SGER: Formaldehyde Measurements During BEARPEX (Biosphere Effects on Aerosols and Photochemistry Experiment) at Blodgett Forest 2007

本项目的目标是调查气相甲醛（HCHO）在森林环境中的夏季/秋季2007年通过最近出现的机会。 量子级联激光（QCL）吸收光谱的新技术将被应用于HCHO测量和在加州的Blodgett森林的碳氢化合物的光化学氧化的研究，作为生物圈对气溶胶和光化学实验（BEARPEX）的一部分。 如果成功的话，这项研究可能会导致对挥发性有机化合物（VOCs）的大气处理及其同时产生的HCHO的理解取得重大进展，并可能有助于验证Blodgett的松树林正在以高活性VOCs的形式排放大量有机碳的假设。 在Blodgett对甲醛收支的调查还将提供对森林中二次有机气溶胶和臭氧形成率的深入了解。这项研究将有助于实现BEARPEX的目标，并可能导致大气氧化以及二次有机气溶胶和臭氧形成的辐射和气候影响的新结果。 这项工作将主要由一名研究生进行，并将促进研究和教育的融合。

The goal of this project is to investigate gas phase formaldehyde (HCHO) in a forested environment during summer/fall 2007 through an opportunity that recently arose. The novel technique of quantum cascade laser (QCL) absorption spectroscopy will be applied to HCHO measurements and the study of photochemical oxidation of hydrocarbons in Blodgett Forest, California, as part of the Biosphere Effects on Aerosols and Photochemistry Experiment (BEARPEX). If successful, this research could lead to significant advances in understanding of the atmospheric processing of volatile organic compounds (VOCs) and their concurrent HCHO production, and could help to validate the hypothesis that the pine forest at Blodgett is emitting a large flux of organic carbon in the form of highly reactive VOCs that are oxidized within meters of the forest canopy. Investigation of the formaldehyde budget at Blodgett will also provide insight into the formation rates of secondary organic aerosols and ozone in forests. This research will help to fulfill the goals of BEARPEX, and could lead to new results on atmospheric oxidation and the radiative and climate impacts of secondary organic aerosols and ozone formation. The work will be primarily conducted by a graduate student, and will promote the integration of research and education.