A microwave emissivity model of sea surface under wave breaking

• 来源期刊: 中国物理(英文版)
• 关键词: microwave emissivity effective medium approximation whitecaps wave breaking
• 年，卷（期）: 2005,（6）
• 页码范围: 1259-1264
• 页数: 6页
• 语种: 英文

摘要

With the 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 whitecap 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 37GHz.