A new instrument system to investigate sediment dynamics on continental shelves

Marine Geology
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A new instrumented tripod, the GEOPROBE system, has been constructed and used to collect time-series data on physical and geological parameters that are important in bottom sediment dynamics on continental shelves. Simultaneous in situ digital recording of pressure, temperature, light scattering, and light transmission, in combination with current velocity profiles measured with a near-bottom vertical array of electromagnetic current meters, is used to correlate bottom shear generated by a variety of oceanic processes (waves, tides, mean flow, etc.) with incipient movement and resuspension of bottom sediment. A bottom camera system that is activated when current speeds exceed preset threshold values provides a unique method to identify initial sediment motion and bed form development. Data from a twenty day deployment of the GEOPROBE system in Norton Sound, Alaska, during the period September 24 - October 14, 1976 show that threshold conditions for sediment movement are commonly exceeded, even in calm weather periods, due to the additive effects of tidal currents, mean circulation, and surface waves. ?? 1979.
Publication type Article
Publication Subtype Journal Article
Title A new instrument system to investigate sediment dynamics on continental shelves
Series title Marine Geology
Volume 30
Issue 3-4
Year Published 1979
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Marine Geology
First page 299
Last page 312
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