Showing papers by "Vladimir Kudryavtsev published in 2001"
TL;DR: In this article, the authors performed in situ investigations of surface waves based on the analysis of the fluctuations of radar signals at a wavelength of 1.2 cm and analyzed both the traditional modulation transfer function used to describe variations of the scattering cross-section for the scales of surface wave and the correlation of mean variations of radar signal level with the group structure of waving.
Abstract: On the oceanographic platform of the Marine Hydrophysical Institute of the Ukrainian National Academy of Sciences, we performedin situ investigations of surface waves based on the analysis of the fluctuations of radar signals at a wavelength of 1.2 cm. We analyzed both the traditional modulation transfer function used to describe variations of the scattering cross section for the scales of surface waves and the correlation of mean variations of the level of radar signals with the group structure of waving. This is of interest for applications in medium-resolution radar systems (−200–500m) recording the group structure of waving in the process of its smoothing. The experimental estimations of the amplitude of variations of radar signals caused by the group structure of waving are in good agreement with numerical results obtained with the help of a two-scale model of scattering of radar signals by the sea surface.
3 citations
TL;DR: In this article, the influence of films of surfactants on the spectrum of short wind waves and the parameters of the lowest layer of the atmosphere was studied. And the maximum influence of the films on the exchange coefficients was attained for U∼10 m/s.
Abstract: With the help of a combined model of wind and waves, we study the influence of films of surfactants on the spectrum of short wind waves and the parameters of the lowest layer of the atmosphere. It is shown that the films of surfactants decrease the roughness of the sea surface as a result of suppression of short wind waves, which decreases the coefficient of resistance of the sea surface and the coefficient of turbulent heat exchange. The maximum influence of films on the exchange coefficients is attained forU∼10 m/s. In this case, the relative decrements of the coefficients of resistance and turbulent heat exchange are equal to 15 and 9%, respectively.
2 citations