Much of the Red Sea is considered to be a typical oligotrophic sea having very low chlorophyll-a concentrations. Few existing studies describe the variability of phytoplankton biomass in the Red Sea. This study evaluates the resulting chlorophyll-a values computed with different chlorophyll algorithms (e.g., Chl_OCI, Chl_Carder, Chl_GSM, and Chl_GIOP) using radiances derived from two different atmospheric correction algorithms (NASA standard and Singh and Shanmugam (2014)). The resulting satellite derived chlorophyll-a concentrations are compared with in situ chlorophyll values measured using the High-Performance Liquid Chromatography (HPLC). Statistical analyses are used to assess the performances of algorithms using the in situ measurements obtain in the Red Sea, to evaluate the approach to atmospheric correction and algorithm parameterization.
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