DOI: 10.1002/2017JD027917
Scopus记录号: 2-s2.0-85043463774
论文题名: The Wintertime Covariation of CO2 and Criteria Pollutants in an Urban Valley of the Western United States
作者: Bares R. ; Lin J.C. ; Hoch S.W. ; Baasandorj M. ; Mendoza D.L. ; Fasoli B. ; Mitchell L. ; Catharine D. ; Stephens B.B.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 5 起始页码: 2684
结束页码: 2703
语种: 英语
英文关键词: CO
; CO2
; NAAQS
; NOx
; PCAP
; PM2.5
英文摘要: Numerous mountain valleys experience wintertime particulate pollution events, when persistent cold air pools (PCAPs) develop and inhibit atmospheric mixing, leading to the accumulation of pollutants. Here we examine the relationships between trace gases and criteria pollutants during winter in Utah's Salt Lake Valley, in an effort to better understand the roles of transport versus chemical processes during differing meteorological conditions as well as insights into how targeted reductions in greenhouse gases will impact local air quality in varying meteorological conditions. CO2 is a chemically inert gas that is coemitted during fossil fuel combustion with pollutants. Many of these coemitted pollutants are precursors that react chemically to form secondary particulate matter. Thus, CO2 can serve as a stable tracer and potentially help distinguish transport versus chemical influences on pollutants. During the winter of 2015–2016, we isolated enhancements in CO2 over baseline levels due to urban emissions (“CO2ex”). CO2ex was paired with similar excesses in other pollutant concentrations. These relationships were examined during different wintertime conditions and stages of pollution episodes: (a) Non-PCAP, (b) beginning, and (c) latter stages of an episode. We found that CO2ex is a good indicator of the presence of gaseous criteria pollutants and a reasonable indicator of PM2.5. Additionally, the relationships between CO2ex and criteria pollutants differ during different phases of PCAP events which provide insight into meteorological and transport processes. Lastly, we found a slight overestimation of CO:CO2 emission ratios and a considerable overestimation of NOx:CO2 by existing inventories for the Salt Lake Valley. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114267
Appears in Collections: 气候减缓与适应
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作者单位: Department Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States; Utah Atmospheric Trace Gas and Air Quality Lab, University of Utah, Salt Lake City, UT, United States; Division of Air Quality, Utah Department of Environmental Quality, Salt Lake City, UT, United States; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Bares R.,Lin J.C.,Hoch S.W.,et al. The Wintertime Covariation of CO2 and Criteria Pollutants in an Urban Valley of the Western United States[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(5)