CAREER: Emissions and Chemical Impacts of Atmospheric Volatile Organic Compounds (VOCs) from Western United States Wildfires

CAREER项目将提高对美国西部野火挥发性有机化合物（VOCs）来源和对大气影响的认识。据估计，生物质燃烧是全球voc的第二大主要来源。VOCs作为臭氧（O3）和二次有机气溶胶（SOA）的前体在大气中发挥着关键作用，并影响羟基自由基（OH）水平，从而控制大多数空气污染物的寿命。该项目将结合实验室实验数据、飞机和地面站以前和新的现场测量数据，以及3D化学传输模型，以研究野火挥发性有机化合物的区域和全球影响。本研究的主要任务包括：(1)开展实验室实验，改进质子转移反应飞行时间质谱法识别和定量大气呋喃的分析方法；(2)在MT . Missoula的一个长期监测点对VOCs和其他微量气体进行新的地面测量，以更好地量化美国西部与火灾有关的VOCs丰度和变异性的关键控制；(3)在GEOS-Chem化学运输模型（CTM）中纳入呋喃和其他两种挥发性有机化合物的新化学和排放；(4)使用具有改进的火VOC表示的GEOS-Chem来解释最近飞机和地面运动中以前和新的原位测量结果。该项目将在区域到全球范围内对挥发性有机化合物的来源和野火的化学影响提供新的定量限制。教育和推广计划包括在一个动手科学中心开发一个带有迷你空气质量监测站的野火烟雾展览，以加强K-12学生对野火烟雾和空气污染的了解。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This CAREER project will improve knowledge about the sources and atmospheric impacts of volatile organic compounds (VOCs) from western U.S. wildfires. Biomass burning is estimated to be the second-largest primary sources of VOCs globally. VOCs play a key role in the atmosphere as precursors of ozone (O3) and secondary organic aerosol (SOA), and affect hydroxyl radical (OH) levels, that in turn control the lifetime of most air pollutants. This project will combine data from laboratory experiments, and previous and new field measurements from aircraft and ground stations, with a 3D chemical transport model to examine the regional and global impacts of VOCs from wildfires.This research includes tasks that: (1) carry out laboratory experiments to improve the analytical approach for identifying and quantifying atmospheric furans using Proton Transfer Reaction Time-of-Flight Mass Spectrometry; (2) perform new ground measurements for VOCs and other trace gases at a long-term monitoring site in Missoula, MT, to better quantify critical controls on the abundance and variability of fire-related VOCs in the western U.S.; (3) incorporate new chemistry and emissions for furans and two other VOCs in the GEOS-Chem chemical transport model (CTM); and (4) use the GEOS-Chem with improved fire VOC representation to interpret the previous and new in-situ measurements from recent aircraft and ground campaigns. The project will provide quantitative new constraints on VOCs' sources and chemical impacts from wildfires on a regional to global scale.The education and outreach plan includes the development of a wildfire smoke exhibit with a mini air quality monitoring station at a hands-on science center to enhance K-12 student learning about wildfire smoke and air pollution.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.