Kroll, J. H.; Cross, E. S.; Hunter, J. F.; Pai, S.; Wallace, L. M. M.; Croteau, P. L.; Jayne, J. T.; Worsnop, D. R.; Heald, C. L.; Murphy, J. G.; Frankel, S. L. Atmospheric Evolution Of Sulfur Emissions From K??lauea: Real-Time Measurements Of Oxidation, Dilution, And Neutralization Within A Volcanic Plume. Environmental Science & Technology 2015, 49 (7), 4129 - 4137.