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办的为期两天的研讨会--《城市化学的演变：非传统排放源的日益增长的影响》。研讨会的目标是聚集专家，促进对包括烹饪、建筑废气和挥发性化学产品(VCP)在内的“非传统”人为来源的空气污染物排放的科学理解，如个人护理产品。这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种的基本了解，这些排放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，城市大气化学一直是由交通和能源生产所产生的“传统”人为挥发性有机化合物(VOCs)的排放推动的。然而，近年来，随着机动车排放的减少，其他来源的VOCs开始在城市空气污染混合中发挥重要作用。这些非传统的人为排放包括基于石油的VCP、烹饪排放和建筑排放，这些排放通常含有醇、醛、酯和酮等官能团。相比之下，传统的人为VOC排放是由烷烃、烯烃和芳香烃等物种组成的。因此，一系列不同的化学反应可能是重要的。讲习班的讨论将集中在以下领域：1)室内或水溶液中VCP转化为含氧VOC的实验室研究；2)现场工作，以确定城市大气中VCP的排放和化学转变；3)VCP排放及其化学转变影响臭氧和气溶胶浓度的模拟；以及4)开发仪器，以准确测量城市大气中发现的浓度下的这些物种及其反应产物。将制作一份综合讨论的报告，并广泛提供。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

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.