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

该项目的目标是通过最近出现的机会调查2007年夏秋期间森林环境中的气相甲醛(HCHO)。作为生物圈对气溶胶的影响和光化学实验(BEARPEX)的一部分，量子级联激光(QCL)吸收光谱这一新技术将被应用于加利福尼亚州布洛杰特森林地区的甲醛测量和碳氢化合物的光化学氧化研究。如果成功，这项研究可能会在了解挥发性有机化合物(VOCs)的大气处理过程及其同时产生的HCHO方面取得重大进展，并可能有助于验证布洛吉特松林正在排放大量有机碳的假设，这些有机碳以高活性VOCs的形式在森林树冠附近几米内被氧化。对Blodgett的甲醛预算的调查还将提供对森林中二次有机气溶胶和臭氧形成速度的洞察。这项研究将有助于实现BEARPEX的目标，并可能在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方面产生新的结果。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.