Collaborative Research: Comprehensive Characterization of Atmospheric Organic Carbon over Multiple Generations of Oxidation

该项目支持对大气中有机碳化学演化的实验室研究。研究正在进行中，以调查有机化合物在经历多代大气老化时关键性质是如何变化的。这一努力将为碳在物种间的分布以及大气中有机气溶胶的形成提供重要的洞察。这项研究将有助于改进目前的空气质量和气候变化模型。该项目的具体科学目标如下：(1)开发实验室方法和能力，利用一系列形态和集合技术，对实验室老化环境中的所有碳进行化学表征；以及(2)将这些方法应用于关键的大气老化系统，以便跟踪气相和颗粒相中有机碳的演变。近年来在大气有机物种表征方面的进展，包括传统上难以测量的物种，如多官能团氧化挥发性有机化合物(OVOCs)和半挥发性和中挥发性有机化合物(S/IVOCs)，使碳闭合研究首次在实验室进行。

This project supports laboratory studies of the chemical evolution of organic carbon in the atmosphere. Research is ongoing to investigate how key properties of organic compounds change as they undergo multiple generations of atmospheric aging. This effort will provide significant insight into the distribution of carbon across species and into the formation of organic aerosol in the atmosphere. This research will help improve current models of air quality and climate change.The specific scientific objectives of this project are as follows: (1) The development of laboratory approaches and capabilities for chemically characterizing all carbon within a laboratory aging context, using a range of speciated and ensemble techniques; and (2) Application of these approaches to key atmospheric aging systems in order to track the evolution of organic carbon within both the gas and particle phases. Recent advances in the characterization of atmospheric organic species, including traditionally difficult-to-measure species such as multifunctional oxidized VOCs (OVOCs) and semivolatile and intermediate-volatility organic compounds (S/IVOCs), enable carbon closure studies to be carried out in the laboratory for the first time.