Field, Laboratory, and Theoretical Study of Soot Aerosol

烟尘气溶胶的现场、实验室和理论研究

• 批准号: 0531926
• 负责人: Peter Buseck
• 金额: --
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0531926&HistoricalAwards=false
• 关键词: Field; Laboratory; Theoretical; Study; Soot

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.

该项目解决了大气烟尘颗粒的复杂性，这些颗粒是重要的光吸收颗粒，因此对于了解气候强迫具有重要意义。单个烟灰颗粒将通过电子断层扫描和透射电子显微镜 (TEM) 进行研究，这将提供有关颗粒的 3 维形状、表面积、体积和密度的信息。作为该项目的一部分，电子断层扫描方法将得到开发和完善，目标是获得单个气溶胶颗粒的定量 3D 测量结果。将与其他项目参与者合作，在墨西哥进行 MIRAGE（特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/或地面站点收集大气颗粒物。这项研究的目的是描述城市地区排放的污染物的化学/物理变化和最终归宿。该项目还包括在受控条件下制备的合成烟灰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。