RAPID: Formaldehyde Measurements as Tracer of Local Processing of Reactive Volatile Organic Carbon During the Atmospheric Measurements of Oxidants in Summer Study

该项目支持的研究是不可或缺的夏季实地活动，将在密歇根大学生物站（UMBS）开始于2016年7月。 实地活动的目的是更好地了解森林环境大气中的反应化学。这对于改进对大气中臭氧和二次有机气溶胶的预测是重要的，这些物种对维持人类健康和环境是重要的。夏季氧化剂的大气测量（AMOS）活动包括研究不同氮氧化物浓度下生物挥发性有机化合物的氧化处理速率和氧化机制。 拟议的研究重点是甲醛作为挥发性有机化合物氧化的示踪剂。该项目包括利用树叶围蔽研究植物的甲醛排放量，测量地表与大气之间的甲醛交换通量，通过塔顶的涡流相关测量甲醛通量，以及通过树冠层的梯度测量，和应用1-D箱模型方法来检查VOC氧化，以调查缺失的有机过氧自由基源是否与缺失的甲醛源相关。研究结果将有助于提高减轻排放对气候、人类健康和环境的人为影响的能力。

This project supports research that is integral to the summer field campaign that will take place at the University of Michigan Biological Station (UMBS) beginning in July 2016. The objective of the field campaign is to gain a better understanding of reactive chemistry in the atmosphere of a forested environment. This is important for improving predictions of the production of ozone and secondary organic aerosols in the atmosphere, species important for sustaining human health and the environment.The Atmospheric Measurements of Oxidants in Summer (AMOS) campaign includes the study of the oxidative processing rate and oxidation mechanisms of biogenic volatile organic compounds under varying nitrogen oxide concentrations. The proposed research focuses on formaldehyde as a tracer for the oxidation of volatile organic compounds. The project includes the study of formaldehyde emissions from plants using leaf enclosure, measurement of the fluxes of the formaldehyde exchange between the surface and the atmosphere, formaldehyde flux measurements via eddy correlation at the top of the tower and gradient measurements through the canopy, and application of a 1-D box model approach to examine VOC oxidation to investigate whether missing organic peroxy radical sources are correlated with missing formaldehyde sources. The results will contribute to an improved ability to mitigate the anthropogenic effects of emissions on climate, human health, and the environment.