Understanding Photochemistry and Export of Ozone and Its Precursors from China

该项目包括测量和建模，以提高对导致北中国平原区域臭氧形成的关键过程和大气排放的了解，以及中国污染的传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(Emerge-Asia)的合作，该活动将跟踪该地区的污染外流。美国科学家将参加臭氧光化学和中国输出实验，其中包括在受污染的中国平原北部地区的托集岛下风向进行现场观测。中国的合作者将在NCP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)扩展Emerge-Asia飞机数据集，在托集岛、泰山和上海的一个城市站点进行流出路径的现场观测。利用现场观测和卫星观测评估三维模拟能力；(2)利用CAREBEJNG 2014(望都)、欧佩克和Emerge-Asia观测检查中国的自由基和臭氧光化学；(3)改进NOx、芳烃和其他挥发性有机化合物的排放清单，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；以及(4)了解春季边界层和自由对流层中的输出过程，调查影响中国春季污染输出的大尺度大气系统。

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.