Rapid Production of Ozone and Sequestration of NOx in Fire Plumes Emitted from Large Forest Fires Observed during WECAN

Smoke plumes from several large forest fires were sampled during the Western Wildfires, Clouds, Aerosols, and Nitrogen Experiment (WE-CAN) in the summer of 2018 over various regions of the western US. In cases where the plumes had enough buoyancy to be injected into the free troposphere above the boundary layer, very rapid ozone production and conversion of NO_x into PAN and other nitrogen reservoirs was observed. We will present a preliminary analysis of these observations using a simple 0-D modeling approach.