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Remote sensing of oligotrophic waters: model divergence at low chlorophyll concentrations

机译:低营养水的遥感:低叶绿素浓度下的模型发散

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摘要

The performance of the OC2 Sea-viewing Wide Field-of-view Sensor (SeaWiFS) algorithm based on 490-and 555-nm water-leaving radiances at low chlorophyll contents is compared with those of semianalytical models and a Monte Carlo radiative transfer model. We introduce our model, which uses two particle phase functions and scattering coefficient parameterizations to achieve a backscattering ratio that varies with chlorophyll concentration. We discuss the various parameterizations and compare them with existent measurements. The SeaWiFS algorithm could be confirmed within an accuracy of 35% over a chlorophyll range from 0.1 to 1 mg m~(-3), whereas for lower chlorophyll concentrations we found a significant overestimation of the OC2 algorithm.
机译:将基于490 nm和555 nm的低叶绿素含量的离水辐射率的OC2海景宽视野传感器(SeaWiFS)算法的性能与半分析模型和Monte Carlo辐射传递模型的性能进行了比较。我们介绍了我们的模型,该模型使用两个粒子相函数和散射系数参数化来实现随叶绿素浓度变化的反向散射比。我们讨论了各种参数设置,并将它们与现有的测量结果进行比较。在0.1至1 mg m〜(-3)的叶绿素范围内,可以确认SeaWiFS算法的准确度在35%以内,而对于较低的叶绿素浓度,我们发现OC2算法存在明显的高估。

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