Response of the mid shoreface of the southern mid-Atlantic Bight to a “northeaster” |
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| Authors: | L D Wright J D Boon III M O Green J H List |
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| Institution: | (1) School of Marine Science, College of William and Mary, Virginia Institute of Marine Science, 23062 Gloucester Point, VA |
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| Abstract: | An instrumented, bottom-mounted, tripod deployed off Duck, North Carolina, at a depth of 8 m provided time Series of pressure, benthic currents, suspended Sediment concentrations and bed-level changes prior to and during a typical northeast storm. A Strong jet-like southerly-setting current generated by the northeaster was accompanied by downwelling and Strong bottom agitation by wind waves. A total bed-level change of over 15 cm was recorded. After a phase of bed erosion, the bed accreted rapidly. Side-scan imagery supports the inference that offshore or alongshore migration of quasi-discrete sediment lobes may have produced the observed pulse-like accretion. |
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