The Chemistry of Oxidation Flow Reactors (OFR) and the Sources of Semivolatile and Intermediate Volatility Secondary Organic Aerosol (SOA) Precursors in Recent NSF Field Studies

该项目将告知氧化流动反应器（OFR）在大气化学研究中的使用。 利用OFR研究大气中二次有机气溶胶（SOA）的形成。 OFR的使用的实验和模拟调查将有助于确定其代表性，以了解在大气中的化学反应，这项工作解决了两个研究问题：（1）什么是OFR化学的代表性相比，大气和大型环境室，以及如何可以优化？ (2)在生物源环境中，环境空气中OH氧化的关键SOA前体是什么？ 该项目包括建模和实验室研究，以模拟最近NSF支持的实地活动的观测测量。这项研究将提供迫切需要的信息的有用性，解释和最佳实践的OFR技术，正在迅速通过大气科学界。 这一努力也将有助于对控制SOA形成的关键前体、途径和生源-生源相互作用进行更严格的限制。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This project will inform the use of Oxidation Flow Reactors (OFR) in the study of atmospheric chemistry. OFR are used to study the formation of secondary organic aerosol (SOA) in the atmosphere. Experimental and modeling investigations of the use of the OFR will help to determine their representativeness to understanding chemical reactions in the atmosphere.This effort addresses two research questions: (1) What is the representativeness of OFR chemistry compared to the atmosphere and large environmental chambers, and how can it be optimized? (2) What are the key SOA precursors for OH oxidation of ambient air in biogenic environments? The project includes modeling and laboratory studies to simulate observational measurements from recent NSF-supported field campaigns. This research will provide critically-needed information on the usefulness, interpretation, and best practices of the OFR technique that is being adopted rapidly by the atmospheric science community. This effort also will help place firmer constraints on the key precursors, pathways and anthropogenic-biogenic interactions controlling SOA formation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.