气泡/泡沫覆盖粗糙海面电磁散射的修正双尺度法研究

提出了风驱粗糙海面覆盖水气泡层的‘体-面’复合模型.基于修正的双尺度粗糙面散射理论、MIE理论和矢量辐射传输理论，比较了水气泡与实心水粒子的电磁散射特性的差异，分析了海面泡沫覆盖率与风速、气-海温差的关系.在有、无泡沫层情形下，采用高斯和经验海谱，讨论了单站、双站散射系数与入射角、方位角、风速、风向、极化等参量的关系，并将数值计算的结果与相关文献的测量值进行了比较和分析. 关键词： 电磁散射 海面复合模型 修正双尺度法 MIE

Study of the electromagnetic scattering from the rough sea surface with bubbles/foams by the modified two-scale method

A volume-surface composite model of rough sea surfaces with water bubble layer driven by wind is presented in this paper. Based on the modified two-scale rough surface scattering theory, MIE theory and VRT （vector radiative transfer） theory, the difference of electromagnetic scattering properties of the water bubbles compared with those of water particles is investigated. The relations between the foam coverage of the sea surface and wind speed and air-sea temperature difference are analyzed. The dependence of back- and bistatic-scattering coefficient of Gaussian rough surface and empirical sea surface with/without foam layer on the incident and azimuthal angle, the wind speed, the wind direction, as well as the polarization are discussed in detail. The results of numerical simulations are analyzed and compared with the measured data from the relevant references.