Collaborative Research: RAPID--Measurements of Speciated Volatile and Semi-volatile Organic Compounds During the Fourth Fire Lab at Missoula Experiment (FLAME-IV)

本提案旨在于2012年10月15日至11月16日在蒙大拿州米苏拉举行的第四次米苏拉实验室火灾（FLAME-IV）期间测量挥发性和半挥发性有机化合物。研究内容包括：（1）挥发性有机化合物（VOCs）、半挥发性有机化合物（SVOCs）和其他物质在排放后几小时内的快速变化;（2）尚未鉴定的高分子量VOCs的排放，它有助于形成次级产物，如臭氧、二次有机气溶胶（SOA）和有机酸;（3）排放的痕量气体和粒子与云的相互作用。加州大学欧文分校小组将使用不锈钢罐收集全球重要燃料生物质燃烧排放物中的全部空气样本，然后使用多柱气相色谱法进行分析。迈阿密大学小组将使用高分辨率飞行时间质谱仪和固体吸附剂阱，测量选定的全部空气样本，将测量范围扩大到半挥发性范围。这些测量结果将产生关于烟雾的化学和物理特性、其演变及其与云的相互作用的重要新信息，鉴于这是一个多研究者项目，重点关注全球重要燃料在受控环境中的燃烧，将有可能检查最终允许在预测化学/气候模型中更好地参数化生物质排放影响的过程。该项目还将帮助开发下一代仪器，利用迈阿密大学的一种新的仪器能力，即一种高分辨率飞行时间质谱仪，通过痕量气体分析进行分析。预计从不同样品获得的高分辨率光谱将提供烟雾复杂成分及其在老化过程中变化的独特表征。该项目的结果将有助于迈阿密大学罗森斯蒂尔海洋和大气科学学院（RSMAS）高级环境质谱法研究生课程的开发。这项研究的结果将发表在同行评议的文献中，并将在国际跨学科会议上发表。该项目将包括来自代表性不足群体的成员作为本研究的参与者，参与抽样和分析测量。

This proposal is to measure speciated volatile and semi-volatile organic compounds during the Fourth Fire Lab at Missoula Experiment (FLAME-IV), to be held in Missoula, Montana from October 15 to November 16, 2012. Aspects of the investigation include: (1) the fast changes in volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs) and other species within the first few hours after emission; (2) emissions of as-yet unidentified higher molecular weight VOCs, which contribute to the formation of secondary products such as ozone, secondary organic aerosol (SOA) and organic acids; and (3) the interaction between emitted trace gases and particles with clouds. The University of California, Irvine group will collect whole air samples in the biomass burning emissions of globally important fuels using stainless steel canisters followed by analysis using multi-column gas chromatography. The University of Miami group will measure a selection of the whole air samples, extending the measurements into the semi-volatile range, using a high resolution time-of-flight mass spectrometer and solid adsorbent traps. Together these measurements will yield important new information about the chemical and physical properties of smoke, its evolution, and its interactions with clouds.Given that this is a multi-investigator project focusing on the combustion of globally important fuels in a controlled environment, it will be possible to examine processes that will eventually allow better parameterization of biomass emission impacts in predictive chemistry/climate models. The project will also help to develop next-generation instrumentation via trace gas analysis using a new instrumental capability at the University of Miami, a high resolution time of flight mass spectrometer. It is expected that the high resolution spectra obtained from the different samples will provide a unique characterization of the complex composition of smoke and its variations during aging. The results from this project will help in the development of a graduate course in Advanced Environmental Mass Spectrometry at the University of Miami's Rosenstiel School of Marine and Atmospheric Science (RSMAS). The results from this study will be published in the peer-reviewed literature and will be presented at international, interdisciplinary conferences. The project will include members from underrepresented groups as participants in this study, in both the sampling and analytical measurements.