作者
Demetrios Pagonis, Pedro Campuzano-Jost, Hongyu Guo, Doug A Day, Melinda Schueneman, Benjamin A Nault, Wyatt Brown, Alexander Laskin, Kyla SA Siemens, Matthew Mitchell Coggon, Joshua P DiGangi, Glenn S Diskin, Marta A Fenn, Georgios Gkatzelis, Johnathan W Hair, Hannah S Halliday, Joseph M Katich, John B Nowak, Anne Elizabeth Perring, PE Saide, Kanako Sekimoto, TJ Shingler, Laura Thapa, Carsten Warneke, Jose L Jimenez
发表日期
2020/12
期刊
AGU Fall Meeting Abstracts
卷号
2020
页码范围
A234-01
简介
The chemical composition of biomass burning organic aerosol (OA) evolves rapidly as it is transported downwind of a fire. Changes in composition are driven by dilution, evaporation, and secondary OA (SOA) production. Here we present airborne OA measurements from an extractive electrospray mass spectrometer (EESI) and an Aerodyne high-resolution Aerosol Mass Spectrometer (AMS) during FIREX-AQ. By combining the bulk OA composition measured by AMS with speciated OA composition measured by EESI, we quantify the relative contributions of SOA production and primary OA (POA) evaporation to the evolution of OA composition downwind of wildland fires. Evaporation rates of bulk OA and levoglucosan (a component of POA) are quantified through a combination of thermodenuder measurements and sampling smoke plumes at varying ambient temperatures. Rates of SOA production are quantified …
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D Pagonis, P Campuzano-Jost, H Guo, DA Day… - AGU Fall Meeting Abstracts, 2020