Direct estimates of the lateral eddy diffusivity in the gulf of finland of the Baltic Sea (based on the results of numerical experiments with an eddy resolving model) |
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| Authors: | V M Zhurbas J Laanemets N P Kuzmina S S Muraviev J Elken |
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| Institution: | (1) Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia;(2) Institute of Marine Systems, Tallinn University of Technology, Tallinn, Estonia |
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| Abstract: | Numerical modeling was applied to study the generation of transversal jet filaments observed in the summer of 1999 after an upwelling event off the northern coast of the Gulf of Finland. An eddy resolving model well reproduces the mesoscale coherent structures observed. It was shown that they represent manifestations of instability of alongshore baroclinic jet currents of an upwelling-downwelling origin. An estimate of the effective lateral eddy diffusivity in the mesoscale coherent structures equal to 500 m2/s was obtained as a result of statistical processing of pseudorandom model fields of the temperature and current velocity. |
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