globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2015.08.011
Scopus记录号: 2-s2.0-84940403929
论文题名:
Assessment of the magnitude and recent trends in satellite-derived ground-level nitrogen dioxide over North America
作者: Kharol S; K; , Martin R; V; , Philip S; , Boys B; , Lamsal L; N; , Jerrett M; , Brauer M; , Crouse D; L; , McLinden C; , Burnett R; T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 118
语种: 英语
英文关键词: GEOS-Chem ; NO2 ; North America ; OMI ; Trend
Scopus关键词: Air quality ; Gas emissions ; Land use ; Nitrogen ; Nitrogen oxides ; Quality control ; Regression analysis ; Chemical transport models ; GEOS-Chem ; Ground level concentrations ; Land-use regression models ; North America ; OMI ; Ozone monitoring instruments ; Trend ; Ultraviolet spectrometers ; nitrogen dioxide ; ozone ; air quality ; atmospheric chemistry ; concentration (composition) ; EOS ; in situ measurement ; magnitude ; monitoring system ; nitrogen dioxide ; ozone ; satellite data ; software ; trend analysis ; air quality ; Article ; land use ; measurement ; North America ; priority journal ; North America
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: We estimate ground-level nitrogen dioxide (NO2) concentrations from the OMI (Ozone Monitoring Instrument) over North America for the period 2005-2012. A chemical transport model (GEOS-Chem) is used to account for effects of the NO2 profile on the column retrieval, and to relate OMI NO2 columns to ground-level concentrations. The magnitude of the period-mean OMI-derived NO2 concentrations is evaluated versus in situ measurements from air quality networks yielding a significant spatial correlation (r = 0.81) but OMI-derived values are lower with a slope of 0.4. Comparison of the in situ concentrations versus spatially resolved concentrations estimated from land use regression models reveals that this difference partially arises from representativeness difference due to preferential placement of in situ monitors at locations with enhanced NO2, coupled with the OMI horizontal resolution. In situ observations provide information about local concentrations while OMI offers area-averaged information. The remaining difference is less readily explained and appears to include a combination of the effects of local unresolved geophysical processes affecting both the NO2 retrieval and the vertical profile used to relate the column to ground level. We also evaluate trends over North America from OMI and in situ measurements for the period of 2005-2012. OMI derived ground-level NO2 well reproduces the spatial pattern of the in situ trends (r = 0.77) and the slope of 0.4 versus the trend from in situ monitors is consistent with the slope versus mean concentrations. Absolute regional trends inferred from in situ measurements alone may overestimate area average changes. Nonetheless coincidently sampled ground-level NO2 concentrations from OMI and in situ measurements for 2005-2012 exhibit similar relative decreases over Eastern (-6.5 ± 2.0%/yr, -7.1 ± 1.3%/yr), Western (-4.5 ± 1.1%/yr, -6.5 ± 0.7%/yr) and Central (-3.3 ± 2.3%/yr, -4.1 ± 0.8%/yr) North America. © 2015 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81554
Appears in Collections:气候变化事实与影响

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作者单位: Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Canada; Air Quality Research Division, Environment Canada, Toronto, ON, Canada; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Division of Environmental Health Sciences, School of Public Health, University of California, 50 University Hall MC7360, Berkeley, CA, United States; School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada; Population Studies Division, Health Canada, Ottawa, Canada

Recommended Citation:
Kharol S,K,, Martin R,et al. Assessment of the magnitude and recent trends in satellite-derived ground-level nitrogen dioxide over North America[J]. Atmospheric Environment,2015-01-01,118
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