globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50423
论文题名:
Photochemical aging of volatile organic compounds in the Los Angeles basin: Weekday-weekend effect
作者: Warneke C.; De Gouw J.A.; Edwards P.M.; Holloway J.S.; Gilman J.B.; Kuster W.C.; Graus M.; Atlas E.; Blake D.; Gentner D.R.; Goldstein A.H.; Harley R.A.; Alvarez S.; Rappenglueck B.; Trainer M.; Parrish D.D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:10
起始页码: 5018
结束页码: 5028
语种: 英语
英文关键词: Faster photochemistry in weekends ; Spatial and temporal photochemical processing in Los Angeles ; VOC weekday-weekend effect
Scopus关键词: Air quality ; Benzene ; Chemical reactions ; Climate change ; Free radicals ; Research aircraft ; Enhancement ratios ; Faster photochemistry in weekends ; Los angeles ; Los Angeles Basin ; Master chemical mechanism ; Measurements of ; Photochemical processing ; Short-lived species ; Volatile organic compounds ; aging ; air quality ; benzene ; mixing ratio ; ozone ; photochemistry ; traffic emission ; volatile organic compound ; California ; Los Angeles Basin ; Pasadena ; United States
英文摘要: During the CalNex (California Research at the Nexus of Air Quality and Climate Change) field study in May-June 2010, measurements of volatile organic compounds (VOCs) were performed in the Los Angeles (LA) basin onboard a NOAA research aircraft and at a ground site located in Pasadena. A weekday-weekend effect in ozone, caused by lower NOx emissions due to reduced diesel truck traffic in the weekends, has been previously observed in Los Angeles and other cities. Measurements in the Caldecott tunnel show that emission ratios of VOCs do not vary with the day of the week, but measurements during CalNex2010 show a VOC weekday-weekend effect through faster photochemical processing at lower ambient NOx mixing ratios. Ambient VOC enhancement ratios of long-lived species such as benzene are the same between weekdays and weekends, whereas enhancement ratios of short-lived species, such as trimethyl benzene, are up to a factor of three lower on weekends. Based upon the observed differences in VOC enhancement ratios to CO, we determine that photochemical processing was on average 65%-75% faster on weekends during CalNex2010, which indicates that ambient OH radical concentrations were larger by this factor causing the observed change in VOC composition. A box model calculation based on the Master Chemical Mechanism was used to verify the increase in photochemical processing in the weekends. Key PointsSpatial and temporal photochemical processing in Los AngelesVOC weekday-weekend effectFaster photochemistry in weekends ©2013. 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/63788
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Chemical Sciences Division, NOAA/ESRL, 325 Broadway R/CSD7, Boulder, CO 80305, United States; Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder CO, United States; Marine and Atmospheric Chemistry, RSMAS/University of Miami, Miami FL, United States; Chemistry, University of California at Irvine, Irvine CA, United States; Department of Civil and Environmental Engineering, University of California, Berkeley CA, United States; University of Houston, TX, United States

Recommended Citation:
Warneke C.,De Gouw J.A.,Edwards P.M.,et al. Photochemical aging of volatile organic compounds in the Los Angeles basin: Weekday-weekend effect[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Warneke C.]'s Articles
[De Gouw J.A.]'s Articles
[Edwards P.M.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Warneke C.]'s Articles
[De Gouw J.A.]'s Articles
[Edwards P.M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Warneke C.]‘s Articles
[De Gouw J.A.]‘s Articles
[Edwards P.M.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.