Effect of Marine and Land Convection on Wet Scavenging of Ozone Precursors Observed During a SEAC⁴RS Case Study

Convective clouds are important for both the vertical redistribution of tropospheric trace gases and removal, via microphysical scavenging, soluble gas precursors ozone. We investigate wet scavenging formaldehyde (CH2O), hydrogen peroxide (H2O2), methyl (CH3OOH) in quasi-marine land convective storms over Texas, USA observed on 18 September 2013 during SEAC4RS campaign. Cloud-resolving simulations using Weather Research Forecasting model with Chemistry (WRF-Chem) were performed to understand effect entrainment, efficiency (SE), ice physics processes these varying solubility. While marine convection can have distinctly different properties, we did not find significant differences SEs CH2O, H2O2, or CH3OOH. The 44%–53% CH2O 85%–90% H2O2 consistent our previous studies from 2012 DC3 field experiment storms. Using WRF-Chem simulations, retention factor (rf) was determined be 0.5–0.9, which is higher than found studies. show that rf airmass multicell severe hypothesize shattering may affect values. CH3OOH (39%–73%) expected Henry's Law equilibrium. recent suggest measurements interference due methane diol, this cannot fully explain higher-than-expected here DC3, suggesting further research needed redistribution.