Field, Laboratory, and Theoretical Study of Soot Aerosol

这个项目解决了大气烟尘颗粒的复杂性，这是重要的光吸收颗粒，因此对理解气候强迫非常有意义。我们将使用电子断层扫描技术和透射电子显微镜对单个煤烟颗粒进行研究，这将提供有关颗粒的三维形状、表面积、体积和密度的信息。作为该项目的一部分，将开发和改进电子断层扫描方法，目标是获得对单个气溶胶颗粒的定量三维测量。将与其他项目参与者合作，在墨西哥的Megacity(大城市对区域和全球环境的影响)实地活动期间，从研究飞机和/或地面地点收集大气颗粒。这项研究的目的是描述从城市地区输出的污染物的化学/物理变化和最终命运。该项目还包括对在受控条件下制备的合成烟尘及其在污染物或物理过程影响下的转化的实验室研究，以及辐射效应的理论计算。这项工作将有助于提高我们对气溶胶在气候和空气质量中的作用的理解，并有助于本科生、研究生和博士后的教育。

This project addresses the complexity of atmospheric soot particles which are important light-absorbing particles and therefore of great interest for understanding climate forcing. Individual soot particles will be studied by electron tomography with transmission electron microscopy (TEM), which will provide information on 3-dimensional shapes, surface areas, volumes, and densities of the particles. As part of the project, the electron tomography method will be developed and refined with the goal of obtaining quantitative 3-D measurements of individual aerosol particles. Atmospheric particles will be collected during the MIRAGE (Megacity Impacts on Regional and Global Environment) field campaign in Mexico from research aircraft and/or ground sites, in collaboration with other project participants. The goal of this research is to characterize the chemical/physical transformations and the ultimate fate of pollutants exported from urban areas. This project also includes laboratory studies of synthetic soot prepared under controlled conditions and its transformations under the influence of pollutants or physical processes, and theoretical calculations of radiative effects. This work will help improve our understanding of the role of aerosols in climate and air quality, and contribute to the education of undergraduate, graduate, and post-doctoral students.