水体有机和无机颗粒组分变化对散射和后向散射特性影响研究

研究颗粒物的比例构成对散射及后向散射特性的影响，对推动水色遥感的发展具有重要的意义。本文结合2017年6月和9月秦皇岛附近海域的实测数据，获取了各站位有机颗粒（POM）、无机颗粒（PIM）的浓度以及散射、后向散射等光谱参数，并进行了相关性分析。结果表明，受水体颗粒物浓度的影响，各波段比后向散射系数的变化幅度明显增大，变异系数CV最大值出现在550 nm处；通过建立散射、后向散射系数与总悬浮颗粒物浓度（SPM）以及与PIM和POM之间的关系模型发现，水体的后向散射受水体颗粒物构成影响较大，与有机、无机颗粒物浓度之间的模型精度较高，均方根误差（RMSE）的变化范围为0.0094~0.0143，模型精度在700 nm处最好；同时，分析了无机颗粒物的比例构成（PIM/SPM）对散射效率和后向散射效率的影响，得出相对于散射效率Q_be，后向散射效率Q_bbe受无机颗粒物比例构成影响最大，但是Q_bbe与PIM/SPM的相关性并不是很高，决定系数R2为0.4。

Light scattering and backscattering of particles in relation to the proportions of the organic and inorganic particles

Studying the influence of the proportion of particles constitutes on the scattering and backscattering properties, which is of great significance for development of ocean color remote parameters at each station were obtained, and correlation analysis was performed.It showed that the amplitude of the backscattering coefficients variation at each wavelength was significantly increased by the influence of the particles, and the maximum value of the coefficient of variation (CV) appeared at the band 550 nm.And the relationship between scattering(b_p), backscattering coefficients (b_bp) and total suspended particulate concentration (SPM), PIM and POM were established respectively.It was found that the water backscattering was affected by the particle composition and the concentration of organic and inorganic particles.The accuracy of the model between b_b and particle composition is higher, and the root mean square error (RMSE) varies from 0.0094 to 0.0143.The best model accuracy appeared at band 700 nm.At the same time, the effect of PIM/SPM on scattering efficiency and backscattering efficiency was analyzed.It was concluded that the backscattering efficiency Q_bbe was the mostly affected by the proportion of inorganic particles relative to the scattering efficiency Q_be.But the relevance of Q_bbe and PIM/SPM is not very high, the coefficient of determination R2 is 0.4.