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Spectral absorption coefficients of the total particulate, ap(λ), nonalgal particulate, ad(λ), and phytoplankton pigment, aph(λ), in the Pearl River estuary and its vicinity waters were determined using the quantitative filter technique. The particulate absorption ap(443) ranged from 0.04 to 1.82 m−1, with the corresponding aph(443) ranging from 0.016 to 0.484 m−1. Two typical spectral patterns...
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