Abstract View
Modeling of Furan Oxidation (via OH and NO3) within Biomass-Burning Regimes Based on New Results from Chamber Experiments
BENJAMIN BROWN-STEINER, Matthew Alvarado, Taekyu Joo, Nga Lee Ng, AER
Abstract Number: 495
Working Group: Aerosol Chemistry
Abstract
We present the continuing development of a furan oxidation mechanism within the Aerosol Simulation Program (ASP) based on new and ongoing laboratory chamber experiments at the Georgia Tech Environmental Chamber (GTEC) facility. ASPv2.2 is a young biomass burning plume chemical mechanism that contains over 600 chemical species that merges portions of the MCMv3.2 with portions of RACM2. The importance of furan and furan-derived species found within biomass burning plumes, including furfural and methylfurans, for SOA formation are well-established, but constrains on chemical production regimes are lacking. The GTEC chamber experiments, which use a Filter Inlet for Gases and AEROsols coupled with time-of-flight chemical ionization mass spectrometer (FIGAERO-HR-ToF-CIMS) for the real-time measurement of oxidation products, are designed to determine the furan oxidation products and the O3 and SOA production under a range of biomass burning chemical regimes by testing different NOx levels (to simulate different NOx:VOC ratios), relative humidity, and temperature conditions. New experimental constraints under both dry (RH < 5%) and humid (RH ~ 50-60%) conditions inform the development of a furan oxidation mechanism. We present this mechanism, along with initial experimental results, and discuss remaining uncertainties.