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首页> 外文期刊>Applied optics >Relationships between water attenuation coefficients derived from active and passive remote sensing: a case study from two coastal environments
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Relationships between water attenuation coefficients derived from active and passive remote sensing: a case study from two coastal environments

机译：主动和被动遥感得出的水衰减系数之间的关系：以两个沿海环境为例

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摘要

Relationships between the satellite-derived diffuse attenuation coefficient of downwelling irradiance (K_(d)) and airborne-based vertical attenuation of lidar volume backscattering (alpha) were examined in two coastal environments. At 1.1 km resolution and a wavelength of 532 nm, we found a greater connection between alpha and K_(d) when a was computed below 2 m depth (Spearman rank correlation coefficient up to 0.96), and a larger contribution of K_(d) to alpha with respect to the beam attenuation coefficient as estimated from lidar measurements and K_(d) models. Our results suggest that concurrent passive and active optical measurements can be used to estimate total scattering coefficient and backscattering efficiency in waters without optical vertical structure.
机译：在两个沿海环境中，研究了卫星衍生的向下辐射辐照度的扩散衰减系数（K_（d））和基于机载的激光雷达体积反向散射（alpha）的垂直衰减之间的关系。在1.1 km的分辨率和532 nm的波长下，当计算深度小于2 m时，我们发现alpha与K_（d）之间的联系更大（Spearman等级相关系数高达0.96），并且K_（d）的贡献更大相对于根据激光雷达测量和K_（d）模型估计的光束衰减系数，α为α。我们的结果表明，在没有光学垂直结构的水中，同时进行的被动和主动光学测量可用于估计总散射系数和反向散射效率。

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