Understanding the Influence of Global Air Pollution on U.S. Air Quality Through Observations at the Mt. Bachelor Observatory

主要研究员（PI）和同事将在Mt.进行一氧化碳（CO），臭氧（O3），氮氧化物（NOx），总活性氮（NOy），过氧乙酰硝酸盐（PAN）和气溶胶物理特性的多年观测序列。学士天文台，位于太平洋西北部的高海拔地区。 该站点已被证明经常接收来自亚洲的自由对流层的污染物。 该项目以先前关于亚洲和全球排放量增加对本底空气质量的影响的工作为基础。 这些观测结果将用于解决有关亚洲污染物对美国空气质量影响的新科学问题。 一个令人担忧的问题是：不断变化的亚洲排放和全球生物质燃烧排放如何影响美国的空气质量？ 一个主要的假设是，PAN是亚洲氮氧化物排放量（来自所有来源）变化的一个关键指标，PAN的年际变化将与对流层臭氧的年际变化相关，如现场和卫星仪器所观察到的。更广泛的影响来自亚洲的排放影响了美国的空气质量。 该项目将为空气质量监管机构提供有关非本地来源影响的科学信息。 此外，该项目将允许山。天文台继续发展为国家资源，使其提供给其他研究人员。 一些研究生也将在实验过程中获得研究经验和培训。

The Principal Investigator (PI) and colleagues will carry out a multi-year sequence of observations of carbon monoxide (CO), ozone (O3), nitrogen oxides (NOx), total reactive nitrogen (NOy), peroxyacetyl nitrate (PAN) and aerosol physical properties at the Mt. Bachelor Observatory, a high elevation site in the Pacific Northwest. This site has been shown to frequently receive pollutants transported from Asia in the free troposphere. This project builds on previous work on the implications of increasing Asian and global emissions for background air quality. The observations will be used to address new scientific questions concerning the implications of Asian pollutants on U.S. air quality. The over-arching question is: How do changing Asian emissions and global biomass burning emissions influence air quality in the U.S? A major hypothesis is that PAN is a key indicator of changing Asian NOx emissions (from all sources) and that interannual variations in PAN will correlate with interannual variations in tropospheric ozone, as observed by both in-situ and satellite instruments. Broader impacts stem from the fact that Asian emissions affect air quality in the United States. This project will provide scientific information to air quality regulators on influences from non-local sources. In addition, the project will allow the Mt. Bachelor Observatory to continue to develop as a national resource by making it available to other researchers. Several graduate students will also receive research experience and training over the course of the experiments.