气候变化领域集成服务门户(CCPortal): Weekend-Weekday Implications and the Impact of Wildfire Smoke on Ozone and Its Precursors at Boulder Reservoir, Colorado Between 2017 and 2019

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DOI	10.1029/2021JD035221
	Weekend-Weekday Implications and the Impact of Wildfire Smoke on Ozone and Its Precursors at Boulder Reservoir, Colorado Between 2017 and 2019
	Pollack I.B.; Helmig D.; O'Dell K.; Fischer E.V.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	The Northern Front Range of Colorado regularly exceeds the ozone (O3) National Ambient Air Quality Standard. This region is unique because it is impacted by emissions from urban activities (i.e., traffic and light industry) as well as from oil and natural gas production. Here, we summarize three years of observations from a new O3 monitoring site at the western edge of the region, located at the Boulder Reservoir. There were 41 days at the Boulder Reservoir in 2017, 2018, and 2019 when the maximum daily 8-hour average O3 mixing ratio (MDA8 O3) exceeded 70 ppbv. Of these 41 high O3 days, 40 occurred between May and September, two were influenced by stratospheric intrusion events, one was influenced by a local industrial fire, and 13 of the days were impacted by wildfire smoke. Within the smoke-free subset of data, weekend-weekday differences in O3 versus nitrogen oxides (NOx) during 2018 and 2019 suggest NOx-limited O3 production. Enhanced nonmethane volatile organic compounds (NMVOC) to NOx ratios are also observed on weekend days and are driven by weekend reductions in NOx. An analysis of 13 NMVOCs on days that had MDA8 O3 > 70 ppb showed that NMVOC abundances and their relative source contributions are variable at this location. Finally, we compare smoke-impacted with smoke-free conditions. At a given temperature, smoke-impacted days have higher expected O3 mixing ratios than smoke free-days. On average, benzene, toluene, and hexane are also elevated during smoke-impacted periods. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Boulder Reservoir; Colorado Northern Front Range Metropolitan Area; NOx; ozone; smoke; VOC
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237030
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Boulder Air LLC, Boulder, CO, United States
推荐引用方式 GB/T 7714	Pollack I.B.,Helmig D.,O'Dell K.,et al. Weekend-Weekday Implications and the Impact of Wildfire Smoke on Ozone and Its Precursors at Boulder Reservoir, Colorado Between 2017 and 2019[J],2021,126(17).
APA	Pollack I.B.,Helmig D.,O'Dell K.,&Fischer E.V..(2021).Weekend-Weekday Implications and the Impact of Wildfire Smoke on Ozone and Its Precursors at Boulder Reservoir, Colorado Between 2017 and 2019.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Pollack I.B.,et al."Weekend-Weekday Implications and the Impact of Wildfire Smoke on Ozone and Its Precursors at Boulder Reservoir, Colorado Between 2017 and 2019".Journal of Geophysical Research: Atmospheres 126.17(2021).