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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ftsouthampton:oai:eprints.soton.ac.uk:66100 2023-07-30T03:59:52+02:00 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 https://eprints.soton.ac.uk/66100/ http://www.agu.org/pubs/crossref/2009/2008GL036792.shtml unknown 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. and Kirillov, S. (2009) Vertical mixing at intermediate depths in the Arctic boundary current. Geophysical Research Letters, 36, L05601. (doi:10.1029/2008GL036792 <http://dx.doi.org/10.1029/2008GL036792>). Article PeerReviewed 2009 ftsouthampton https://doi.org/10.1029/2008GL036792 2023-07-09T21:05:08Z 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 ( < 10?6 W m?3), such that double diffusive convection dominates the vertical mixing in the upper-ocean. The diffusive convection heat fluxes F H dc ?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 University of Southampton: e-Prints Soton Arctic Geophysical Research Letters 36 5 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
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 ( < 10?6 W m?3), such that double diffusive convection dominates the vertical mixing in the upper-ocean. The diffusive convection heat fluxes F H dc ?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. |
spellingShingle |
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 |
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 |
publishDate |
2009 |
url |
https://eprints.soton.ac.uk/66100/ http://www.agu.org/pubs/crossref/2009/2008GL036792.shtml |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_relation |
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. and Kirillov, S. (2009) Vertical mixing at intermediate depths in the Arctic boundary current. Geophysical Research Letters, 36, L05601. (doi:10.1029/2008GL036792 <http://dx.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_ |
1772810601827926016 |