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Detailed Reference Information |
Souza, A.J., Alvarez, L.G. and Dickey, T.D. (2004). Tidally induced turbulence and suspended sediment. Geophysical Research Letters 31: doi: 10.1029/2004GL021186. issn: 0094-8276. |
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Nearly continuous data collected using novel methods are utilized to advance the understanding of turbulence and suspended particulate matter (SPM) dynamics under strong tidal flow conditions. Key instrumentation includes a single acoustic current profiler that provides nearly continuous, concurrent turbulence and SPM information with respect to depth near the seafloor and within the water column. Observations show a lag of about 1 hour in turbulence production between the bottom and 12 meters above the bottom (mab), and of about 1.5 hours for SPM. Estimates of eddy viscosity show values ranging between 10-3 and 10-2 m2 s-1, with an almost constant mean value of 3.5 ¿ 10-3 m2 s-1 within the bottom 7 meters. The present observations and a previously reported theory show good agreement in both amplitude and phase for SPM and turbulence, when values of eddy viscosity ranging between 3.5 ¿ 10-3 (mean) and 10-2 (maximum) are used. Our data set is valuable for evaluating, developing, and improving turbulence and SPM numerical models. |
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Abstract |
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Keywords
Oceanography, Physical, Turbulence, diffusion, and mixing processes, Oceanography, General, Continental shelf processes, Oceanography, Physical, Sediment transport, Oceanography, Physical, Instruments and techniques, Oceanography, General, Benthic boundary layers |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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