Abstract
An empirical optical model for estimating the concentration of suspended particulate matter (CSPM) was developed in the upper part of the Saint Lawrence Estuary based on remote sensing reflectance (Rrs) measurements corresponding to medium-resolution imaging spectrometer (MERIS) spectral channels 7 and 9 (i.e., wavelengths centered at 665 and 708 nm, respectively). Sensitivity of CSPM estimates to changes in mineral content of suspended particulates was investigated based on simulated Rrs values. For June 2012 measurements, CSPM varied with values following a power-type relationship (y = 235.7 x8.321, r2 = 0.7, N = 10). In addition, numerical experiments and analysis of regression type II showed that exponent parameter of this biogeo-optical model decreased as suspended particulates become more enriched in organic matter.
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