DOI: 10.1016/j.atmosenv.2017.06.026
Scopus记录号: 2-s2.0-85020917252
论文题名: Allocating emissions to 4 km and 1 km horizontal spatial resolutions and its impact on simulated NOx and O3 in Houston, TX
作者: Pan S ; , Choi Y ; , Roy A ; , Jeon W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 164 起始页码: 398
结束页码: 415
语种: 英语
英文关键词: CMAQ
; Fine resolution emissions
; Ozone
; Process analysis
; Spatial allocation
Scopus关键词: Air pollution
; Air quality
; Chemical analysis
; Environmental Protection Agency
; Forecasting
; Gas emissions
; NASA
; Nitrogen oxides
; Ozone
; Pollution
; Regional planning
; Urban growth
; Urban transportation
; Air quality modeling
; CMAQ
; Fine resolution
; Meteorological condition
; Process analysis
; Reduction of emissions
; Spatial allocation
; United States environmental protection agency
; Industrial emissions
; nitric oxide
; nitrogen oxide
; ozone
; air quality
; emission control
; industrial emission
; industrial location
; nitrogen oxides
; ozone
; smoke
; spatial resolution
; air pollutant
; air quality
; aircraft
; airport
; Article
; atmosphere
; controlled study
; gas
; government
; grid cell
; Gulf of Mexico
; highway
; meteorological phenomena
; meteorology
; priority journal
; simulation
; temperature
; Texas
; urban area
; Atlantic Ocean
; Gulf of Mexico
; Houston
; Texas
; 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: A WRF-SMOKE-CMAQ air quality modeling system was used to investigate the impact of horizontal spatial resolution on simulated nitrogen oxides (NOx) and ozone (O3) in the Greater Houston area (a non-attainment area for O3). We employed an approach recommended by the United States Environmental Protection Agency to allocate county-based emissions to model grid cells in 1 km and 4 km horizontal grid resolutions. The CMAQ Integrated Process Rate analyses showed a substantial difference in emissions contributions between 1 and 4 km grids but similar NOx and O3 concentrations over urban and industrial locations. For example, the peak NOx emissions at an industrial and urban site differed by a factor of 20 for the 1 km and 8 for the 4 km grid, but simulated NOx concentrations changed only by a factor of 1.2 in both cases. Hence, due to the interplay of the atmospheric processes, we cannot expect a similar level of reduction of the gas-phase air pollutants as the reduction of emissions. Both simulations reproduced the variability of NASA P-3B aircraft measurements of NOy and O3 in the lower atmosphere (from 90 m to 4.5 km). Both simulations provided similar reasonable predictions at surface, while 1 km case depicted more detailed features of emissions and concentrations in heavily polluted areas, such as highways, airports, and industrial regions, which are useful in understanding the major causes of O3 pollution in such regions, and to quantify transport of O3 to populated communities in urban areas. The Integrated Reaction Rate analyses indicated a distinctive difference of chemistry processes between the model surface layer and upper layers, implying that correcting the meteorological conditions at the surface may not help to enhance the O3 predictions. The model-observation O3 bias in our studies (e.g., large over-prediction during the nighttime or along Gulf of Mexico coastline), were due to uncertainties in meteorology, chemistry or other processes. Horizontal grid resolution is unlikely the major contributor to these biases. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82730
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Atmospheric Sciences, University of Houston, 312 Science & Research Building 1, Houston, TX, United States
Recommended Citation:
Pan S,, Choi Y,, Roy A,et al. Allocating emissions to 4 km and 1 km horizontal spatial resolutions and its impact on simulated NOx and O3 in Houston, TX[J]. Atmospheric Environment,2017-01-01,164