The transport of Asian dust particles (KOSA) through theatmosphere to the Northwest Pacific is the most intensive one of thiskind on the globe and is important in terms of the geochemical oceancycle. The dust particles are also known to affect atmosphericcorrection process of satellite ocean color data, resulting in erroneousestimation of phytoplankton pigment concentration which, in turn,affects the proper evaluation of primary production in the area.Considering this problem, the authors propose a modified atmosphericcorrection scheme for Nimbus-7/CZCS data, based on the standard Gordon's(1983) algorithm. To process the imagery the authors assumed thatnormalized water-leaving radiance at 550 nm was constant and thataerosol single scattering albedo at 550 nm covaries with the spectraldependency of aerosol scatterance. The single scattering albedo and theoptical depth of aerosol at 550 nm are determined from the 550 nm and670 nm channels by pixel-wise iterative procedures. The scheme processesdata for other channels by assuming a spectral dependency of aerosolsingle scattering albedo modeled after obtaining a typical Asian dustimage. The method was applied to selected Japanese CZCS scenes, and thederived phytoplankton pigment concentration was compared with Gordon'salgorithm. For images with well-behaved atmospheric condition, theresults in phytoplankton pigment concentration mere overestimated byGordon's method. The scheme is considered useful to correct for theatmospheric effect of absorptive aerosol
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