov, Vladimir Ivanov, and Igor Ashik
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High-resolution measurements of temperature, salinity, and the stable oxygen isotope ratio of seawater were collected along the slopes of the Barents, Kara, and Laptev seas during late summer of 2013 and 2015. Two separate mixing regimes were identified that describe the initial and final stages of halocline water formation. The linear regressions defining the mixing regimes appear to be stable despite the dramatic environmental changes observed over the Arctic Ocean over the past two decades.
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Geosci. Model Dev., 17, 347–379, https://doi.org/10.5194/gmd-17-347-2024, https://doi.org/10.5194/gmd-17-347-2024, 2024
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Increasing resolution improves model skills in simulating the Arctic Ocean, but other factors such as parameterizations and numerics are at least of the same importance for obtaining reliable simulations.
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Ocean Sci., 18, 1389–1418, https://doi.org/10.5194/os-18-1389-2022, https://doi.org/10.5194/os-18-1389-2022, 2022
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In this study, 2-year mooring observations show the evolution of temperature, salinity, and currents in the northern Barents Sea. Inflow of Atlantic Water from the north in autumn and winter was the main driver of the seasonal cycle in the ocean. Winds modulated the inflow on shorter timescales. The upper-ocean state reflected how much sea ice had previously melted in the area. The import of ocean water and sea ice from adjacent regions plays a key role in the complex air–ice–ocean interplay.
Pedro Duarte, Philipp Assmy, Karley Campbell, and Arild Sundfjord
Geosci. Model Dev., 15, 841–857, https://doi.org/10.5194/gmd-15-841-2022, https://doi.org/10.5194/gmd-15-841-2022, 2022
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Sea ice modeling is an important part of Earth system models (ESMs). The results of ESMs are used by the Intergovernmental Panel on Climate Change in their reports. In this study we present an improvement to calculate the exchange of nutrients between the ocean and the sea ice. This nutrient exchange is an essential process to keep the ice-associated ecosystem functioning. We found out that previous calculation methods may underestimate the primary production of the ice-associated ecosystem.
H. Jakob Belter, Thomas Krumpen, Luisa von Albedyll, Tatiana A. Alekseeva, Gerit Birnbaum, Sergei V. Frolov, Stefan Hendricks, Andreas Herber, Igor Polyakov, Ian Raphael, Robert Ricker, Sergei S. Serovetnikov, Melinda Webster, and Christian Haas
The Cryosphere, 15, 2575–2591, https://doi.org/10.5194/tc-15-2575-2021, https://doi.org/10.5194/tc-15-2575-2021, 2021
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Summer sea ice thickness observations based on electromagnetic induction measurements north of Fram Strait show a 20 % reduction in mean and modal ice thickness from 2001–2020. The observed variability is caused by changes in drift speeds and consequential variations in sea ice age and number of freezing-degree days. Increased ocean heat fluxes measured upstream in the source regions of Arctic ice seem to precondition ice thickness, which is potentially still measurable more than a year later.
Andrey Pnyushkov, Igor V. Polyakov, Laurie Padman, and An T. Nguyen
Ocean Sci., 14, 1329–1347, https://doi.org/10.5194/os-14-1329-2018, https://doi.org/10.5194/os-14-1329-2018, 2018
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A total of 4 years of velocity and hydrography records from moored profilers over the Laptev Sea slope reveal multiple events of eddies passing through the mooring site. These events suggest that the advection of mesoscale eddies is an important component of ocean dynamics in the Eurasian Basin of the Arctic Ocean. Increased vertical shear of current velocities found within eddies produces enhanced diapycnal mixing, suggesting their importance for the redistribution of heat in the Arctic Ocean.
Achim Randelhoff and Arild Sundfjord
Ocean Sci., 14, 293–300, https://doi.org/10.5194/os-14-293-2018, https://doi.org/10.5194/os-14-293-2018, 2018
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The future of Arctic marine ecosystems has received increasing attention in recent years as the extent of the sea ice cover is dwindling. Regional differences in the hydrography, bathymetry and atmospheric forcing of nutrient fluxes essential for phytoplankton growth mean that wind-driven mixing, advection and upwelling will influence the polar ecosystem in differing magnitudes in different regions of the Arctic Ocean, with particular effects likely being restricted to very specific areas.
Matthew B. Alkire, Igor Polyakov, Robert Rember, Andrey Pnyushkov, Vladimir Ivanov, and Igor Ashik
Ocean Sci., 13, 983–995, https://doi.org/10.5194/os-13-983-2017, https://doi.org/10.5194/os-13-983-2017, 2017
Short summary
Short summary
High-resolution measurements of temperature, salinity, and the stable oxygen isotope ratio of seawater were collected along the slopes of the Barents, Kara, and Laptev seas during late summer of 2013 and 2015. Two separate mixing regimes were identified that describe the initial and final stages of halocline water formation. The linear regressions defining the mixing regimes appear to be stable despite the dramatic environmental changes observed over the Arctic Ocean over the past two decades.
I. A. Dmitrenko, S. A. Kirillov, N. Serra, N. V. Koldunov, V. V. Ivanov, U. Schauer, I. V. Polyakov, D. Barber, M. Janout, V. S. Lien, M. Makhotin, and Y. Aksenov
Ocean Sci., 10, 719–730, https://doi.org/10.5194/os-10-719-2014, https://doi.org/10.5194/os-10-719-2014, 2014
D. Bauch, S. Torres-Valdes, I. Polyakov, A. Novikhin, I. Dmitrenko, J. McKay, and A. Mix
Ocean Sci., 10, 141–154, https://doi.org/10.5194/os-10-141-2014, https://doi.org/10.5194/os-10-141-2014, 2014
Related subject area
Approach: In situ Observations | Depth range: Deep Ocean | Geographical range: Deep Seas: Arctic Ocean | Phenomena: Current Field
Structure and dynamics of mesoscale eddies over the Laptev Sea continental slope in the Arctic Ocean
Andrey Pnyushkov, Igor V. Polyakov, Laurie Padman, and An T. Nguyen
Ocean Sci., 14, 1329–1347, https://doi.org/10.5194/os-14-1329-2018, https://doi.org/10.5194/os-14-1329-2018, 2018
Short summary
Short summary
A total of 4 years of velocity and hydrography records from moored profilers over the Laptev Sea slope reveal multiple events of eddies passing through the mooring site. These events suggest that the advection of mesoscale eddies is an important component of ocean dynamics in the Eurasian Basin of the Arctic Ocean. Increased vertical shear of current velocities found within eddies produces enhanced diapycnal mixing, suggesting their importance for the redistribution of heat in the Arctic Ocean.
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Short summary
This study describes along-slope volume, heat, and salt transports derived from observations collected between 2013 and 2015 in the eastern Eurasian Basin of the Arctic Ocean using a cross-slope array of six moorings. Inferred transport estimates may have wide implications and should be considered when assessing high-latitude ocean dynamics.
This study describes along-slope volume, heat, and salt transports derived from observations...
