DOI: 10.1016/j.atmosenv.2014.09.010
Scopus记录号: 2-s2.0-84907169840
论文题名: 3-D agricultural air quality modeling: Impacts of NH3/H2S gas-phase reactions and bi-directional exchange of NH3
作者: Wang K ; , Zhang Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 98 起始页码: 554
结束页码: 570
语种: 英语
英文关键词: Agriculture
; Air quality
; Bi-directional flux
; CMAQ
; NH3/H2S reactions
; Reduced nitrogen and sulfur
Scopus关键词: Air quality
; Air quality modeling
; Bi-directional
; CMAQ
; Gas-phase reactions
; NH<sub>3</sub>/H<sub>2</sub>S reactions
; Reduced nitrogen
; Agriculture
; ammonia
; ammonium nitrate
; nitrogen
; sulfate
; sulfur dioxide
; agricultural ecosystem
; agricultural emission
; air quality
; ammonia
; atmospheric modeling
; atmospheric pollution
; concentration (composition)
; deposition velocity
; environmental fate
; gas exchange
; gas phase reaction
; hydrogen sulfide
; ozone
; particulate matter
; three-dimensional modeling
; air quality
; Article
; calculation
; dry deposition
; humidity
; particulate matter
; precipitation
; simulation
; temperature
; velocity
; 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: Accurately simulating the transport and fate of reduced nitrogen (NHx = ammonia (NH3) + ammonium (NH4+))- and sulfur-containing compounds emitted from agricultural activities represents a major challenge in agricultural air quality modeling. In this study, the Community Multiscale Air Quality (CMAQ) modeling system is further developed and improved by implementing 22 ammonia (NH3)/hydrogen sulfide (H2S) related gas-phase reactions and adjusting a few key parameters (e.g., emission potential) for bi-directional exchange of NH3 fluxes. Several simulations are conducted over the eastern U.S. domain at a 12-km horizontal resolution for January and July 2002 to examine the impacts of those improved treatments on air quality. The 5th generation mesoscale model (MM5) and CMAQ predict an overall satisfactory and consistent performance with previous modeling studies, especially for 2-m temperature, 2-m relative humidity, ozone (O3), and fine particulate matter (PM2.5). High model biases exist for precipitation in July and also dry/wet depositions. The updated model treatments contribute to O3, NHx, and PM2.5 by up to 0.4 ppb, 1.0 μg m-3, and 1.0 μg m-3 in January, respectively, and reduce O3 by up to 0.8 ppb and contribute to NHx and PM2.5 by up to 1.2 and 1.1 μg m-3 in July, respectively. The spatial distributions of O3 in both months and sulfur dioxide (SO2) in January are mainly affected by inline dry deposition velocity calculation. The spatial distributions of SO2 and sulfate (SO42-) in July are affected by both inline dry deposition velocity and NH3/H2S reactions. The variation trends of NH3, NHx, ammonium nitrate (NH4NO3), PM2.5 and total nitrogen (TN) are predominated by bi-directional exchange of NH3 fluxes. Uncertainties of NH3 emission potentials and empirical constants used in the bi-directional exchange scheme may significantly affect the concentrations of NHx and PM2.5, indicating that a more accurate and explicit treatment for those parameters should be considered in the future work. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80624
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Campus Box 8208, Raleigh, NC, United States
Recommended Citation:
Wang K,, Zhang Y. 3-D agricultural air quality modeling: Impacts of NH3/H2S gas-phase reactions and bi-directional exchange of NH3[J]. Atmospheric Environment,2014-01-01,98