RAPID: Emissions and Fate of Volatile Organic Compounds (VOCs) Emitted from Australian Wildfires during the COALA-JOEYS Campaign

RAPID：COALA-JOEYS 活动期间澳大利亚野火排放的挥发性有机化合物 (VOC) 的排放和归宿

• 批准号: 2016646
• 负责人: Jennifer Kaiser
• 金额: $ 10.4万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-02-15 至 2022-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2016646&HistoricalAwards=false
• 关键词: RAPID; Emissions; Fate; Volatile; Organic

This RAPID project takes advantage of the ongoing participation of a US investigator in an Australian campaign to study the vegetative emissions of atmospheric compounds in pristine and in polluted conditions in New South Wales Australia, enabling the investigator to extend these efforts to study the emissions from the massive wildfires now occurring in that region. The data from this project will be evaluated in comparison to wildfire studies in the US, and help to develop a better understanding of how the chemical composition of wildfire emissions vary depending on the material burned. The results have immediate relevance to the general public, as large populations are currently being exposed to Australian bushfire smoke with unknown chemical composition.The COALA-JOEY’s (Characterizing Organics and Aerosol Loading over Australia - Joint Organic Emissions Year-round Study) campaign in Australia will be extended to focus on emissions from ongoing Australian wildfires. Samples will be obtained in the plumes of smoke from the fires using a proton-transfer-reaction time-of-flight mass spectrometer to identify volatile organic compounds (VOCs), including intermediate oxidation products and semivolatile VOCs. This data is expected to help resolve some of the large uncertainties in the formation of oxidized VOCs in fire plumes. In particular, the emissions of fire-related formic acid (HCOOH) are especially uncertain in Australian fires. Atmospheric HCOOH contributes to precipitation acidity and chemistry, and its sources are generally not well captured in global models. Constraining primary emissions of HCOOH and investigating secondary formation mechanisms will provide a valuable constraint on global HCOOH budgets as well as on the ultimate fate of biomass burning emissions. This project will advance the knowledge of VOC emissions from Australian wildfires, their variability and dependencies, and subsequent VOC oxidation.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.

这个快速项目利用了一名美国调查员正在参与的一项澳大利亚运动，研究澳大利亚新南威尔士州原始和污染条件下大气化合物的植物排放，使调查员能够扩大这些努力，研究该地区目前发生的大规模野火的排放。该项目的数据将与美国的野火研究进行比较，并有助于更好地了解野火排放物的化学成分如何根据燃烧的材料而变化。这些结果对公众有直接的意义，因为目前有大量的人暴露在澳大利亚野火烟雾中，烟雾的化学成分未知。澳大利亚的COALA-JOEY（澳大利亚有机物和气溶胶负荷特征--联合有机排放全年研究）活动将扩大到关注澳大利亚野火的排放。将使用质子转移反应飞行时间质谱仪从火灾产生的烟雾中获取样本，以识别挥发性有机化合物（VOC），包括中间氧化产物和半挥发性VOC。预计这些数据将有助于解决火灾羽流中氧化挥发性有机化合物形成的一些大的不确定性。特别是，在澳大利亚火灾中，与火灾有关的甲酸（HCOOH）的排放量尤其不确定。大气HCOOH有助于降水酸度和化学，其来源通常不能很好地捕捉到全球模式。限制初级排放的HCOOH和调查二次形成机制将提供一个有价值的约束全球HCOOH预算以及生物质燃烧排放的最终命运。该项目将推进澳大利亚野火挥发性有机化合物排放的知识，其可变性和依赖性，以及随后的挥发性有机化合物氧化。该奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

Emission factors of long-lived volatile organic compounds from the 2019–2020 Australian wildfires during the COALA campaign

• DOI: 10.5194/acp-2021-742
• 发表时间: 2021
• 作者: Asher P. Mouat;C. Paton‐Walsh;J. B. Simmons;Jhonathan Ramirez-Gamboa;D. Griffith;J. Kaiser