CAREER: Spectroscopic Measurements of Secondary Organic Aerosol (SOA) Precursor Gases through Laboratory and Aircraft Studies

职业：通过实验室和飞机研究对二次有机气溶胶 (SOA) 前体气体进行光谱测量

• 批准号: 0847793
• 负责人: Rainer Volkamer
• 金额: $ 54.49万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-02-15 至 2015-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0847793&HistoricalAwards=false
• 关键词: CAREER; Spectroscopic; Measurements; Secondary; Organic

Secondary Organic Aerosol (SOA) forms in the atmosphere through chemical reactions of gaseous compounds and comprises a large fraction of the organic aerosol. Observed SOA amounts are one to two orders of magnitude larger than predicted by atmospheric models, leading to the fundamental questions: What are the sources and chemical identities of SOA precursors and how do they form SOA? These questions will be addressed through field studies with instrumentation developed by the principal investigator (PI) and laboratory experiments in simulation chambers. An Airborne Multi-Axis Differential Optical Absorption Spectrometer (AMAX-DOAS) will be built and used to measure column data for glyoxal (CHOCHO) and other gases, and to constrain their horizontal and vertical distributions in the boundary layer and the free troposphere. An LED-based Cavity Enhanced DOAS (LED-CE-DOAS) will be developed for the sensitive and selective measurement of trace gases. This instrument will be used to measure CHOCHO in laboratory experiments to explore its sources and photochemically-enhanced sink reactions, and to study SOA formation from relevant precursor volatile organic compounds (VOCs) (e.g., isoprene, acetylene, aromatic VOCs).The project's educational component will consist of enhancing the college readiness of students underrepresented in math and science-based careers. Two fluent Spanish speakers, the PI, and the director of the Science Program at Boulder High School will team up to support students underrepresented in science prior to college, when critical skills needed to succeed in graduate studies - or the lack thereof - can still be identified and corrected. Working relationships with K-12 teachers will also be established. The materials developed will be catalogued in the Digital Library for Earth Science Education (DLESE) and submitted for peer review to the DLESE Community Review System.

二次有机气溶胶（SOA）是通过气体化合物的化学反应在大气中形成的，占有机气溶胶的很大一部分。观测到的SOA数量比大气模型预测的要大一到两个数量级，这导致了一些基本问题：SOA前体的来源和化学特性是什么，它们如何形成SOA？这些问题将通过由首席研究员（PI）开发的仪器和模拟室的实验室实验进行实地研究来解决。机载多轴差分光学吸收光谱仪（AMAX-DOAS）将用于测量乙二醛（CHOCHO）和其他气体的柱数据，并约束它们在边界层和自由对流层中的水平和垂直分布。将开发一种基于led的腔增强DOAS (LED-CE-DOAS)，用于痕量气体的灵敏和选择性测量。该仪器将用于在实验室实验中测量CHOCHO，以探索其来源和光化学增强的汇反应，并研究相关前体挥发性有机化合物（如异戊二烯、乙炔、芳香族VOCs）形成SOA。该项目的教育部分将包括提高在数学和科学基础职业中代表性不足的学生的大学准备程度。两位说一口流利西班牙语的人，PI和博尔德高中的科学项目主任将联合起来，支持那些在大学之前在科学领域缺乏代表的学生，当他们在研究生学习中取得成功所需的关键技能——或者缺乏这些技能——仍然可以被识别和纠正的时候。与K-12教师的工作关系也将建立。开发的材料将被编入地球科学教育数字图书馆（DLESE），并提交给DLESE社区评审系统进行同行评审。