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

该项目支持将于2016年7月开始在密歇根大学生物站（UMBS）进行的夏季野外活动中不可或缺的研究。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产生的预测非常重要，这些物种对维持人类健康和环境至关重要。夏季大气氧化剂测量（AMOS）项目包括研究不同氮氧化物浓度下生物源性挥发性有机化合物的氧化加工速率和氧化机制。提出的研究重点是甲醛作为挥发性有机化合物氧化的示踪剂。该项目包括利用叶片封闭研究植物的甲醛排放，测量表面和大气之间的甲醛交换通量，通过塔顶涡流相关测量甲醛通量，通过树冠梯度测量甲醛通量，以及应用1-D盒模型方法检查VOC氧化，以研究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.