Establishing the Linkages between Particle Physical, Chemical, and Optical Properties at the Kosan Supersite during Aerosol Characterization Experiment (ACE)-Asia

在亚洲气溶胶表征实验 (ACE) 期间建立 Kosan 超级站点颗粒物理、化学和光学特性之间的联系

• 批准号: 0333817
• 负责人: Fredrick Brechtel
• 金额: $ 18.62万
• 依托单位: Brechtel Manufacturing Incorporated
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0333817&HistoricalAwards=false
• 关键词: Establishing; Linkages; between; Particle; Physical

The goal of this project is to determine the influence of aerosol hygroscopic growth on the optical properties of ambient aerosols during dust and pollution input periods of the Aerosol Characterization Experiment (ACE) Asia at the Kosan Supersite on Cheju Island, Korea. Of special interest is whether the hygroscopic and optical properties of dust are significantly altered during periods when the dust has experienced anthropogenic influence. This work will take advantage of the very comprehensive data set that was collected on aerosol chemical, physical, and optical properties and related parameters. Thermodynamic models that predict water uptake by ambient aerosols will be extended to include complex mixtures of inorganic and organic compounds as well as Asian dust. Results from this work will reveal how particle size, concentration, and chemical composition impact the ambient light extinction coefficient, single-scatter albedo, phase function, and Angstrom exponent, as well as the wavelength dependencies of these parameters. Closure calculations will test our understanding of these relationships and provide information on the quality of available measurement techniques and models and point to the most urgently needed improvements in the future. In collaboration with Prof. John Seinfeld at CalTech, a graduate student will be involved in this project.

本项目的目标是确定气溶胶吸湿增长对环境气溶胶的光学特性的影响，在尘埃和污染输入期间的气溶胶表征实验（ACE）亚洲在高山Supersite济州岛，韩国。特别令人感兴趣的是，当灰尘经历了人为影响的时期，灰尘的吸湿性和光学特性是否发生了显着变化。这项工作将利用收集的关于气溶胶化学、物理和光学特性及相关参数的非常全面的数据集。预测环境气溶胶吸水的热力学模型将扩展到包括无机和有机化合物以及亚洲尘埃的复杂混合物。这项工作的结果将揭示颗粒尺寸，浓度和化学成分如何影响环境光消光系数，单散射散射系数，相函数和埃指数，以及这些参数的波长依赖性。闭合计算将测试我们对这些关系的理解，并提供有关现有测量技术和模型质量的信息，并指出未来最迫切需要的改进。与加州理工学院的John Seinfeld教授合作，一名研究生将参与该项目。