Modeling the optical properties of mineral particles suspended in seawater and their influence on ocean reflectance and chlorophyll estimation from remote sensing algorithms

Applied Optics
Sławomir B Woźniak, Dariusz Stramski

Abstract

The optical properties of mineral particles suspended in seawater were calculated from the Mie scattering theory for different size distributions and complex refractive indices of the particles. The ratio of the spectral backscattering coefficient to the sum of the spectral absorption and backscattering coefficients of seawater, b(b)(lambda)/[a(lambda) + b(b)(lambda)], was analyzed as a proxy for ocean reflectance for varying properties and concentrations of mineral particles. Given the plausible range of variability in the particle size distribution and the refractive index, the general parameterizations of the absorption and scattering properties of mineral particles and their effects on ocean reflectance in terms of particle mass concentration alone are inadequate. The variations in the particle size distribution and the refractive index must be taken into account. The errors in chlorophyll estimation obtained from the remote sensing algorithms that are due to the presence of mineral particles can be very large. For example, when the mineral concentration is 1 g m(-3) and the chlorophyll a concentration is low (0.05 mg m(-3)), current global algorithms based on a blue-to-green reflectance ratio can produce a chlorophyll over...Continue Reading

Citations

Dec 5, 2015·Environmental Science and Pollution Research International·Kamila Haule, Włodzimierz Freda
Feb 17, 2009·Optics Express·Grace Chang, Amanda L Whitmire
Jun 15, 2012·Applied Optics·Tihomir Sabinov KostadinovNathalie Guillocheau
Jan 3, 2018·Frontiers in Marine Science·Watson W Gregg, Cécile S Rousseaux
Oct 19, 2017·Optics Express·Peng-Wang ZhaiRobert Frouin
Jan 3, 2020·Limnology and Oceanography·Rick A Reynolds, Dariusz Stramski
Feb 7, 2018·Optics Express·Lipi MukherjeeDavid M Winker
Apr 23, 2019·Global Biogeochemical Cycles·Roséanne BolNathan Briggs

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