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、有毒物质和营养物质的沉积有重要影响。这个CAREER项目的研究目标解决了需要更好地了解气溶胶过程，化学和微观物理。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量化程序，将更好地表征和量化有机气溶胶成分。该方法将被系统地应用于世界范围内许多团体获得的AMS测量结果，并将分析所观测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多仪器数据综合分析软件系统，将获得更完整的气溶胶特性表征。此外，还将尝试从气溶胶特性（“闭合”）预测云凝结核（CCN），方法是：用CCN测量结果增强正在进行的实地活动;使用修正的科勒理论和测量结果预测CCN，并系统地分析预测和测量CCN之间达到的闭合程度。该项目将利用其他项目的资源，支持基本的现场测量和分析，并允许PI执行CCN测量和比单个现场活动可获得的有限资源更深层次的分析。这一科学计划的更广泛影响在于提供有机气溶胶和亚微米气溶胶气候效应方面急需的信息，这些信息可以为科学评估提供信息，并通过它们为政策决策提供信息;改进AMS及其有机数据的表征，这将使目前使用它的许多其他研究小组受益。通过参加教学培训方案向K-12教师推广;少数民族大学生参加研究;开发交互式大学生环境化学课程;开发大气化学课程的实验部分;研究生培训，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.