Measurement of Aerosols and Trace Gases in Mexico City Outflow during Megacity Impacts on Regional and Global Environments-Mexico City Pollution Outflow Field Campaign (MIRAGE-Mex)

该项目将在“特大城市对区域和全球环境的影响”项目期间提供气溶胶和痕量气体的地面测量。这些仪器将部署在墨西哥城北部的地基超级站点。沿着其他各种配置测量（包括NSF支持的气溶胶有机成分、挥发性有机化合物和有机硝酸盐的测量），所获得的数据和所进行的建模将提供一个非常详细的关于特大城市流出区域中气体和颗粒污染物的浓度和转化的图像。将部署化学电离质谱仪（CIMS）来测量羟基自由基和过氧化物，以及硫酸。将使用一台颗粒-液体取样器（PILS）仪器对气溶胶进行快速原位化学分析，其他仪器将测量气相氮氧化物。将应用光化学箱模型来综合这些数据，该项目将为格鲁吉亚理工学院的几名研究生提供教育机会，并将与墨西哥科学家开展合作。

This project will provide ground-based measurements of aerosols and trace gases during the Megacity Impacts on Regional and Global Environments (MIRAGE/MILAGRO) project. The instruments will be deployed at the ground-based super site north of Mexico City. Along with various other collocated measurements (including NSF-supported measurements of aerosol organic composition, volatile organic compounds, and organic nitrates), the data obtained and modeling performed will provide a very detailed picture of the concentrations and transformations of gaseous and particulate pollutants in the outflow region of a Megacity.A Chemical Ionization Mass Spectrometer (CIMS) will be deployed to measure hydroxyl radical and peroxides, as well as sulfuric acid. A Particle-Into-Liquid Sampler (PILS) instrument will be used for rapid in-situ chemical analysis of aerosols, and additional instruments will measure gas-phase nitrogen oxides. Photochemical box models will be applied to synthesize these data.This project will provide educational opportunities for several graduate students at the Georgia Institute of Technology, and will also develop collaborations with Mexican scientists.