Evolution in Secondary Organic Aerosol Formation in Urban Atmosphere

城市大气中二次有机气溶胶形成的演变

• 批准号: 2206655
• 负责人: Joost de Gouw
• 金额: $ 94.13万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-15 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2206655&HistoricalAwards=false
• 关键词: Evolution; Secondary; Organic; Aerosol; Formation

This project is focused on an investigation of the atmospheric chemistry processes that lead to the formation of secondary organic aerosol (SOA) in the urban atmosphere. The research will address the key precursors or gases that lead to the formation of SOA and their sources and volatility ranges. The information developed will help to predict the evolution of urban SOA that leads to air pollution and the design of effective mitigation strategies.The science questions that will be addressed are: (1) What are the most important SOA precursors in urban air? (2) What are the sources of the most important SOA precursors? (3) What are the SOA formation pathways for the most important precursors? (4) Has SOA chemistry changed over the past decade? and (5) Can the description of urban SOA in chemistry-transport models be improved?A 6-week field campaign will be conducted in the Los Angeles area in Summer 2022. Comparison of the data with previous studies, including the CalNex study in 2010, will show how the SOA precursors and chemistry have evolved over the last decade. The project includes training for several graduate and undergraduate students.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.

该项目的重点是调查导致城市大气中二次有机气溶胶（SOA）形成的大气化学过程。该研究将探讨导致 SOA 形成的关键前体或气体及其来源和挥发性范围。所开发的信息将有助于预测导致空气污染的城市 SOA 的演变，并有助于设计有效的缓解策略。将要解决的科学问题是：（1）城市空气中最重要的 SOA 前兆是什么？ (2) 最重要的 SOA 先驱的来源是什么？ (3) 最重要的前体的 SOA 形成途径是什么？ (4) SOA 的化学性质在过去十年中发生了变化吗？ (5) 化学-交通模型中对城市 SOA 的描述是否可以改进？将于 2022 年夏季在洛杉矶地区进行为期 6 周的实地考察。将数据与之前的研究（包括 2010 年 CalNex 研究）进行比较，将展示 SOA 的前身和化学在过去十年中如何发展。该项目包括对多名研究生和本科生的培训。该奖项反映了 NSF 的法定使命，并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，被认为值得支持。