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Aerodynamic roughness of the sea surface at high winds
Boundary-Layer Meteorology, 2007The role of the surface roughness in the formation of the aerodynamic friction of the water surface at high wind speeds is investigated. The study is based on a wind-over-waves coupling theory. In this theory waves provide the surface friction velocity through the form drag, while the energy input from the wind to waves depends on the friction velocity
Vladimir N. Kudryavtsev +1 more
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Changes in Sea Surface Roughness in Light Wind
2021Correct interpretation and application of remote sensing data from spacecraft requires detailed information about the sea surface. The structure and variability of the sea surface are analyzed under conditions that are most favorable for remote monitoring of processes occurring near the ocean–atmosphere boundary.
I. P. Shumeyko +2 more
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Remote sensing of the roughness of a fractal sea surface
Journal of Geophysical Research: Oceans, 1991One use of radar altimeters is to measure surface wind speeds through their effect on the roughness of the sea surface. The specular point reflection model is only appropriate for surfaces with roughness on scales which are large in relation to the radar wavelength. This may not be the case for ocean surfaces. Here we model the sea surface as a fractal
Yehuda Agnon, Michael Stiassnie
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The Simulation of Non-Gaussian Scattering on Rough Sea Surface
2018The simulation of a non-Gaussian scattering on rough surface based on local curvature approximation (NG-LCA) model is presented. The comparison between the NRCS result of LCA and the QuikSCAT scatterometer data shows that NG-LCA model can well explain the scattering way of the Upwind/downwind asymmetry.
Lei Fan, Guoxing Gao
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The calculation of infrared radiance of rough sea surface
ISAPE2012, 2012Based on the Cox-Munk sea model, we calculate the emissivity of rough sea surface without interaction between the wave facets, and the emissivity of rough sea surface considering about interaction between the wave facets. According to the emissivity of rough sea surface, we compute the radiance diances of rough sea surface based on the two emissivity ...
Yi Wang +3 more
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Comparison Studies on Sea Surface Roughness Schemes
Advanced Materials Research, 2012The data, originated from the RASEX experiment and the Surface Wave Dynamics Experiment. RASEX experiment took place at an offshore wind turbine site in the Baltic Sea in 1994, it is representative of the fetch-limited conditions; SWADE experiment was carried out off the Atlantic coast of the United States in 1990, it is representative of the wind-sea ...
Yu Ping Pan, Su Fang Ge, Wen Yu Sha
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On the action of rain in calming the sea and generating sea surface roughness
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 2003It is well known among sailors that rain tends to calm long sea waves. Additionally to the wave damping process, rain produces short scale roughness which becomes visible especially in low wind situations. The variation of sea surface roughness due to rain influences radar backscattering.
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The RCS computation of targets on the rough sea surface
2007 International Conference on Microwave and Millimeter Wave Technology, 2007The physical optic algorithm is applied in the simple and fast calculation of the RCS of the target over the sea surface with different wind speeds. The rough sea surface with different wind speeds is described by a simple empirical formula. The "fourth-path model" is invoked in a first-order approximation of the half-space contribution to the ...
Xu Yun-xue, Gong Shu-xi, Zhang Peng-fei
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Propagation over the rough sea surface
2000For parabolic equation modelling of forward scatter over a rough surface, we are concerned with the average field, corresponding to specular reflection. Most applications involve a non-homogeneous propagation medium, a situation which is extremely difficult to treat.
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An experimental setup for autonomous operation of surface vessels in rough seas
Robotica, 2013SUMMARYA small-scale experimental setup for autonomous target tracking of a surface vessel in the presence of obstacles is presented. The experiments are performed in simulated rough seas through wave, current, and wind generation in a small indoor pool.
Farshad Mahini +3 more
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