CAREER: Laboratory and Field Measurements of Tropospheric Hydroxyl Radical (OH) and Peroxy Radical (HO2) by Laser-Induced Fluorescence

OH自由基是对流层化学和全球气候变化中最重要的物种之一。除了控制许多重要大气物种的寿命外，OH还引发一氧化碳和碳氢化合物的氧化，在氮氧化物存在的情况下，这可能导致城市，农村和偏远环境中产生臭氧。该职业发展计划的总体目标是通过实验室实验和OH和HO2的环境空气测量，为对流层快速而复杂的化学提供新的见解，并通过动手，基于项目的实验室课程将该研究领域融入课堂，用于大气化学和环境科学的本科和研究生课程。该计划包括建造一种新的激光诱导荧光仪器，能够以高灵敏度可靠地测量OH和HO2。 该仪器将在实验室中用于研究非甲烷烃氧化的化学动力学，在烟雾室实验中用于测量各种受控条件下的OH和HO2，并在环境空气中作为研究现场活动的一部分。 该职业项目的教育部分将允许学生获得和分析OH和HO2的测量值以及O3，CO和NOx的测量值。

The OH radical is one of the most important species in tropospheric chemistry and global climate change. In addition to controlling the lifetimes of many important atmospheric species, OH initiates the oxidation of carbon monoxide and hydrocarbons, which in the presence of nitrogen oxides can lead to the production of ozone in urban, rural and remote environments. The overall goal of this career development plan is to contribute new insights into the rapid and complex chemistry of the troposphere through laboratory experiments and ambient air measurements of OH and HO2, and integrate this research area into the classroom through a hands-on, project-based laboratory curriculum for undergraduate and graduate courses in atmospheric chemistry and environmental science. The plan involves the construction of a new laser-induced fluorescence instrument capable of making reliable measurements of OH and HO2 with high sensitivity. The instrument will be utilized in the laboratory to study the chemical kinetics of non-methane hydrocarbon oxidation, in smog chamber experiments to measure OH and HO2 under a variety of controlled conditions, and in ambient air as part of research field campaigns. The educational component of this CAREER project will allow students to obtain and analyze measurements of OH and HO2 in conjunction with measurements of O3, CO, and NOx.