The pattern of cross-slope depositional fluxes

Amin, M.; Huthnance, J.M. ORCID: 1999 The pattern of cross-slope depositional fluxes. Deep Sea Research Part I: Oceanographic Research Papers, 46 (9). 1565-1591.

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A simple model with horizontal and vertical diffusivities and settling velocity is used to calculate expected distributions of suspended particulate matter in a section across the continental shelf and slope. Dependencies on the shelf and slope profile, diffusivities, settling velocity, cross-slope advection and boundary sources/sinks are explored. It is found that the strongest factors are relative values of diffusivities and settling velocity, and the distribution of sources and sinks – including bottom deposition or resuspension. The latter is the principal means whereby an increased concentration near the bottom is likely, and is suggested as the usual reason for increased deposition recorded by sediment traps nearer the bottom. Observed thin, near-horizontal intermediate nepheloid layers put bounds on the vertical diffusivity and settling velocity, e.g. O(10-4 m2 s-1, 10-5 m s-1) over Goban Spur in OMEX.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: POL Programmes
ISSN: 09670637
Date made live: 01 Jul 2013 14:06 +0 (UTC)

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