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.

该项目解决了大气煤烟颗粒的复杂性，这些颗粒是重要的光吸收颗粒，因此对理解气候强迫具有极大的兴趣。将通过电子断层扫描和透射电子显微镜（TEM）研究单个烟灰颗粒，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，将开发和改进电子层析成像方法，以获得单个气溶胶颗粒的定量三维测量结果。将与其他项目参与方合作，在墨西哥开展的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。这项研究的目标是表征化学/物理转化和从城市地区输出的污染物的最终命运。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进行实验室研究，以及对辐射效应进行理论计算。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。