Workshop on Evolutions in Urban Chemistry: Growing Influence of Non-Traditional Emission Sources Workshop; Boulder, Colorado; Fall of 2018

该项目支持将于2018年秋季在科罗拉多州博尔德市举行的为期两天的研讨会“城市化学的演变：非传统排放源的影响日益增长”。 研讨会的目标是汇集专家，以促进对“非传统”人为来源的空气污染物排放的科学理解，包括烹饪，建筑废气和挥发性化学产品（VCP），如个人护理产品。本次研讨会将汇集专家，为未来的研究制定路线图，以促进对这些非传统来源排放的化学物质的基本理解，这些排放物如何随着时间的推移在大气中发生化学变化，以及它们对城市空气污染混合物的影响。从历史上看，城市大气化学是由交通和能源生产产生的“传统”人为挥发性有机化合物（VOC）排放驱动的。然而，近年来，随着车辆排放量的减少，其他来源的挥发性有机化合物开始在城市空气污染中发挥重要作用。这些非传统的人为排放物包括石油基VCP、烹饪排放物和建筑物废气，它们通常含有醇、醛、酯和酮等官能团。相比之下，传统的人为VOC排放由烷烃、烯烃和芳烃等物种组成。因此，一组不同的化学反应可能是重要的。讲习班的讨论将侧重于以下领域：1）在实验室或水溶液中对挥发性有机污染物中含氧挥发性有机化合物的转化进行实验室研究; 2）实地考察挥发性有机污染物在城市大气中的排放和化学转化特征; 3）模拟挥发性有机污染物的排放及其影响臭氧和气溶胶浓度的化学转化;以及4）开发仪器，以准确测量这些物质及其在城市大气中发现的浓度的反应产物。该奖项反映了NSF的法定使命，并被认为值得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来支持。

This project supports a workshop, "Evolutions in Urban Chemistry: Growing Influence of Non-Traditional Emissions Sources" to be held in Boulder, Colorado for two days in the Fall of 2018. The goal of the workshop is to bring together experts to advance scientific understanding of air pollutant emissions from "non-traditional" man-made sources including cooking, building exhaust, and volatile chemical products (VCPs), such as personal care products. This workshop will bring together experts to develop a roadmap for future research to advance the fundamental understanding of chemical species emitted from these non-traditional sources, how these emissions change chemically over time in the atmosphere, and the effects they have on the urban air pollution mixture. Historically, urban atmospheric chemistry has been driven by emissions from "traditional" anthropogenic volatile organic compounds (VOCs) resulting from transportation and energy production. However, in recent years, as emissions from vehicles have decreased, other sources of VOCs have begun to play a significant role in the urban air pollution mixture. These non-traditional anthropogenic emissions include petroleum based VCPs, cooking emissions, and building exhaust, which often contain functional groups like alcohols, aldehydes, esters, and ketones. In contrast, the traditional anthropogenic VOC emissions are composed of species such as alkanes, alkenes, and aromatics. As a result, a different set of chemical reactions may be important. Workshop discussions will focus on the following areas: 1) laboratory studies of the transformations of oxygenated VOCs from VCPs either in chambers or aqueous solution; 2) field work to characterize emissions and chemical transitions of VCPs in the urban atmosphere; 3) modeling of VCP emissions and their chemical transformations impacting ozone and aerosol concentrations; and 4) development of instrumentation to accurately measure these species and their reaction products at concentrations found in the urban atmosphere. A report synthesizing the discussion will be produced and available broadly.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.