Lenn, YD and Wiles, PJ and Torres-Valdes, S and Abrahamsen, EP and Rippeth, TP and Simpson, JH and Bacon, S and Laxon, SW and Polyakov, I and Ivanov, V and Kirillov, S (2009) Vertical mixing at intermediate depths in the Arctic boundary current. Geophysical Research Letters , 36 , Article L05601. 10.1029/2008GL036792.
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Abstract
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 similar to 40-m thick temperature minimum layer beginning at similar to 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-H(dc) similar to 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. Citation: Lenn, Y. D., et al. (2009), Vertical mixing at intermediate depths in the Arctic boundary current, Geophys. Res. Lett., 36, L05601, doi:10.1029/2008GL036792.
| Type: | Article |
|---|---|
| Title: | Vertical mixing at intermediate depths in the Arctic boundary current |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2008GL036792 |
| Publisher version: | http://dx.doi.org/10.1029/2008GL036792 |
| Language: | English |
| Additional information: | Copyright 2009 by the American Geophysical Union |
| Keywords: | OCEAN, TURBULENCE, BASIN, FLOW, SEAS |
| UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences |
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