The Nature and Evolution of Brown Carbon Optical Properties in Atmospheric Aerosols

大气气溶胶中棕碳光学性质的性质和演变

• 批准号: 1241621
• 负责人: Geoffrey Smith
• 金额: $ 31.56万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1241621&HistoricalAwards=false
• 关键词: Nature; Evolution; Brown; Carbon; Optical

Through this project, a novel photoacoustic spectroscopy (PAS) instrument will be developed to measure aerosol absorption throughout the UV-visible range of the spectrum. In addition, the role of charge-transfer complexes in the absorption of UV-visible light by ambient aerosols will be investigated, as will the hypothesis that this factor may be subject to change upon oxidation by O3 and OH radicals.This research will provide insight into the nature of brown carbon in ambient aerosol and investigate how it may evolve through oxidation and aging. The project will also improve the state-of-the-art for determining aerosol optical properties, and for understanding the impact of carbonaceous aerosols on climate change and air quality.

通过该项目，将开发一种新型的光声光谱（PAS）仪器，以测量整个光谱的紫外可见光范围内的气溶胶吸收。此外，电荷转移复合物的紫外可见光的吸收环境气溶胶中的作用将被调查，将假设这一因素可能会受到O3和OH自由基氧化后的变化，这项研究将提供洞察棕色碳在环境气溶胶的性质，并调查它如何可能通过氧化和老化演变。该项目还将提高确定气溶胶光学特性的最新技术水平，并了解碳质气溶胶对气候变化和空气质量的影响。

项目成果

Spectroscopic comparison of water- and methanol-soluble brown carbon particulate matter

• DOI: 10.1080/02786826.2017.1334109
• 发表时间: 2017-01-01
• 期刊: AEROSOL SCIENCE AND TECHNOLOGY
• 影响因子: 5.2
• 作者: Phillips, Sabrina M.;Smith, Geoffrey D.
• 通讯作者: Smith, Geoffrey D.