Collaborative Research: Photochemical Production of Radical Oxidants and Hydroperoxides from Organic Matter and Nitrate in Sea-Salt Aerosols

合作研究：利用海盐气溶胶中的有机物和硝酸盐光化学生产自由基氧化剂和氢过氧化物

• 批准号: 0343199
• 负责人: David Kieber
• 金额: --
• 依托单位: SUNY College of Environmental Science and Forestry
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-04-15 至 2009-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0343199&HistoricalAwards=false
• 关键词: Collaborative; Research; Photochemical; Production; Radical

This collaborative award involves the systematic study and assessment of the importance of hydroxyl radical and hydrogen peroxide production in the interaction of sunlight with aerosols that are found in the marine boundary layer. It is recognized that the breakdown of nitrate ions and organic compounds, commonly found in these particles, by solar radiation leads to the production of oxidized compounds, but this recognition is not accompanied by quantitative understanding. This study will deploy an apparatus to make fresh marine aerosols that will be carefully characterized and exposed to sunlight. Controlling variables such as acidity, temperature, and aerosol amount will be changed systematically to help quantify and test possible mechanisms of the production of these secondary oxidized species. Then similar experiments will be performed with ambient aerosols, which will be somewhat more complicated because they will likely have undergone some transformations during their time in the atmosphere. The results of this study will be incorporated into a model designed to quantify aerosols and gas phase chemical processes in the troposphere in order to assess the importance of these processes.During the course of this research a post-doctoral fellow as well as graduate and undergraduate students will participate. This work contributes to the goals and activities of a number of national and international programs including the Surface Ocean - Lower Atmosphere Study (SOLAS), International Global Atmospheric Chemistry (IGAC) and National Aerosol-Climate Interactions Program (NACIP).

该协作奖项涉及对阳光与海洋边界层中发现的气溶胶相互作用的系统研究和评估。 人们认识到，在这些颗粒中通常发现的硝酸离子和有机化合物的分解是太阳辐射会导致产生氧化化合物的产生，但是这种识别并不伴随定量理解。 这项研究将部署一种设备来制作新鲜的海洋气溶胶，以仔细表征并暴露于阳光下。 控制变量（例如酸度，温度和气溶胶量）将系统地更改，以帮助量化和测试这些二次氧化物种的生产的可能机制。 然后，将使用环境气溶胶进行类似的实验，这会更加复杂，因为它们在大气中可能会经历一些转变。 这项研究的结果将纳入旨在量化对流层中气溶胶和气相化学过程的模型，以评估这些过程的重要性。在这项研究的过程中，博士后研究员以及研究生和本科生将参与。 这项工作为许多国家和国际计划的目标和活动做出了贡献，包括《地面海洋 - 低气氛研究》（Solas），国际全球大气化学（IGAC）和国家气溶胶气候互动计划（NACIP）。