CAREER: Aerosol Properties and Effects through Organic Aerosol Characterization, Integrated Analysis of Multi-Instrument Data, and Aerosol-Cloud Nucleation Closure

气溶胶对气候、能见度、人类健康以及酸性、毒性和营养物沉积有重要影响。这个CAREER项目的研究目标是解决更好地理解气溶胶过程、化学和微物理学的需要。通过进一步发展PI小组最近开发的用于分析Aerodyne气溶胶质谱仪（AMS）数据的有机气溶胶分离和定量程序，有机气溶胶成分将得到更好的表征和量化。该方法将系统地应用于许多小组获得的全球AMS测量结果，并分析所观察到的有机气溶胶的类型和来源。此外，通过进一步扩展最近开发的用于多仪器数据综合分析的软件系统，将获得更完整的气溶胶特性表征。此外，将尝试通过气溶胶特性（“封闭”）来预测云凝结核（CCN），增加正在进行的CCN测量的现场活动；利用修正的Kohler理论和实测结果对CCN进行预测，并系统分析预测CCN与实测CCN的接近程度。该项目将利用其他项目的资源，这些资源将支持基本的现场测量和分析，并允许PI执行CCN测量和更深入的分析，而不是单个现场战役的有限资源。这项科学计划的更广泛影响在于提供有关有机气溶胶和亚微米气溶胶气候效应的急需信息，这些信息可以为科学评估提供信息，并通过它们来制定政策；改进AMS及其有机数据的特性，这将使目前使用它的许多其他研究小组受益。这个职业计划的教育目标是：通过参与教学培训计划，扩大K-12教师的范围；少数民族本科生的科研参与互动式本科环境化学课程的开发大气化学课程实验部分的开发研究生在研究方面的培训，并有机会指导和参与实地考察、国际和工业活动。

Aerosols have important effects on climate, visibility, human health, and acid, toxic, and nutrient deposition. The research objectives of this CAREER project address the need for a better understanding of aerosol processes, chemistry, and microphysics. The organic aerosol component will be better characterized and quantified by further developing the organic aerosol separation and quantification procedure recently developed by the PI's group for analyzing Aerodyne Aerosol Mass Spectrometer (AMS) data. This method will be systematically applied to worldwide AMS measurements obtained by many groups, and the types and origins of organic aerosols observed will be analyzed. In addition, a more complete characterization of the aerosol properties will be obtained by further extending a recently developed software system for integrated analysis of multi-instrument data. Furthermore, prediction of cloud condensation nuclei (CCN) from the aerosol properties ("closure") will be attempted by augmenting ongoing field campaigns with CCN measurements; using modified Kohler theories and measurement results to predict CCN, and systematically analyzing the degree of closure achieved between predicted and measured CCN. This project will leverage resources from other programs that will support the basic field measurements and analysis, and allow the PI to perform CCN measurements and a much deeper level of analysis than possible with the limited resources obtainable for individual field campaigns. The broader impacts of this scientific program lie in furnishing critically needed information on organic aerosols and submicron aerosol climatic effects that can inform scientific assessments and, through them, policy decisions; and an improved characterization of the AMS and its organic data, which will benefit the many other research groups currently using it.The education objectives of this CAREER program are: outreach to K-12 teachers by participation in a teaching training program; participation of minority undergraduate students in research; development of an interactive undergraduate environmental chemistry course; development of an experimental component for an atmospheric chemistry course; graduate student training in research with opportunities for mentoring and involvement in fieldwork, international, and industrial activities.