CAREER: Kinetics Studies and Ground Based Atmospheric Observations of Tropospheric Aerosol Nucleation

职业：对流层气溶胶成核的动力学研究和地面大气观测

• 批准号: 0645567
• 负责人: Shan-Hu Lee
• 金额: $ 66.03万
• 依托单位: Kent State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2012-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0645567&HistoricalAwards=false
• 关键词: CAREER; Kinetics; Studies; Ground; Based

The goal of this research is a better understanding of aerosol formation processes in the lower troposphere. Laboratory studies of aerosol nucleation by sulfuric acid in the presence of ammonia and organics will be carried out. The effect of oxygenated organics on nucleation will be investigated. Nucleation rates of gaseous sulfuric acid and organics will be determined as a function of organic functional group, carbon chain length, relative humidity, and temperature. The question of whether atmospheric nucleation takes place in the absence of sulfuric acid will be investigated. Long-term, simultaneous in-situ measurements of aerosol size distributions and sulfuric acid at Kent, OH will also be performed. The measured nucleation rates, as well as the information on how organics affect nucleation, will be useful for global models that attempt to predict aerosol and cloud abundances on regional and global scales. The education plan consists of four activities: (1) Development of an atmospheric chemistry research module (to measure solubility of atmospherically relevant organic compounds) for students at 15 Ohio universities, (2) Mentoring of underrepresented groups in science, first generation college students, and women, (3) Teaching atmospheric chemistry for high school students in Upward Bound Pre-College programs, and (4) Updating "Chemistry in the World," an undergraduate chemistry course for non-science majors including elementary and middle school education majors.

这项研究的目的是更好地了解低对流层气溶胶的形成过程。 将进行在氨和有机物存在下硫酸气溶胶成核的实验室研究。 将研究含氧有机物对成核的影响。 气态硫酸和有机物的成核速率将根据有机官能团、碳链长度、相对湿度和温度来确定。 将研究在没有硫酸的情况下大气核化是否发生的问题。 还将在俄亥俄州肯特对气溶胶粒径分布和硫酸进行长期、同时的原位测量。 测得的成核率，以及有机物如何影响成核的信息，将是有用的全球模型，试图预测区域和全球尺度上的气溶胶和云的丰度。教育计划包括四项活动：（1）开发大气化学研究单元（测量大气相关的有机化合物的溶解度），为15所俄亥俄州大学的学生，（2）指导科学中代表性不足的群体，第一代大学生和妇女，（3）在向上的大学预科课程中为高中生教授大气化学，（4）更新《世界化学》课程，为包括中小学教育专业在内的非理科专业本科生开设化学课程。