Estimation of near-infrared water-leaving reflectance for satellite ocean color data processing
Estimation of near-infrared water-leaving reflectance for satellite ocean color data processing
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DOI：
10.1364/oe.18.007521
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发表时间：
2010-03-29
期刊：
影响因子：
3.8
通讯作者：
Werdell, P. Jeremy
中科院分区：
文献类型：
--
作者：
Bailey, Sean W.;Franz, Bryan A.;Werdell, P. Jeremy
NASA海洋生物处理小组使用的大气校正算法要求在光谱的近红外区假设离开水面的反射率可以忽略不计。对于这一假设不成立的水域，使用光学模型来估计近红外离水反射率。我们将这一光学模型描述为对SeaWiFS任务长时间序列(2009年9月)的第六次再处理。光学模型的应用大大减少了浑浊和光学复杂水域中负的离水反射率反演的次数，并改进了与现场叶绿素a观测的一致性。在412 nm处的负离水反射率恢复减少了40%，而在490 nm处的负反射几乎被消除。(C)2010年美国光学学会
The atmospheric correction algorithm employed by the NASA Ocean Biology Processing Group requires an assumption of negligible water-leaving reflectance in the near-infrared region of the spectrum. For waters where this assumption is not valid, an optical model is used to estimate near-infrared water-leaving reflectance. We describe this optical model as implemented for the sixth reprocessing of the SeaWiFS mission-long time-series (September 2009). Application of the optical model resulted in significant reductions in the number of negative water-leaving reflectance retrievals in turbid and optically complex waters, and improved agreement with in situ chlorophyll-a observations. The incidence of negative water-leaving reflectance retrievals at 412 nm was reduced by 40%, while negative reflectance at 490 nm was nearly eliminated. (C) 2010 Optical Society of America