DOI: 10.1016/j.atmosenv.2014.07.004
Scopus记录号: 2-s2.0-84904269761
论文题名: Measured and modeled CO and NOy in DISCOVER-AQ: An evaluation of emissions and chemistry over the eastern US
作者: Anderson D ; C ; , Loughner C ; P ; , Diskin G ; , Weinheimer A ; , Canty T ; P ; , Salawitch R ; J ; , Worden H ; M ; , Fried A ; , Mikoviny T ; , Wisthaler A ; , Dickerson R ; R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 96 起始页码: 78
结束页码: 87
语种: 英语
英文关键词: Air quality
; CMAQ
; CO
; National Emissions Inventory
; On-road emissions
Scopus关键词: Air quality
; Catalytic converters
; Cobalt
; Air quality policy
; Ambient ozone concentration
; CMAQ
; Community multi-scale air qualities
; National emissions inventories
; On-road emissions
; Remote observation
; Satellite observations
; Ozone
; carbon monoxide
; formaldehyde
; isoprene
; nitric oxide
; ozone
; volatile organic compound
; air quality
; atmospheric chemistry
; atmospheric modeling
; atmospheric pollution
; carbon emission
; carbon monoxide
; catalysis
; concentration (composition)
; nitrate
; nitrogen oxides
; ozone
; policy making
; satellite imagery
; air quality
; article
; boundary layer
; chemical model
; circadian rhythm
; community multiscale air quality model
; controlled study
; diesel engine
; exhaust gas
; green chemistry
; planetary boundary layer
; priority journal
; uncertainty
; United States
; Baltimore
; Maryland
; United States
; Washington [United States]
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Data collected during the 2011 DISCOVER-AQ field campaign in the Baltimore Washington region were used to evaluate CO and NOx emissions in the National Emissions Inventory (NEI). The average emissions ratio for the region was seen to be 11.2±1.2molCO/molNOx, 21% higher than that predicted by the NEI. Comparisons between in situ and remote observations and CMAQ model output show agreement in CO emissions of 15±11% while NOx emissions are overestimated by 51-70% in Maryland. Satellite observations of CO by MOPITT show agreement with the Community Multiscale Air Quality (CMAQ) model within 3% over most of the eastern United States. CMAQ NOy mixing ratios were a factor of two higher than observations and result from a combination of errors in emissions and PAN and alkyl nitrate chemistry, as shown by comparison of three CMAQ model runs. Point source NOx emissions are monitored and agree with modeled emissions within 1% on a monthly basis. Because of this accuracy and the NEI assertion that approximately 3/4 of emissions in the Baltimore Washington region are from mobile sources, the MOVES model's treatment of emissions from aging vehicles should be investigated; the NEI overestimate of NOx emissions could indicate that engines produce less NOx and catalytic converters degrade more slowly than assumed by MOVES2010. The recently released 2011 NEI has an even lower CO/NOx emissions ratio than the projection used in this study; it overestimates NOx emissions by an even larger margin. The implications of these findings for US air quality policy are that NOx concentrations near areas of heavy traffic are overestimated and ozone production rates in these locations are slower than models indicate. Results also indicate that ambient ozone concentrations will respond more efficiently to NOx emissions controls but additional sources may need to be targeted for reductions. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81031
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric and Oceanic Sciences, University of Maryland, College Park, MD 20742, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, United States; NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; NASA Langley Research Center, Hampton, VA 23681, United States; National Center for Atmospheric Research, Boulder, CO 80305, United States; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80303, United States; Oak Ridge Associated Universities, Oak Ridge, TN 37830, United States; Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria; Department of Chemistry, University of Oslo, Oslo, Norway
Recommended Citation:
Anderson D,C,, Loughner C,et al. Measured and modeled CO and NOy in DISCOVER-AQ: An evaluation of emissions and chemistry over the eastern US[J]. Atmospheric Environment,2014-01-01,96