333-m and 111-m configuration plume cross sections. Vertical cross-sections of crosswind-integrated plume concentrations (4-km wide transect), as function of height above mean sea level (MSL) and distance downwind from source, for the 333-m mesoscale domain (left) and 111-m LES domain (right), averaged from 1700–1900 UTC (=1200–1400 LST). Integrated concentrations are normalized by Q/(Uz_i), where Q is source strength, U is mean wind speed, and z_i is mixed layer height. Concentration contours are shown in logarithmic intervals with adjacent colors representing a factor of two difference. Vertical black bar indicates mixed-layer height. DOI: https://doi.org/10.1525/elementa.247.f10