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RUI: Brown Carbon Aerosol Production in Polluted Environments: The Effects of Oxidants, SO2, and Sunlight on Aqueous-Phase Aldehyde Reactivity

RUI：污染环境中棕碳气溶胶的产生：氧化剂、SO2 和阳光对水相醛反应性的影响

基本信息

批准号：
1523178
负责人：
David De Haan
金额：
$ 36.66万
依托单位：
University of San Diego
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-07-01 至 2019-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1523178&HistoricalAwards=false
关键词：
RUI Brown Carbon Aerosol Production

项目摘要

This Research in Undergraduate Institutions (RUI) project is investigating the formation of brown carbon in the atmosphere. The identification of important photochemical sources of brown carbon are important because light-absorbing particles in the atmosphere (black and brown carbon) are the second largest anthropogenic driver of climate change, after CO2 emissions. At least 20 diverse undergraduate students will participate in this research as part of this project, making it more likely that they will choose careers in science. The objectives of the research are: (1) to characterize aqueous-phase browning processes in droplets and in aerosol particles, with and without light and/or oxidants, (2) to measure the effect of dissolved SO2 on aldehyde partitioning and aerosol-phase products, (3) to determine the atmospheric significance of these reactions, and (4) to mentor and train a diverse cohort of undergraduate students, especially freshmen and sophomores, in atmospheric chemical research.Brown carbon formation will be quantified using cavity-attenuated phaseshift single-scattering albedo (CAPS-ssa) spectroscopy on evaporating droplets and aging aerosol particles with and without added aqueous-phase oxidants in a lab chamber, in rooftop photochemistry experiments, and at the CESAM cloud chamber at University of Paris East at Creteil.

这个本科院校研究（RUI）项目正在研究大气中棕色碳的形成。确定棕碳的重要光化学来源很重要，因为大气中的吸光颗粒（黑碳和棕碳）是继二氧化碳排放之后的第二大人为气候变化驱动因素。作为该项目的一部分，至少有20名不同的本科生将参与这项研究，使他们更有可能选择科学职业。研究的目标是：（1）在有和没有光和/或氧化剂的情况下，表征液滴和气溶胶颗粒中的水相布朗宁过程，（2）测量溶解的SO2对醛分配和气溶胶相产物的影响，（3）确定这些反应的大气意义，以及（4）指导和培训不同的本科生群体，特别是大一和大二学生，在大气化学研究。布朗碳的形成将量化使用腔衰减相移单散射散射光谱（CAPS-ssa）光谱学在实验室中，在屋顶光化学实验中，在添加和不添加水相氧化剂的情况下，以及位于克雷泰伊的巴黎东大学的CESAM云室。