Secondary Marine Aerosol precursors and Links to aerosol growth at ice-melT onset in the Arctic (SMALTA)

次生海洋气溶胶前体以及与北极冰融化开始时气溶胶生长的联系 (SMALTA)

• 批准号: 2211153
• 负责人: Megan Willis
• 金额: $ 75.6万
• 依托单位: Colorado State University
• 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: 2022-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2211153&HistoricalAwards=false
• 关键词: Secondary; Marine; Aerosol; precursors; Links

The goal of this project is to advance knowledge about the formation of secondary marine aerosol in the atmosphere. Compared to primary marine aerosol, secondary aerosol explains a larger fraction of variability in marine cloud condensation nuclei and cloud droplet number concentrations. This work is expected to improve the predictive understanding of ocean - atmosphere interactions that control aerosol number and properties over remote oceans and will improve the mechanistic understanding of the formation of marine cloud condensation nuclei. The results will provide needed information for improved model representation of aerosol impacts on marine cloud properties and Earth’s changing climate.Measurements of volatile organic compounds will be made during the Atmospheric Rivers and the Onset of Sea Ice Melt (ARTofMELT) project aboard IB Oden, in May – June 2023. New measurements of oxygenated volatile organic compounds will allow a determination of whether oxygenated monoterpenes, linear carbonyls and phenolic compounds are important contributors to gas-phase marine reactive organic carbon in a polar marine region. In addition, new measurements of reduced sulfur compounds will allow a determination about whether methanethiol makes an important contribution to the natural sulfur budget during the Atlantic Arctic spring bloom. Finally, gas-aerosol closure simulations will quantify the role of these under-explored precursors of secondary marine aerosol in controlling aerosol properties. The observations and modeling of this project have relevance to marine regions beyond the Arctic, where (1) models of aerosol properties have relied on assumptions about the nature and identity of secondary marine aerosol precursors, and (2) efforts to reach closure between measured and predicted oxidant reactivity have indicated a missing source of reactive organic carbon.Three graduate students will participate in the internationally collaborative research. A collaboration with the Natural Sciences Education and Outreach Center at Colorado State University will involve the design of hands-on and student-driven classroom activities that focus on greenhouse gases and their impacts on both local agricultural systems, and remote ocean and polar ecosystems.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.

该项目的目的是提高有关大气中二级海洋气溶胶形成的知识。与原代海洋气溶胶相比，次生气溶胶解释了海洋云凝结核和云液滴数量浓度的变化较大的一部分。预计这项工作将改善对海洋大气相互作用的预测理解，这些相互作用控制着偏远海洋的气溶胶数量和特性，并将提高对海洋云凝结核心形成的机械理解。结果将提供所需的信息，以改善气溶胶对海洋云特性和地球气候变化的影响的模型表示。挥发性有机化合物的测量将在大气河流期间和海冰融化（Artof -Melt）的发作（Artof -Melt）项目（ARTOF -MELT）项目（ARTOF -MELT）在IB ODEN上，IB ODEN，5月2023年5月 - 2023年5月。单二烯，线性羰基和苯酚化合物是极地海洋区域中气相海洋反应性有机碳的重要因素。此外，对减少硫化合物的新测量将确定甲烷乙醇是否在大西洋北极春季开花期间对天然硫预算做出重要贡献。最后，气压封闭模拟将量化这些未经探索的二次海洋气溶胶在控制气溶胶性能中的作用。该项目的观察结果和建模与北极以外的海洋区域相关，在该区域中，气溶胶特性的模型已依赖于关于次级海洋气溶胶前体性质和认同的假设，（2）努力在测量的氧化反应性和预测的反应性之间取得了关闭的努力，这表明了无反应性的有机碳。与科罗拉多州立大学的自然科学教育和外展中心合作将涉及动手和学生驱动的课堂活动的设计，这些课堂活动的重点是温室气体及其对当地农业系统的影响，以及远程海洋和极地生态系统的影响。该奖项反映了NSF的法定任务，并通过评估了基金会的概念，并通过评估了基金会的概念，并将其视为cr cripial and Internctial and Internitial and Interviatial and Broadia and Broadia and Broadia and Broadia and broaderia and broaderia and broughia and intive and tobleit。