Measurements of Hydroxyl (OH), Hydroperoxy (HO2), and Other Photo-Oxidants and Products During 2016 PROPHET (Program on Oxidants Photochemistry Emissions and Transport)

这个项目是夏季野外研究的一部分，目的是更好地了解森林环境中大气中的反应化学。在这个项目中，将测量与大气中小二次颗粒产生相关的关键自由基种类。提高对森林环境中反应化学的认识，将改进对森林演替和气候变化如何影响未来大气组成的预测。实地研究将于2016年夏季在密歇根大学生物站（UMBS）氧化剂：光化学、排放和运输研究项目（PROPHET）进行。实地研究的总体目标是调查目前的大气化学模型是否无法重现森林环境中观测到的自由基浓度，以便准确预测生物源性挥发性有机碳排放对臭氧、二次有机气溶胶的产生和大气与生物圈之间氮循环的影响。与了解大气氧化有关的测量物质包括羟基（OH）、氢过氧（HO2）和有机过氧（RO2）自由基；硫酸（硫酸）；有机酸;低挥发性和极低挥发性有机化合物（LVOC和ELVOC）。还将在印第安纳大学进行数周的实验室测量，以比较参与PROPHET 2016活动的仪器。

This project is part of a summer field study to gain a better understanding of reactive chemistry in the atmosphere of a forested environment. In this project, key radical species will be measured that are relevant to the production of small secondary particles in the atmosphere. Improving the understanding of reactive chemistry in forest environments will improve projections of how changes in forest succession and climate might affect the future composition of the atmosphere.The field study will take place at the University of Michigan Biological Station (UMBS) Program for Research on Oxidants: PHotochemistry, Emissions, and Transport (PROPHET) in the summer of 2016. The overarching objectives of the field study are to investigate the inability of current atmospheric chemistry models to reproduce observed radical concentrations in forest environments in order to accurately predict the impact of biogenic volatile organic carbon emissions on the production of ozone, secondary organic aerosols and the cycling of nitrogen between the atmosphere and the biosphere. Species to be measured related to understanding atmospheric oxidation include hydroxyl (OH), hydroperoxy (HO2), and organic peroxy (RO2) radicals; sulfuric acid (H2SO4); organic acids; and low-volatility and extremely low volatility organic compounds (LVOC and ELVOC). There will also be several weeks of laboratory measurements conducted at the University of Indiana to intercompare the instrumentation of those participating in the PROPHET 2016 campaign.