Collaborative Research: Ionic Solutions and the Partitioning of Oxygenated Organic Compounds in the Troposphere

该项目包括实验室实验和实地测量，以帮助定量了解盐和pH值对气溶胶和气相之间大气有机物分配的影响。该项目的目标是发展适合在大气模式中实施的参数化，以改进对大气颗粒物负担的预测，以及与空气质量、直接和间接辐射强迫以及活性碳沉积有关的后续影响。拟开展的研究将解决以下问题：(1)不同环境下大气有机气体的分配如何随盐组成、浓度和液滴pH值的变化而变化？(2)气-水分配的变化如何改变大气中活性碳化合物的预算和寿命？这项工作将通过在美国潮湿和干旱地区部署雾室来系统地研究无机盐对不同环境中环境水溶性有机气体分配的影响，从而促进对基础化学的理解。该项目采用了一种创造性的方法，通过艺术系学生的参与来交流科学发现，他们将为科学界以外的人设计有关空气质量和气候变化的深刻内容。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This project includes laboratory experiments and field measurements to help build a quantitative understanding of influence of salts and pH on the partitioning of atmospheric organics between the aerosol and gas phase. The goal of the project is to develop parameterizations suitable for implementation in atmospheric models to improve the prediction of the atmospheric particulate matter burden, and subsequent impacts related to air quality, direct and indirect radiative forcing and the deposition of reactive carbon. The proposed research will address the following questions: (1) How does partitioning of atmospheric organic gases change as a function of salt composition, concentration and droplet pH in different environments? and (2) How do changes in gas-to-water partitioning alter the budget and lifetime of reactive carbon compounds in the atmosphere? This effort will advance the understanding of fundamental chemistry through the deployment of mist chambers to humid and arid regions of the U.S. to systematically study inorganic salt influences on the partitioning of ambient water-soluble organic gases in contrasting environments. The project incorporates a creative method for communicating scientific findings through the participation of art students, who will design insightful content about air quality and climate change for those outside the scientific community.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.