Modeling the role of HONO in the plume chemistry of boreal forest biomass burning emissions during the summer 2009 ARCTAS campaign

3-20% of NOy in the flame front of biomass burning, as determined from field and lab studies, is HONO. Because HONO is readily photolyzed, it serves as a short-term reservoir for HOx and NOx. As the HONO is lost to photolysis, it affects NOy partitioning as well as O3 formation/loss. Airborne field studies provide an opportunity to constrain model initial conditions and compare the evolution of model chemistry to actual in situ observations of plume evolution, yielding a direct test of the model chemistry. We used the Aerosol Simulation Program with a Lagrangian parcel model to track the impact of HONO on biomass burning chemistry for plumes measured during the summer 2008 portion of the ARCTAS campaign by instruments aboard the NASA DC-8.