Field measurements of the vertical shears for a drift current |
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| Authors: | V A Dulov V N Kudryavtsev V I Shrira V E Smolov A N Bol’shakov |
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| Institution: | (1) Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol;(2) Keele University, Keele, UK |
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| Abstract: | We describe the procedure of field experiments aimed at measuring the vertical profiles of the vectors of a drift current
with the help of quasi-Lagrangian drifters. We present the data on the vertical shears of the current at depths of 0.5–5 m
obtained under the conditions of neutral stratification in the upper 5-m layer of the sea in the presence of weak and moderate
winds. The correspondence of the obtained data to the concept according to which the subsurface layer of the sea is regarded
as a near-wall turbulent layer with Ekman current located below is analyzed. A conclusion is made that the results of measurements
correspond, on the average, to the classical concepts demonstrating both the region of logarithmic sublayer and its transition
into the Ekman spiral.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 32–44, January–February, 2007. |
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