CAREER: Quantifying the Formation and Persistence of Brown Carbon Compounds Through Observational and Laboratory Studies

职业：通过观察和实验室研究量化棕碳化合物的形成和持久性

• 批准号: 1555003
• 负责人: Lelia Hawkins
• 金额: $ 63.61万
• 依托单位: Harvey Mudd College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1555003&HistoricalAwards=false
• 关键词: CAREER; Quantifying; Formation; Persistence; Brown

This CAREER project is focused on characterizing the formation and fate of brown carbon in the atmosphere. Ambient measurements of brown carbon will be made in Los Angeles CA over several years and laboratory studies will be conducted to better understand the fate of brown carbon in fog and clouds. The project is expected to add important insights into the sources, fate, and impact of brown carbon in the urban environment. Such knowledge could help reduce uncertainty in regards to the contribution of atmospheric aerosol to climate forcing. The objectives of the research are to (1) Determine the contribution of nitro-aromatics to ambient Los Angeles particulate brown carbon (BrC) over hourly, daily, and yearly time scales, and (2) Determine how aerosol aging during fog/cloud processing impacts aqueous secondary BrC optical and chemical properties. This project also presents a unique opportunity to engage undergraduates in timely atmospheric research with cutting-edge instrumentation.

这个职业项目的重点是表征大气中棕色碳的形成和命运。未来几年将在加利福尼亚州洛杉矶对棕色碳进行环境测量，并将进行实验室研究，以更好地了解棕色碳在雾和云中的命运。该项目预计将增加对城市环境中棕色碳的来源，命运和影响的重要见解。这种知识有助于减少大气气溶胶对气候强迫作用的不确定性。研究的目的是（1）确定硝基芳烃的贡献，以环境洛杉矶颗粒棕色碳（BrC）超过每小时，每天和每年的时间尺度，和（2）确定如何在雾/云处理气溶胶老化影响含水二次BrC的光学和化学性质。 该项目还提供了一个独特的机会，让本科生及时参与使用尖端仪器的大气研究。