Influence of Global Sources on Free Tropospheric Ozone and Aerosols in the Western United States

该项目涉及微量气体和气溶胶的量化，目的是更好地确定输送到北美西部大陆边界的气团中所含这些物质的来源。 这项研究将开发和利用一个新的大气测量点的山顶。俄勒冈州中部的单身汉。 2.7公里的海拔高度很可能像其他山区站点（例如，夏威夷的莫纳罗亚天文台和加那利群岛的Izana大气观测台）一样，能够对自由对流层空气质量进行定期采样。 这将有助于评估排放物远距离传输对臭氧和细颗粒物区域收支的贡献，在研究期间，将对臭氧、一氧化碳和凝结核浓度以及气溶胶光散射效率进行连续测量。 在特定的活动期间，将加强测量套件，以包括活性氮化合物（一氧化氮、二氧化氮）、过氧乙酰硝酸盐（PAN）和气团来源示踪剂铍-7和铅-210。 将使用飞机上选定物种的浓度分布图和卫星观测数据，确定水平和垂直范围内的地面测量值。 将使用一个全球化学品迁移模型来帮助确定预算和量化远程来源的贡献，该项目将在一个有助于大气研究的高度建立一个新的大气观测站，以实现各种目标。 在该项目中，从该站点获得的数据将有助于量化远距离传输对重要对流层物种（如臭氧和细颗粒物）预算的作用。 该项目还将培训一名博士后研究员和一名本科生。 社区学院的一名教员也将参与该项目。

This project involves quantification of trace gases and aerosols with the goal to better define sources of these species contained in air masses transported to the western continental boundary of North America. The study will develop and make use of a new atmospheric measurement site on the summit of Mt. Bachelor in central Oregon. The 2.7 km altitude will likely enable regular sampling of free tropospheric air masses much as other mountain sites (for example, Mauna Loa Observatory, Hawaii, and Izana Atmospheric Observatory, Canary Islands). This will allow assessment of the contributions of long range transport of emissions to the regional budgets of ozone and fine particles.During the study period, continuous measurements of ozone, carbon monoxide, and condensation nuclei concentrations, as well as aerosol light scattering efficiencies, will be made. During specific campaign periods, the measurement suite will be enhanced to include reactive nitrogen compounds (nitric oxide, nitrogen dioxide), peroxyacetyl nitrate (PAN), and the tracers of air mass origin, beryllium-7 and lead-210. Aircraft based concentration profiles of selected species and satellite based observations will be used to set the surface based measurements in horizontal and vertical context. A global chemical transport model will be used to help establish budgets and quantify the contributions from remote sources.This project will establish a new atmospheric observing site at an altitude useful for atmospheric studies with a variety of goals. In this project, the data derived from the site will be useful for quantifying the role of long range transport on budgets of important tropospheric species such as ozone and fine particles. The project will also involve training of a post-doctoral research fellow and an undergraduate student. A community college faculty member will also be involved in the project.