水-气界面参数和二向性影响因素交互作用研究

Interaction of Influencing Factors to Bidirection and Air-Water Interface Parameter in Turbid Water Body

基于光学辐射传输软件HYDROLIGHT,模拟不同外界和水质条件下水气界面透射率T,Gordon模型参数f和二向性因子Q,研究风速、太阳天顶角、单次反照率和拉曼散射对T、f和Q及其组合f/Q的影响和交互作用,确定T、f、Q和f/Q的主导影响因子,以期为确定水色反演算法误差来源以及减小反演误差提供定量的依据。研究结果表明,T、f和Q的主导影响因素为太阳天顶角,单次反照率和风速对T、f和Q的影响相对较小,而对f/Q影响最大是单次反照率,其次是太阳天顶角,风速最小,且各影响因素之间具有较强的交互作用。高散射特性水体中,拉曼散射对f、f/Q和T的影响可忽略不计;黄质(CDOM)和叶绿素的荧光特性对f和f/Q的影响随着叶绿素和CDOM浓度的增加不断减小,但在高CDOM和叶绿素浓度的富营养化水体中该影响仍难以忽略。

In order to provide a quantitative evidence that confirms the error source and reduce the retrieved error in the retrieved model of water color,transmissivity,parameter of Gordon model,bidirectional factor under the different conditions of environment and water quality are simulated based on the software of optical radiative transfer model HYDROLIGH.The interactions of wind speed,solar zenith and single reflectivity to T,f,Q and f/Q are analyzed,the primary influecing factors of T,f,Q and f/Q are determined.The primary influencing factor of T,f and Q is solar zenith relatively,the influences of single reflectivity and wind speed to T,f and Q are much smaller.The leading influencing factor of f/Q is single reflectivity,the second is solar zenith,and the third is wind speed,the interaction among the influencing factors is much stronger.The influence of Raman scattering on T,f and f/Q can be neglected in the high-scattering water.The effects of colored dissolved organic matter（CDOM） and chlorophyll＇s fluorescence on f and f/Q are decreasing with the increase of concentration of CDOM and chlorophyll,but the effects cannot be ignored in eutrophic water body with high concentration of CDOM and chlorophyll.