Instrumentation for Measuring Organic Aerosols in the Calspan Chamber

Calspan 室内有机气溶胶测量仪器

• 批准号: 9807297
• 负责人: Dean Hegg
• 金额: $ 4.22万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-15 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9807297&HistoricalAwards=false
• 关键词: Instrumentation; Measuring; Organic; Aerosols; Calspan

9807297HeggInstrumentation for Measuring Organic Aerosols in the Calspan Chamber This project supports measurements of polar organic compounds that will be studied as part of the Calspan cloud/aerosol experiment. The experiment will be conducted during November 1998, using the high-pressure Calspan chamber that is operated by the University of Rochester. The main science objective for the project is to improve understanding of the impact of organic aerosol precursors on the nucleation of new particles, particularly, internally mixed organic-inorganic particles. The instrumentation package requested by the PI is in two parts. In part one, the upgrade of the ion chromatography instrument will permit analysis of dissolved polar organic compounds such as carboxylic and dicarboxylic acids. For part two, the PI requests support to upgrade the thermal evolution apparatus developed by T. Novakov (Lawrence Berkeley Laboratory). The thermal evolution system will be used to quantify the total carbon mass present in the particle and dissolved phases. A graduate student from the University of Washington group will be trained on the thermal analysis system. Thus, the project supports instrumentation that will permit a carbon mass balance to be developed for the Calspan cloud nucleation experiments. The improved quantitative description of carbonaceous compounds in cloud-aerosol processes will provide experimental evidence that is intended to evaluate recent theoretical analyses on the impact of known organic compounds on cloud drops, and thus on climate forcing by aerosol chemical components.

卡尔斯潘实验室中的有机气溶胶测量仪器该项目支持对极性有机化合物的测量，这些有机化合物将作为卡尔斯潘云/气溶胶实验的一部分进行研究。这项实验将在1998年11月期间进行，使用的是罗切斯特大学运营的高压卡尔斯潘实验室。该项目的主要科学目标是提高对有机气溶胶前体对新颗粒，特别是内部混合的有机-无机颗粒成核的影响的了解。PI请求的工具包分为两个部分。在第一部分，离子色谱仪的升级将使分析溶解的极性有机化合物，如羧酸和二元酸成为可能。对于第二部分，PI请求支持升级由T.Novakov(劳伦斯·伯克利实验室)开发的热演化仪器。热演化系统将用于量化颗粒和溶解相中存在的总碳质量。华盛顿大学小组的一名研究生将接受热分析系统方面的培训。因此，该项目支持将允许为卡尔斯潘云成核实验开发碳质量平衡的仪器。改进的云-气溶胶过程中碳质化合物的定量描述将提供实验证据，旨在评估最近关于已知有机化合物对云滴的影响，从而对气溶胶化学成分对气候强迫的影响的理论分析。