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Gravitational circulation in a tidal strait

By:
, , , and
Edited by:
Shane Richard M.

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Abstract

Eight months of continuous measurements of tidal current profiles with an acoustic Doppler current profiler (ADCP) were made in Carquinez Strait, California, during 1988 for the purpose of estimating long-term variations in vertical profiles of Eulerian residual currents. Salinity stratification near the ADCP deployment site also was analyzed. The strength of density-driven gravitational circulation and the amount of salinity stratification in the strait varied significantly over the spring-neap tidal cycle. Density currents and stratification were greater during neap tides when vertical mixing from the tide is at a minimum. Landward residual currents along the bottom were observed only during neap tides. Simulations made with a three-dimensional model to supplement the field measurements show a significant, tidally induced lateral variation in residual currents across the strait. The Stokes drift of 1-2 cm/s in the strait is small relative to the speed of gravitational currents.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Gravitational circulation in a tidal strait
ISBN:
0872628167
Year Published:
1991
Language:
English
Publisher:
Publ by ASCE
Publisher location:
New York, NY, United States
Larger Work Title:
Proceedings - National Conference on Hydraulic Engineering
First page:
429
Last page:
434
Number of Pages:
6
Conference Title:
Proceedings of the 1991 National Conference on Hydraulic Engineering
Conference Location:
Nashville, TN, USA
Conference Date:
29 July 1991 through 2 August 1991