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

该项目涉及对微量气体和气溶胶进行量化，目的是更好地确定输送到北美西部大陆边界的气团中这些物种的来源。这项研究将开发和利用位于山顶的一个新的大气测量点。俄勒冈州中部的单身汉。2.7公里的高度可能会像其他山区站点(例如夏威夷的毛纳罗亚天文台和加那利群岛的伊扎纳大气天文台)一样，对自由对流层气团进行定期采样。在研究期间，将持续测量臭氧、一氧化碳和凝结核的浓度，以及气溶胶的光散射效率。在特定的活动期间，测量套件将得到增强，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)以及空气质量来源的示踪剂--铍-7和铅-210。将使用选定物种的基于飞机的浓度分布和基于卫星的观测，在水平和垂直范围内设置基于地面的测量。将使用全球化学品运输模式帮助制定预算并量化来自远程来源的捐款。该项目将在一个对各种目标的大气研究有用的高度建立一个新的大气观测点。在该项目中，从该站点获得的数据将有助于量化长距离输送在臭氧和细颗粒等重要对流层物种预算中的作用。该项目还将包括培训一名博士后研究员和一名本科生。社区学院的一名教职员工也将参与该项目。

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.