Emissions and Chemistry from the Tianjin Region in China

主要研究人员计划在中国天津（北京附近）的一个特大城市环境中开展探索性研究活动。pi将关注三个主题：1)气相排放清单的准确性和完整性，重点是了解排放部门的贡献；2)区域臭氧指示物种类、挥发性有机物（VOCs）光化学处理及VOC/NOx（氮氧化物）限值相关特征分析；3)颗粒排放和老化的研究，重点是半挥发性化合物（SVOC）在气相和气相之间的分配。最终成果将是更好地了解这个特大城市区域内臭氧和气溶胶的形成和命运，并为从中国未来变化的角度看待这个特大城市的影响提供更好的基础。在为期三周的实地项目中，pi将在一个高通量塔上运行。这将涉及环境VOCs的化学形态和气溶胶的大小分布，以及NOy、CO、SO2和O3的测量和边界层激光雷达传感。这项工作将与当地天津大学的科学家以及NCAR的科学家合作进行，他们将在同一时期（2010年9月）在现场。对该地区大气化学循环的初步了解将有助于全面了解特大城市对区域和全球化学的影响，从而有利于有关全球变化的社会决策。这项工作还将通过pi的NSF REU大气化学计划和新的大气政策轨迹（APT）计划针对本科生和研究生的教育。

The principal investigators (PIs) plan to carry out an exploratory research campaign in a mega-city environment in Tianjin, China (near Beijing). The PIs will focus on three topics: 1) accuracy and completeness of the gas phase emission inventory with an emphasis upon understanding emission sector contributions; 2) analysis of ozone indicator species, photochemical processing of volative organic compounds (VOCs) and related features of VOC/NOx (nitrogen oxide) limitations in the region; and 3) investigation of particulate emissions and aging with an emphasis upon partitioning of semi-volatile compounds (SVOC) between gas and vapor phases. The end products will be a better understanding of ozone and aerosol formation and fate within this megacity region and a better basis for placing the impact of this megacity in perspective with respect to future change in China. In the three week field program, the PIs will operate from a tall flux tower. This will involve chemical speciation of ambient VOCs and size distributions of aerosols coupled with NOy, CO, SO2, and O3 measurements and boundary layer lidar sensing. This work will be carried out in collaboration with scientists from the local Tianjin University as well as with NCAR scientists, who will be at the field site during the same time period (September 2010).Gaining an initial understanding of atmospheric chemical cycles within this region will benefit overall understanding of megacity impacts on regional and global chemistry and thus benefit societal decisions regarding global change. The work will also target undergraduate and graduate student education through the PIs' NSF REU atmospheric chemistry program and a new and novel Atmospheric Policy Trajectory (APT) program.