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Importance of Aerosol Vertical Structure in Satellite Ocean-Color Remote Sensing

机译：气溶胶垂直结构在卫星海洋彩色遥感中的重要性

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The vertical distribution of absorbing aerosols affects significantly the reflectance of the ocean-atmosphere system. The effect, due to the coupling between molecule scattering and aerosol absorption, is important in the visible, especially in the blue, and becomes negligible in the near-infrared. Differences between top-of-atmosphere reflectance obtained with distinct vertical distributions increase with the sun, and view zenith angle, and the aerosol optical thickness, and with decreasing scattering albedo, but are practically independent of wind speed. In atmospheric correction algorithms, these differences are directly translated into errors on the retrieved water reflectance. They may reach large values even for small aerosol optical thickness, preventing accurate retrieval of chlorophyll concentration. A method has been developed to estimate aerosol altitude from data in the oxygen A-band of the MERIS, and POLDER sensors. The method is sufficiently sensitive to improve retrievals of water reflectance and chlorophyll concentration in the presence of absorbing aerosols.
机译：吸收性气溶胶的垂直分布会显着影响海洋-大气系统的反射率。由于分子散射和气溶胶吸收之间的耦合，这种影响在可见光中很重要，尤其是在蓝色中，而在近红外中则可以忽略不计。在不同的垂直分布下获得的大气层顶部反射率之间的差异随太阳和天顶角，气溶胶光学厚度以及散射反照率的增加而增加，但实际上与风速无关。在大气校正算法中，这些差异直接转换为所获取的水反射率的误差。即使对于较小的气溶胶光学厚度，它们也可能达到较大的值，从而阻止了对叶绿素浓度的准确获取。已经开发出一种根据MERIS和POLDER传感器的氧气A波段中的数据估算气溶胶高度的方法。该方法足够灵敏，可以在存在吸收性气溶胶的情况下改善对水反射率和叶绿素浓度的恢复。

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