强壮前沟藻的后向散射特性研究

基于2012年7月藻类培养实验期间的实测生物-光学数据，分析了强壮前沟藻的后向散射特性及其影响因素。结果表明，强壮前沟藻的后向散射系数值具有光谱变化性，并随叶绿素浓度的升高而增大，两者之间呈很好的幂函数关系，相关系数R2最小值可达0.96;此外，由于色素的吸收作用，使得其光谱形状会随叶绿素的变化而变化;同时获得的后向散射比率620 nm处的变化范围在0.006 4～0.011 6之间;总体上，各波段颗粒物后向散射比率也呈现随叶绿素浓度增加而增大的趋势，但在高叶绿素浓度下，这种变化规律并不明显，并且就其光谱形状而言，无论叶绿素浓度高低，其光谱形状始终保持一致;颗粒密度是影响后向散射比率的主要因素之一，两者之间呈幂函数关系，相关系数r在620 nm处高达0.98。

Backscattering Characteristics of Amphidinium carterae Hulburt

Variability of the backscattering characteristics of the alga amphidinium carterae hulburt and its interpretation were examined using the measured data performed during July 2012 in the laboratory. The results indicated that the backscattering coefficient has the characteristic of spectral variability, and was highly power correlated with the chlorophyll concentration, the minimum of the correlation coefficient reached up to 0.96; otherwise, the shape of the particulate backscattering coefficient spectra was also changed from the low chlorophyll concentration to the higher concentration because of the influence of chlorophyll absorption. At the same time, the authors got another value of the particulate backscattering ratio ranging between 0.006 4 and 0.011 6 at 620 nm, although a global increase in particulate backscattering ratio with growing chlorophyll concentration was also visible, but the regularity is not obviously especially at the higher chlorophyll concentration and unlike backscattering coefficient, the spectral shapes of the backscattering ratio remained constant. The authors also found that particle density was one of the main factors controlling the variability of particles backscattering ratio for the pure algal water, and the authors fit a power law function to them and the correlation coefficient at 620 nm was as high as 0.98.