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Single-wavelength algorithms for in situ or remote sensing estimation of mean pigment concentration

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The bio-optical relationships between inherent and apparent optical properties, and between optical properties and phytoplankton pigment concentration (C) averaged in a layer (ΔZ), were derived from analysis of data collected during the period 1996-1998 in the Gulf of Aqaba (Eilat). Parametrization of these relationships was based on radiative transfer theory, Gershun's equation, minimization of model errors by least-square fitting, and on known optical models relating underwater remote sensed reflectance (Rrsw) with the ratio of backscattering (bb) to vertical attenuation coefficient (Kd) [or to absorption coefficient (a)]. These relationships explain a frequently used form of remote sensing algorithms for C estimation using ratio of water-leaving radiances measured at two or more wavelengths (). In this study, the possibility of using for this purpose a single wavelength in the blue range (=443 nm) within the framework of in situ and remote sensing algorithms for Case 1 waters was assessed.

Document Type: Research Article


Affiliations: 1: Faculty of Life Sciences Bar-Ilan University Ramat-Gan, 52900 Israel 2: Department of Geography Bar-Ilan University Ramat-Gan 52900 Israel

Publication date: April 1, 2004

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