This article describes a series of experiments performed in turbulent and quasi-laminar wind tunnel flows to further assess unipolarly ionized air as a tracer for examining the microstructure of diffusing plumes and puffs. The experimental techniques have been improved which, together with spectral and qualitative correlation analysis, have facilitated a more penetrating examination of ion plum/puff behavior. Some new insights into the electrostatic aspects of ionized air dispersion have also been gained.