Understanding Photochemistry and Export of Ozone and Its Precursors from China

该项目包括测量和建模，以提高对导致华北平原（NCP）区域臭氧形成的关键过程和大气排放的理解，以及污染从中国向外的运输及其对美国空气质量的影响。该项目包括与中国科学家和德国飞机运动（新兴亚洲）的合作，该运动将追踪该地区的污染排放。美国科学家将参加臭氧光化学和中国出口实验（OPECE），其中包括在污染严重的华北平原（NCP）地区的托基岛下风处进行现场观测。在中国的合作者将在中国的泰山和上海的一个城市站点进行测量。该项目的具体研究目标如下：(1)对新兴亚洲飞机数据集进行扩展，在托基岛、泰山和上海城市站点的出风口进行现场观测。利用原位和卫星观测评估三维建模能力；(2)利用carebeijing 2014 （Wangdu）、OPECE和emerging - asia的观测资料研究中国的自由基和臭氧光化学；(3)完善氮氧化物、芳烃等VOCs排放清单，量化关键光化学过程和前体排放对区域臭氧形成和输出的影响；(4)了解春季边界层和自由对流层的出口过程，研究影响中国春季污染出口的大尺度大气系统。

This project includes measurements and modeling to improve understanding of the key processes and atmospheric emissions that result in regional ozone formation in the North China Plain (NCP), and the transport of pollution out of China with resulting implications for air quality in the United States. The project includes a collaboration with Chinese scientists and with a German aircraft campaign (EMeRGe-Asia) that will track pollution outflow from the region.US Scientists will participate in the Ozone Photochemistry and Export from China Experiment (OPECE), that includes in-situ observations at Tuoji Island downwind from the polluted North China Plain (NCP) region. Measurements at Mount Tai in the NCP and at an urban site in Shanghai will be made by collaborators in China. The specific research objectives of the project are as follows: (1) Extend the EMeRGe-Asia aircraft dataset with in-situ observations in the outflow pathway at Tuoji Island, on Mount Tai, and at an urban site in Shanghai. Assess the 3-D modeling capability using in-situ and satellite observations; (2) Examine radical and ozone photochemistry in China using CAREBEIJNG 2014 (Wangdu), OPECE, and EMeRGe-Asia observations; (3) Improve the emission inventories of NOx, aromatics, and other VOCs, and quantify the effects of key photochemical processes and precursor emissions on regional ozone formation and export; and (4) Understand the export processes in the boundary layer and free troposphere during spring and investigate large-scale atmospheric systems affecting springtime pollution export from China.