Influence of Free Tropospheric Ozone and Particulate Matter (PM) on Surface Air Quality across the West Coast of the United States

该项目延续了在西北太平洋高海拔地区的巴学士山天文台（MBO）对一氧化碳、臭氧、其他微量气体和气溶胶物理特性的多年观测序列。这个地点已被证明经常接收来自亚洲的自由对流层的污染物。该项目建立在先前关于亚洲和全球排放增加对本底空气质量影响的研究基础之上。这些观测结果将与卫星数据和计算机模型一起用于解决有关对流层臭氧的月度和年际变化，对流层自由臭氧对地面空气中臭氧水平的贡献，以及区域火灾，亚洲空气污染物和平流层对美国空气质量的影响等科学问题。MBO是美国西海岸唯一一个免费的大气成分对流层观测站。最近，美国国家科学院和联合国环境规划署/半球空气污染运输计划对洲际污染运输进行了几次评估，使用了该地点的观测结果。MBO的研究也一直是众多研究生和本科生研究项目的重点。该项目将支持1名新研究生和1名新博士后，他们将专注于高质量的观测，将原位观测与卫星数据相结合，并使用全球化学输运模型。

This project continues a multi-year sequence of observations of carbon monoxide, ozone, other trace gases, and aerosol physical properties at the Mt. Bachelor Observatory (MBO), a high elevation site in the Pacific Northwest. This site has been shown to frequently receive pollutants transported from Asia in the free troposphere. The project builds on previous work on the implications of increasing Asian and global emissions for background air quality. The observations will be used along with satellite data and computer modeling to address scientific questions concerning monthly and interannual variability of tropospheric ozone, the contribution of free tropospheric ozone to ozone levels in surface air, and the impacts of regional fires, Asian air pollutants and the stratosphere on U.S. air quality more generally.The MBO is the nation's only free tropospheric observatory for atmospheric composition on the West Coast. Observations from the site have been used in several recent assessments of intercontinental transport of pollution performed by the U.S. National Academy of Sciences and the UN Environmental Programs/Hemispheric Transport of Air Pollution program. Research at MBO has also been the focus of numerous graduate and undergraduate research projects. This project will support one new graduate student and one new post-doctoral fellow, who will focus on making high quality observations, integrating the in situ observations with satellite data and using global chemical transport models.