Determining contributions of biomass burning and other sources to fine particle contemporary carbon in the western United States

摘要: Six-day integrated fine particle samples were collected at urban and rural sampling sites using Hi-Volume samplers during winter summer 2004–2005 as part of the IMPROVE (Interagency Monitoring PROtected Visual Environments) Radiocarbon Study. Filter from six (Grand Canyon, Mount Rainier, Phoenix, Puget Sound, Rocky Mountain National Park, Tonto Monument) analyzed for levoglucosan, a tracer biomass combustion, other species by High-Performance Anion-Exchange Chromatography with Pulsed Amperometric Detection (HPAEC-PAD). Contemporary carbon concentrations available previous isotope measurements Lawrence Livermore Laboratory. Primary contributions burning to measured contemporary estimated residential wood (winter) wild/prescribed fires (summer). Calculated ranged below detection limit more than 100% typically higher winter. Mannitol, sugar alcohol emitted fungal spores, was used determine spores carbon. Contributions reached up 13% in samples, sites. Concentrations methyltetrols, oxidation products isoprene, also HPAEC-PAD. Secondary organic aerosol (SOA) isoprene contribute 22% For each site, substantial portion unexplained primary or SOA oxidation. This fraction likely contains sources, including smoke emissions plant well meat cooking, debris, biological particles, bio-diesel sources. Loss levoglucosan atmospheric aging results an underestimate apportioned contributions.