Curran R J
Appl Opt. 1972 Aug 1;11(8):1857-66. doi: 10.1364/AO.11.001857.
Measurements made of the surface level albedo for ocean water containing various concentrations of phytoplankton indicate a strong correlation between wavelength dependent albedo ratios and phytoplankton chlorophyll concentration. To sense surface level albedo ratios from space platforms it is necessary to correct for the scattering and absorption properties of the atmosphere for the wavelengths in question. Atmospheric scattering models were constructed to calculate corrections at two wavelengths, 0.46 mum and 0.54 mum. The relationship between albedo ratios at the top of the atmosphere and at surface level was made for several different aerosol optical depths. Assuming a natural background uncertainty in the aerosol optical depth of 0.1 it is found that the chlorophyll concentration may be determined to within one standard deviation of from 0.5 mg to 2.5 mg/m(3), depending upon the solar zenith angle at the time of measurement. By remotely sensing the aerosol optical depth to a greater accuracy it appears feasible to detect chlorophyll concentrations to an uncertainty approaching 0.1 mg/m(3).
对含有不同浓度浮游植物的海水表面反照率进行的测量表明，波长依赖型反照率比值与浮游植物叶绿素浓度之间存在很强的相关性。为了从太空平台感知表面反照率比值，有必要针对相关波长校正大气的散射和吸收特性。构建了大气散射模型，以计算在0.46微米和0.54微米这两个波长处的校正值。针对几种不同的气溶胶光学厚度，得出了大气顶部和表面水平处反照率比值之间的关系。假设气溶胶光学厚度的自然背景不确定性为0.1，结果发现，根据测量时的太阳天顶角，叶绿素浓度可以在0.5毫克至2.5毫克/立方米的一个标准差范围内确定。通过以更高的精度遥感气溶胶光学厚度，检测不确定性接近0.1毫克/立方米的叶绿素浓度似乎是可行的。
