Determination of Mesoscale Surface Currents in Shallow-Water Regions According to the Data of High-Frequency Radar Measurements |
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| Authors: | L M Ivanov O V Mel'nichenko |
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| Institution: | (1) Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol, Ukraine |
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| Abstract: | We propose a new method for the evaluation of the velocities of surface currents according to the data of measurements carried
out by using high-frequency land-based radars. The method is based on the representation of the velocity fields via two scalar
potentials, expansion of these potentials in series in basis functions, and determination of the coefficients of expansion
according to the data of radar measurements as solutions of the corresponding variational problems. The errors of the procedure
of determination of the coefficients of expansion are removed by using a special regularization procedure based on information
theory. The proposed method enables one to fill gaps in the space and time series of radar measurements. We illustrate the
method by an example of numerical analysis of mesoscale and submesoscale (10–50 km) surface currents in the Monterey Bay (California,
USA) performed on the basis of the data of radar measurements carried out in August 1994.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 2, pp. 24–36, March–April, 2005. |
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