Introduction
Included in the Supporting Information are a description of the
instrumentation and measurement methods used in the paper (Text S1), and
a figure (Figure S1) showing aerosol size distributions for six flights
with repeated passes through smoke plumes at different distances from
the smoke source. Also included in that figure are total aerosol number
concentrations and geometric mean aerosol diameters as a function of
calculated plume age. Plume age was calculated from the distance to the
fire center and average wind speed as in Garofalo et al. (2019).