Experimental estimation of the coefficient of vertical turbulent exchange in a stratified layer of the black sea near the continental slope

On the basis of the data of field measurements, we present the results of numerical analysis of the intensity of vertical turbulent exchange in stratified layers of the Black Sea in the region of the shelf–continental-slope boundary depending on the local stratification. The experiments were carried...

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Bibliographic Details
Published in:Physical oceanography 2008-11, Vol.18 (6), p.308-318
Main Authors: Samodurov, A. S., Chukharev, A. M.
Format: Article
Language:English
Subjects:
Analysis of Observations and Methods for Calculating Hydrophysical Fields in the Ocean
Atmospheric Sciences
Brackish
Climate Change
Earth and Environmental Science
Earth Sciences
Environmental Physics
Oceanography
Physical oceanography
Remote Sensing/Photogrammetry
Turbulence
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Summary:On the basis of the data of field measurements, we present the results of numerical analysis of the intensity of vertical turbulent exchange in stratified layers of the Black Sea in the region of the shelf–continental-slope boundary depending on the local stratification. The experiments were carried out within the framework of the GEF/BSERP and Black Sea-2004 international projects . The data were obtained by using a probing version of the Sigma-1 measuring complex. In processing the data of measurements, we apply a procedure of evaluation of the coefficient of vertical turbulent diffusion depending on the external conditions based on the analysis of the spectra of the gradient of temperature fluctuations. For the two studied regions of the shelf, the coefficients of turbulent exchange turn out to be much higher (by about an order of magnitude) than for the open sea under similar conditions. This can be explained by the specific features of the bottom topography affecting the dynamics of quasiinertial waves playing to role of the main causes of small-scale mixing and vertical diffusion.
ISSN:0928-5105
1573-160X
0928-5105
DOI:10.1007/s11110-009-9032-z