风浪微结构的光学反射特征的实验研究  

Optical Reflectance of Wind Wave Fine Structure Measured in the Laboratory

作　　者：何晓晶[1] 吕红民[1] 文凡[1] 

机构地区：[1]中国海洋大学物理海洋重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2007年第S1期53-60,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(40276006)资助

摘　　要：采用光学方法对实验室风浪微结构进行观测:用一束平行光照射到水面,观测和记录水面的后向反射截面情况,获得了不同风速、不同风浪阶段的风浪微结构的基本特征;通过对光学后向反射截面的分布和占空比情况分析发现,在低风速情况下风浪表面斜率较之高风速状况下具有更广的分布范围,也更加复杂;迎风面和背风面的斜率分布并不相同,但随风速增大,差别逐渐变得不明显;平均波面斜率角随风速非单调变化。The fine structure of laboratory wind-wave surfaces was investigated using an optical method.A parallel light,incident on the wind wave surface,was backscattered by specular facets'perpendicular to the in- cident angle.These specular facts,which represented the fine structure,were video-recorded and quantitatively analyzed by image processing techniques.The basic characteristics of the microwaves under different wind speeds and stages were gained.Through analysis of the optical backscattering sections and duty cycles,we found that compared with high speed conditions,a wider range and more complex slope distribution of wind- wave surfaces is found under low-speed winds.The windward and leeward slope distributions were not the same,but with the increase of wind speed,the difference gradually became invisible.The average wave slope varied non-monotonicly with wind speed.

关 键 词：风浪微结构 波面斜率角 后向反射 

分 类 号：P733.3[天文地球—物理海洋学]