Vertical mixing at intermediate depths in the Arctic boundary current
Microstructure and hydrographic observations, during September 2007 in the boundary current on the East Siberian continental slope, document upper ocean stratification and along-stream water mass changes. A thin warm surface layer overrides a shallow halocline characterized by a ~40-m thick temperat...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2009
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Online Access: | http://nora.nerc.ac.uk/id/eprint/5919/ https://nora.nerc.ac.uk/id/eprint/5919/5/2008GL036792.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008GL036792 https://doi.org/10.1029/2008GL036792 |
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ftnerc:oai:nora.nerc.ac.uk:5919 2024-06-09T07:42:33+00:00 Vertical mixing at intermediate depths in the Arctic boundary current Lenn, Y.D. Wiles, P.J. Torres-Valdes, S. Abrahamsen, E.P. Rippeth, T.P. Simpson, J.H. Bacon, S. Laxon, S.W. Polyakov, I. Ivanov, V. Kirillov, S. 2009-03-03 text http://nora.nerc.ac.uk/id/eprint/5919/ https://nora.nerc.ac.uk/id/eprint/5919/5/2008GL036792.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008GL036792 https://doi.org/10.1029/2008GL036792 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/5919/5/2008GL036792.pdf Lenn, Y.D.; Wiles, P.J.; Torres-Valdes, S.; Abrahamsen, E.P. orcid:0000-0001-5924-5350 Rippeth, T.P.; Simpson, J.H.; Bacon, S. orcid:0000-0002-2471-9373 Laxon, S.W.; Polyakov, I.; Ivanov, V.; Kirillov, S. 2009 Vertical mixing at intermediate depths in the Arctic boundary current. Geophysical Research Letters, 36 (5), L05601. 5, pp. https://doi.org/10.1029/2008GL036792 <https://doi.org/10.1029/2008GL036792> Marine Sciences Publication - Article PeerReviewed 2009 ftnerc https://doi.org/10.1029/2008GL036792 2024-05-15T08:52:26Z Microstructure and hydrographic observations, during September 2007 in the boundary current on the East Siberian continental slope, document upper ocean stratification and along-stream water mass changes. A thin warm surface layer overrides a shallow halocline characterized by a ~40-m thick temperature minimum layer beginning at ~30 m depth. Below the halocline, well-defined thermohaline diffusive staircases extended downwards to warm Atlantic Water intrusions found at 200-800 m depth. Observed turbulent eddy kinetic energy dissipations are extremely low (epsilon <10^-6 W m^-3), such that double diffusive convection dominates the vertical mixing in the upper-ocean. The diffusive convection heat fluxes F^dc_H ~1 W m^-2, are an order of magnitude too small to account for the observed along-stream cooling of the boundary current. Our results implicate circulation patterns and the influence of shelf waters in the evolution of the boundary current waters. Article in Journal/Newspaper Arctic Arctic Natural Environment Research Council: NERC Open Research Archive Arctic Geophysical Research Letters 36 5 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Lenn, Y.D. Wiles, P.J. Torres-Valdes, S. Abrahamsen, E.P. Rippeth, T.P. Simpson, J.H. Bacon, S. Laxon, S.W. Polyakov, I. Ivanov, V. Kirillov, S. Vertical mixing at intermediate depths in the Arctic boundary current |
topic_facet |
Marine Sciences |
description |
Microstructure and hydrographic observations, during September 2007 in the boundary current on the East Siberian continental slope, document upper ocean stratification and along-stream water mass changes. A thin warm surface layer overrides a shallow halocline characterized by a ~40-m thick temperature minimum layer beginning at ~30 m depth. Below the halocline, well-defined thermohaline diffusive staircases extended downwards to warm Atlantic Water intrusions found at 200-800 m depth. Observed turbulent eddy kinetic energy dissipations are extremely low (epsilon <10^-6 W m^-3), such that double diffusive convection dominates the vertical mixing in the upper-ocean. The diffusive convection heat fluxes F^dc_H ~1 W m^-2, are an order of magnitude too small to account for the observed along-stream cooling of the boundary current. Our results implicate circulation patterns and the influence of shelf waters in the evolution of the boundary current waters. |
format |
Article in Journal/Newspaper |
author |
Lenn, Y.D. Wiles, P.J. Torres-Valdes, S. Abrahamsen, E.P. Rippeth, T.P. Simpson, J.H. Bacon, S. Laxon, S.W. Polyakov, I. Ivanov, V. Kirillov, S. |
author_facet |
Lenn, Y.D. Wiles, P.J. Torres-Valdes, S. Abrahamsen, E.P. Rippeth, T.P. Simpson, J.H. Bacon, S. Laxon, S.W. Polyakov, I. Ivanov, V. Kirillov, S. |
author_sort |
Lenn, Y.D. |
title |
Vertical mixing at intermediate depths in the Arctic boundary current |
title_short |
Vertical mixing at intermediate depths in the Arctic boundary current |
title_full |
Vertical mixing at intermediate depths in the Arctic boundary current |
title_fullStr |
Vertical mixing at intermediate depths in the Arctic boundary current |
title_full_unstemmed |
Vertical mixing at intermediate depths in the Arctic boundary current |
title_sort |
vertical mixing at intermediate depths in the arctic boundary current |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
http://nora.nerc.ac.uk/id/eprint/5919/ https://nora.nerc.ac.uk/id/eprint/5919/5/2008GL036792.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008GL036792 https://doi.org/10.1029/2008GL036792 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/5919/5/2008GL036792.pdf Lenn, Y.D.; Wiles, P.J.; Torres-Valdes, S.; Abrahamsen, E.P. orcid:0000-0001-5924-5350 Rippeth, T.P.; Simpson, J.H.; Bacon, S. orcid:0000-0002-2471-9373 Laxon, S.W.; Polyakov, I.; Ivanov, V.; Kirillov, S. 2009 Vertical mixing at intermediate depths in the Arctic boundary current. Geophysical Research Letters, 36 (5), L05601. 5, pp. https://doi.org/10.1029/2008GL036792 <https://doi.org/10.1029/2008GL036792> |
op_doi |
https://doi.org/10.1029/2008GL036792 |
container_title |
Geophysical Research Letters |
container_volume |
36 |
container_issue |
5 |
_version_ |
1801371352621383680 |