DOI: 10.1016/j.atmosenv.2013.11.070
Scopus记录号: 2-s2.0-84891141016
论文题名: Estimation of direct emissions and atmospheric processing of reactive mercury using inverse modeling
作者: De Foy B ; , Heo J ; , Schauer J ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 85 起始页码: 73
结束页码: 82
语种: 英语
英文关键词: Emissions inventory
; Inverse modeling
; Mercury
; Mercury oxidation
; Reactive mercury
Scopus关键词: Atmospheric pollutants
; Emission inventories
; Emissions inventory
; Gaseous elemental mercury
; Inverse modeling
; Mercury concentrations
; Mercury oxidations
; Reactive gaseous mercury
; Atmospheric chemistry
; Bromine
; Computer simulation
; Deforestation
; Estimation
; Fires
; Inverse problems
; Oxidation
; Ozone
; Time series
; Mercury (metal)
; bromine
; hydroxyl radical
; mercury
; ozone
; surface water
; anthropogenic source
; atmospheric pollution
; emission inventory
; forest fire
; hydroxyl radical
; inverse analysis
; mercury (element)
; numerical model
; oxidation
; photochemistry
; urban atmosphere
; article
; atmospheric dispersion
; exhaust gas
; forest
; lake
; oxidation
; oxygen transport
; ozone layer
; priority journal
; simulation
; time series analysis
; United States
; urban area
; Deforestation
; Estimation
; Fires
; Mercury
; Oxidation
; Ozone
; Simulation
; United States
; Wisconsin
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: There are large uncertainties in the estimation of sources of reactive mercury in current photochemical models, with many models suggesting that three quarters or more of reactive mercury in the atmosphere is due to secondary oxidation of the gaseous elemental mercury present in the global background. An inverse model is used to estimate the sources of mercury at an urban site in Wisconsin based on a year long time series of hourly measurements. The model combines high resolution backtrajectories simulated with WRF and WRF-FLEXPART, forward simulations of passive tracers using a transport model (CAMx), hourly time series of atmospheric pollutant concentrations and time series from a chemical box model for oxidation of elemental mercury by ozone, the hydroxyl radical and bromine. The hybrid formulation provides an estimate of the mercury concentrations on a polar grid surrounding the site along with emission scaling factors for emissions from forest fires and lake surfaces. In addition, the model estimates the impact of oxidation of gaseous elemental mercury from the three pathways. The inverse model identified direct emissions of reactive mercury, defined as the sum of reactive gaseous mercury and particle-bound mercury, that are associated with regional sources and with forest fires. The results suggest that oxidation by ozone is adequately characterized in existing chemical mechanisms, but that oxidation by the hydroxyl radical and by bromine may be underestimated. The results suggest that between 50 and 70 percent of the reactive mercury at the measurement site is due to direct emissions and hence suggest the importance of developing emission inventories for reactive mercury species. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80782
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, Saint Louis University, United States; Earth and Life Institute, Université catholique de Louvain, Belgium; Civil and Environmental Engineering, University of Wisconsin-Madison, United States
Recommended Citation:
De Foy B,, Heo J,, Schauer J,et al. Estimation of direct emissions and atmospheric processing of reactive mercury using inverse modeling[J]. Atmospheric Environment,2014-01-01,85