Aqueous-Phase Chemistry of In-Cloud Secondary Organic Aerosol Formation

云中二次有机气溶胶形成的水相化学

• 批准号: 0630298
• 负责人: Barbara Turpin
• 金额: $ 43.21万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0630298&HistoricalAwards=false
• 关键词: Aqueous; Phase; Chemistry; Cloud; Secondary

This project focuses on secondary organic aerosol (SOA) formation by reactions of organic precursors (including glyoxal, methylglyoxal, and acetic acid) in the aqueous phase. The central hypothesis is that cloud processing of small organics is a substantial source of SOA in the atmosphere. The PIs will 1) conduct aqueous phase photochemical batch reactions to investigate the products, pathways and kinetics of key aqueous-phase reactions likely to produce SOA, 2) evaporate droplets of reaction solutions over the course of timed experiments to provide data on SOA yields, 3) incorporate the results into an in-cloud chemical model, and 4) provide an improved estimate of the global contribution of SOA formed through cloud processing. The resulting chemical model will be available to others for incorporation into global or regional models designed to study climate change, visibility, and regional air quality.The broader impacts of this work include a "faculty internship opportunity" for a postdoctoral researcher, support and mentoring for a graduate student, and an introduction to research for a minority undergraduate student. This work will also make publicly available an in-cloud "chemical module" for use by modelers. Ultimately, this work will aid air quality management, both globally and regionally.

本计画主要研究有机前驱物（包括乙二醛、丙酮醛及乙酸）在水相中反应所形成的二次有机气溶胶。 中心假设是云处理的小有机物是一个重要的来源SOA在大气中。 PI将1）进行水相光化学分批反应，以研究可能产生SOA的关键水相反应的产物，途径和动力学，2）在定时实验过程中蒸发反应溶液的液滴，以提供SOA产率的数据，3）将结果纳入云中化学模型，以及4）提供对通过云处理形成的SOA的全球贡献的改进的估计。 由此产生的化学模型将提供给其他人，用于纳入全球或区域模型，旨在研究气候变化，能见度和区域空气质量。这项工作的更广泛的影响包括博士后研究人员的“教师实习机会”，对研究生的支持和指导，以及对少数民族本科生的研究介绍。 这项工作还将公开提供一个云中的“化学模块”，供建模人员使用。 最终，这项工作将有助于全球和区域的空气质量管理。