Estimation of the inherent optical properties of natural waters from the irradiance attenuation coefficient and reflectance in the presence of Raman scattering.
Estimation of the inherent optical properties of natural waters from the irradiance attenuation coefficient and reflectance in the presence of Raman scattering.
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DOI：
10.1364/ao.39.003001
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发表时间：
2000-06
期刊：
影响因子：
1.9
通讯作者：
H. Loisel;D. Stramski
中科院分区：
文献类型：
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作者：
H. Loisel;D. Stramski
通过辐射传输模拟，我们开发了一个模型，用于根据海面正下方的辐照度反射率 R(0-) 以及海面和第一衰减深度之间的下降流辐照度的平均衰减系数 1 来估计上层海洋的吸收 a、散射 b 和后向散射 b(b) 系数。该模型考虑了水的拉曼散射，并且不需要对 a、b 和 b(b) 的光谱形状进行任何假设。在蓝色和绿色光谱区域中获得了 a 和 b(b) 的最佳估计值，其中在水中叶绿素浓度的较宽范围内预计误差为百分之几至 <10%。该模型对于卫星海洋颜色应用非常有用，因为模型输入 R(0-) 和 1 可以从遥感中检索，而模型输出 a 和 b(b) 是遥感反射率的主要决定因素。
By means of radiative transfer simulations we developed a model for estimating the absorption a, the scattering b, and the backscattering b(b) coefficients in the upper ocean from irradiance reflectance just beneath the sea surface, R(0-), and the average attenuation coefficient for downwelling irradiance, 1, between the surface and the first attenuation depth. The model accounts for Raman scattering by water, and it does not require any assumption about the spectral shapes of a, b, and b(b). The best estimations are obtained for a and b(b) in the blue and green spectral regions, where errors of a few percent to <10% are expected over a broad range of chlorophyll concentration in water. The model is useful for satellite ocean color applications because the model input, R(0-) and 1, can be retrieved from remote sensing and the model output, a and b(b), is the major determinant of remote-sensing reflectance.