Retrieving chlorophyll and nonchlorophyll matter from ocean color satellite data in Baltic case 2Y waters

Jean-Francois Berthon; Mark Dowell; Nicolas Hoepffner; Stefania Grossi

doi:10.1117/12.266467

6 February 1997 Retrieving chlorophyll and nonchlorophyll matter from ocean color satellite data in Baltic case 2Y waters

Jean-Francois Berthon, Mark Dowell, Nicolas Hoepffner, Stefania Grossi

Author Affiliations +

Proceedings Volume 2963, Ocean Optics XIII; (1997) https://doi.org/10.1117/12.266467
Event: Ocean Optics XIII, 1996, Halifax, Nova Scotia, Canada

Abstract

Based on in situ data collected in the Southern Baltic Proper at three different periods of the year this study investigates the possibility to empirically retrieve Chlorophyllous and Non Chlorophyllous matter absorption coefficients in the Baltic Sea using 'SeaWiFS' type spectral information. It relies on the classical relationship between 'remote-sensing' reflectance and the back-scattering and absorption coefficients of the in-water optically active components. The use of reflectance ratios minimizes the effect of the 'f/Q' variability if one assume its low wavelength dependency. A reflectance ratio can therefore be expressed as the product of the total absorption ratio and of the total back-scattering wavelength dependency, classically defined as a power law of the wavelength ratio. Empirical relationships, valid for the considered data set, are used to estimate the exponent N of this power law from specific reflectance ratios, the 443/510 and 510/550 ratios being the best candidates. It is thus shown that, in these yellow substances dominated waters, total absorption ratios could allow the estimation of non chlorophyllous matter absorption at 412 nm and of pigment absorption at 443 nm.

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Jean-Francois Berthon, Mark Dowell, Nicolas Hoepffner, and Stefania Grossi "Retrieving chlorophyll and nonchlorophyll matter from ocean color satellite data in Baltic case 2Y waters", Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); https://doi.org/10.1117/12.266467

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