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ABSTRACT: Specific inherent optical properties (SIOP) of the Berau coastal waters were derived from in situ measurements and inversion
of an ocean color model. Field measurements of water-leaving reflectance, total suspended matter (TSM), and chlorophyll a (Chl a) concentrations were carried out during the 2007 dry season. The highest values for SIOP were found in the turbid waters,
decreasing in value when moving toward offshore waters. The specific backscattering coefficient of TSM varied by an order
of magnitude and ranged from 0.003m2g−1, for clear open ocean waters, to 0.020m2g−1, for turbid waters. On the other hand, the specific absorption coefficient of Chl a was relatively constant over the whole study area and ranged from 0.022m2mg−1, for the turbid shallow estuary waters, to 0.027m2mg−1, for deeper shelf edge ocean waters. The spectral slope of colored dissolved organic matter light absorption was also derived
with values ranging from 0.015 to 0.011nm−1. These original derived values of SIOP in the Berau estuary form a corner stone for future estimation of TSM and Chl a concentration from remote sensing data in tropical equatorial waters.
KeywordsSubsurface irradiance reflectance-Total suspended matter-Chlorophyll a-Ocean optics-Bio-optical model-Tropical waters
Hydrobiologia 658(1):197-211. · 1.99 Impact Factor