Collaborative Research: Aerosol Impacts on the Regional and Global Environment

该项目将在2006年墨西哥大城市对区域和全球环境的影响（MIRAGE）运动和洲际和大城市污染实验（IMPEX）期间，在NSF C-130飞机上提供气溶胶颗粒的光学和化学性质的测量。仪器套件包括冷凝核计数器（CNC），单粒子烟灰光度计（SP-2），用于确定黑碳质量，气溶胶大小和有机涂层，光声吸收和散射光谱仪（PASS），用于测量气溶胶散射和吸收，气溶胶撞击收集器，用于飞行后分析，使用傅里叶变换红外光谱（FT-IR）和电子显微镜，将提供化学信息。此外，在MIRAGE项目期间，气溶胶测量将在墨西哥城下风的地面站点进行。有关气溶胶性质的综合资料将用于观测大城市流出区气溶胶的输送和转化，以及经过远距离输送的气团。这些数据将用于验证化学输运模型。这将为污染物排放对区域和全球对流层组成的影响及其对气候的影响提供新的见解。这个项目将加强美国和墨西哥来自一些机构的科学家之间的合作，并将为一些研究生提供教育机会。

This project will provide measurements of the optical and chemical properties of aerosol particles on the NSF C-130 aircraft during the 2006 Megacities Impacts on Regional and Global Environments (MIRAGE) Campaign to be conducted in Mexico City and the Intercontinental and Megacity Pollution Experiment (IMPEX). The instrument suite includes a Condensation Nuclei Counter (CNC), a Single Particle Soot Photometer (SP-2) to determine black carbon mass, aerosol size, and organic coatings, a Photoacoustic Absorption and Scattering Spectrometer (PASS) to measure aerosol scattering and absorption, an aerosol impaction collector for post-flight analysis using Fourier-Transform Infrared Spectroscopy (FT-IR) and electron microscopy, which will provide chemical information. In addition, during the MIRAGE project, aerosol measurements will be conducted at a ground-based site downwind of Mexico City.The comprehensive data obtained on aerosol properties will be used to observe the transport and transformation of the aerosols in the outflow region of a megacity, and air masses that have undergone long-range transport across the Pacific. The data will be used to validate chemical transport models. This will provide new insights on the effect of pollutant emissions on the regional and global tropospheric composition and its effect on climate.This project will enhance collaborations between U.S. and Mexican scientists from a number of institutions, and will provide educational opportunities for several graduate students.