Determination of submicrometer particle size distributions across a power plant plume

Submicrometer particle size distributions were spatially resolved across a power plant plume by inversion of the outputs of three continuous particle sensors. Total submicrometer particle surface and volume concentrations closely followed the SO2 profile. Particle concentrations in the nuclei size range 0.008-0.05 μm increased from background values to maxima in the plume edges. Nuclei concentrations were depressed in the plume center in the presence of increased particle surface concentration in the accumulation 0.05-1.0μm size range.