Urban inland wintertime N<sub>2</sub>O<sub>5</sub> and ClNO<sub>2</sub> influenced by snow-covered ground, air turbulence, and precipitation

Abstract. The atmospheric multiphase reaction of dinitrogen pentoxide (N2O5) with chloride-containing aerosol particles produces nitryl chloride (ClNO2), which has been observed across the globe. photolysis ClNO2 chlorine radicals and nitrogen dioxide (NO2), alter pollutant fates air quality. However, effects local meteorology on near-surface production are not yet well understood, as most observational modeling studies focus periods clear conditions. During a field campaign in Kalamazoo, Michigan, from January–February 2018, N2O5 were measured using chemical ionization mass spectrometry, simultaneous measurements particulate matter meteorological parameters. We examine impacts turbulence, precipitation (snow, rain) fog, ground cover (snow-covered bare ground) abundances N2O5. mole ratios lowest during lower turbulence statistically significantly different between snow-covered ground. In contrast, highest, average, over ground, due to saline snowpack production. Both lowest, rainfall fog because scavenging, scavenging by droplets likely contributing increased nitrate concentrations. These observations, specifically those active highlight important processes, including wet production, that govern variability chemistry missed when considering only