Boundary-interior exchange: Reviewing the idea that internal-wave mixing enhances lateral dispersal near continental margins

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McPhee-Shaw, E. (2006). Boundary-interior exchange: Reviewing the idea that internal-wave mixing enhances lateral dispersal near continental margins. Deep-Sea Research Part II: Topical Studies in Oceanography, 53(1), 42-59. doi:10.1016/j.dsr2.2005.10.018
Metadata
TitleBoundary-interior exchange: Reviewing the idea that internal-wave mixing enhances lateral dispersal near continental margins
AuthorsE. McPhee-Shaw
AbstractNear-boundary mixing affects the dispersal of seawater constituents and may have important consequences for ecological and geological processes since continental boundaries are a fundamental source of lithogenic sediments, nutrients, iron and carbon. This paper examines the idea that gravitational collapse after near-boundary vertical mixing events leads to enhanced dispersal in the horizontal (along-isopycnal) direction. Dye studies from the continental shelf and laboratory investigations of intrusions generated by internal-wave breaking suggest that this is a viable mechanism for offshore dispersal of boundary-layer fluid. However, there have been few attempts to examine this process in the ocean or to quantify it in a form amenable to parameterization. Here this process is considered primarily for continental slopes and conditions of relatively uniform stratification, rather than for shelves where the boundary can intersect a front or seasonal thermocline. This paper reviews a selection of studies examining this concept in the laboratory and ocean, and reviews studies linking internal-wave reflection and mixing to the offshore dispersal of suspended sediment from continental margins. © 2006 Elsevier Ltd. All rights reserved.
JournalDeep-Sea Research Part II: Topical Studies in Oceanography
Date2006
Volume53
Issue1-2
Start page42
End page59
ISSN0967-0645
SubjectsBoundary layer flow, Dyes, Sediment transport, Turbulence, Continental margins, Intermediate nepheloid layers, Internal wave breaking, Seawater, boundary layer, dispersal
NoteCited By (since 1996):27, Oceanography, CODEN: DSROE

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