Gordon H R
Department of Physics, University of Miami, Coral Gables, Florida 33124, USA.
Appl Opt. 1999 May 20;38(15):3166-74. doi: 10.1364/ao.38.003166.
We have reexamined the contribution of Raman scattering to the water-leaving radiance in case 1 waters by carrying out radiative transfer simulations that combine the latest reported measurements of the absorption coefficient of pure water with direct measurements of the spectral variation of the Raman-scattering coefficient. The resulting contribution of Raman scattering is then compared with experimental measurements of the water-leaving radiance, and the fractional contribution of radiance produced by Raman scattering to the total radiance measured at a given wavelength is determined. The results show that (1) the contribution of Raman scattering to the water-leaving radiance in an ocean of pure seawater is as much as 50-100% larger than earlier predictions, and (2) the Raman contribution does not decay as rapidly with increasing concentrations of chlorophyllouslike pigments C as predicted earlier. In fact, the Raman fraction for C <or= 1 mg/m(3) is approximately >8% at wavelengths of interest in ocean color remote sensing and therefore cannot be ignored in ocean color modeling.
我们通过进行辐射传输模拟，重新审视了拉曼散射对一类水体中离水辐射率的贡献。该模拟结合了最新报道的纯水吸收系数测量值以及拉曼散射系数光谱变化的直接测量值。然后将所得的拉曼散射贡献与离水辐射率的实验测量值进行比较，并确定在给定波长下由拉曼散射产生的辐射率对总辐射率的分数贡献。结果表明：（1）在纯海水中，拉曼散射对离水辐射率的贡献比早期预测值大50% - 100%；（2）拉曼贡献并不像早期预测的那样随着类叶绿素色素C浓度的增加而迅速衰减。事实上，在海洋颜色遥感感兴趣的波长下，当C≤1mg/m³时，拉曼分数约>8%，因此在海洋颜色建模中不能忽略。
