RAPID: Northern California Wildfire Emissions and their Atmospheric Chemical Transformations in a Highly Populated Urban Region

这项RAPID研究的重点是分析2017年10月10日开始在纳帕和索诺玛县发生的大规模野火燃烧期间收集的数据和样本。从火灾开始的大约两周内收集样本，通过旧金山湾区主要污染事件的时期，这些事件是由生物质燃烧排放与城市空气污染的相互作用造成的。大火还烧毁了5000多所房屋和商业建筑，燃烧的家庭和商业物品所产生的排放物通常不会在更偏远的野火中发现。这项研究的重点是引起眼睛和喉咙刺痛、关闭学校和减少户外活动的火灾排放，预计将引起公众的极大兴趣。这项工作将量化这些火灾排放对观测到的有机气溶胶浓度的贡献，并记录这种贡献如何随着大气老化而变化。预计这将导致查明可能影响生物质燃烧排放物老化的其他产生有机气溶胶的主要和次要来源。气体/颗粒分配数据将用于阐明二次有机气溶胶形成机制的信息。烟柱老化过程中观测提供的时间和化学分辨率将是研究火焰排放和转化过程的重要工具。

This RAPID research focuses on the analysis of data and samples collected during the massive wildfires burning in Napa and Sonoma Counties that began on October 10, 2017. Samples were collected from the beginning of the fires for approximately 2 weeks, through periods of major pollution episodes in the San Francisco Bay region that resulted from the interaction of biomass burning emissions with urban air pollution. The fires also burned more than 5000 homes and commercial structures, resulting in emissions from the burning of household and commercial items not typically found in emissions from more remote wildfires. This research is expected to be of great public interest due to the focus on emissions from fires that caused stinging eyes and throats, closed schools, and curtailed planned outdoor activities.This work will quantify the contribution of emissions from these fires to the observed concentrations of organic aerosol, and document how this contribution changes with atmospheric aging. It is expected to lead to the identification of additional sources contributing to organic aerosol, both primary and secondary, that may influence the aging of the biomass burning emissions. Gas/particle partitioning data will be used to elucidate information on the formation mechanisms for secondary organic aerosol. The temporal and chemical resolution provided by the observations during plume aging will be an important tool for investigating fire emission and transformation processes.