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[1] Sampling of suspended particulates in oligotrophic environments is inherently difficult because of low ambient concentrations. The performance of a Laser In Situ Scattering and Transmissometry (LISST) series particle size analyzer is evaluated for use in such low-concentration environments. Five issues are studied for their effect on recorded particle size distributions: the instrument limits of detection, the kernel matrix used in the inversion of the scattered light distribution, the effect of particles sized outside the instrument inversion limits (1.25 μm–250 μm), the effect of ambient light conditions, and the effect of sampling in density stratified conditions. We evaluate a LISST-100X type B instrument using a series of small-scale lab experiments and concentrate mainly on fine particles ( 250 μm) show little effects on the size distribution, but small particles ( |
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