Abstract With effective medium approximation theory of composites, a remedial model is proposed for estimating the microwave emissivity of sea surface under wave breaking driven by strong wind on the basis of an empirical model given by Pandey and Kakar. In our model, the effects of the shapes of seawater droplets and the thickness of whitecaps layer (i.e. a composite layer of air and sea water droplets) over the sea surface on the microwave emissivity are investigated by calculating the effective dielectric constant of whitecaps layer. The wind speed is included in our model, and the responses of water droplets shapes, such as sphere and ellipsoid, to the emissivity are also discussed at different microwave frequencies. The model is in good agreement with the experimental data of microwave emissivity of sea surface at microwave frequencies of 6.6, 10.7 and 37 GHz.
Received: 03 December 2004
Revised: 05 February 2005
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 40476062, 10374026) and the National High Technology Development Program of China (Grant No. 2002AA639270)
Cite this article:
Wei En-Bo (魏恩泊), Ge Yong (葛勇) A microwave emissivity model of sea surface under wave breaking 2005 Chinese Physics 14 1259
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