Biomass burning emissions from wildfires and agricultural burning remain poorly constrained and impact the atmosphere in complex ways. Smoke affects atmospheric composition, chemistry, air quality, public health, weather, and climate, with spatial scales that range from local to global. Recent laboratory, field, remote sensing, and modeling studies provide a better understanding of biomass burning emissions and their chemical evolution and transport, air quality implications, and climate impacts. We welcome presentations related to atmospheric sciences, that investigate smoke dependencies on fuels and fuel consumption, chemical and physical processes of biomass burning, and their implications for local, regional and global atmospheric composition. This includes studies based on laboratory experiments, field campaigns, satellite retrievals, and modeling efforts over all temporal and spatial scales and any geographical region.