Vertical mixing at intermediate depths in the Arctic boundary current

Lenn, Y.D.; Wiles, P.J.; Torres-Valdes, S.; Abrahamsen, E.P. ORCID:; Rippeth, T.P.; Simpson, J.H.; Bacon, S. ORCID:; 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.

Before downloading, please read NORA policies.
Copyright 2009 by the American Geophysical Union.
2008GL036792.pdf - Published Version

Download (1MB) | Preview


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.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: BAS Programmes > Other Special Projects
ISSN: 0094-8276
Additional Keywords: Arctic boundary current, turbulence, double diffusion
NORA Subject Terms: Marine Sciences
Date made live: 06 Mar 2009 15:15 +0 (UTC)

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...