Acidification
; Air pollution
; Air quality
; Environmental impact
; Eutrophication
; Nitrogen
; Nitrogen oxides
; Oil fields
; Sand
; Sulfur
; Sulfur dioxide
; Acid deposition
; Acidifying compounds
; Athabasca oil sands
; Community multi-scale air qualities
; Deposition patterns
; Impact minimization
; Management frameworks
; Nitrogen deposition
; Oil sands
; nitrogen
; nitrogen derivative
; sulfur
; acid deposition
; air quality
; atmospheric modeling
; chemical compound
; chemical pollutant
; emission control
; environmental impact assessment
; environmental management
; nitrogen oxides
; pollution control
; spatiotemporal analysis
; acid deposition
; air quality
; Alberta
; Article
; atmospheric deposition
; controlled study
; eutrophication
; leaf area
; meteorology
; nitrogen deposition
; pollutant
; precipitation
; priority journal
; tar sand
; wet deposition
; Alberta
; Athabasca Oil Sands
; Canada
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:
Acid deposition is a potential environmental impact of oil sands development in the Athabasca Oil Sands Region (AOSR) in Northeastern Alberta. An acid deposition management framework has been established to manage this issue. This framework includes an acid deposition modelling and time-to-effect impact assessment component that was recently implemented for four acidifying emissions cases using the Community Multi-scale Air Quality (CMAQ) model. Predicted gross Potential Acid Input (PAI) deposition in the AOSR increases from the historical to existing case with further increases predicted in two future cases due to the projected increase in NOx emissions. On average the total predicted PAI deposition in the AOSR is approximately 40% sulphur deposition and 60% nitrogen deposition. Sulphur deposition decreases by 7% from the historical to existing cases due to the reductions in SO2 emissions that have occurred in the AOSR but increases by 5% from the existing to future case 1 and by 8% from existing to future case 2 even though continued AOSR SO2 emission decreases were modelled. This is likely the result of the deposition reduction associated with a single large reduction in SO2 emissions from one facility's main stack being offset elsewhere in the AOSR by deposition increases due to small increases in SO2 emissions from several in situ sources with shorter stacks. Average nitrogen deposition over the AOSR increases by 10% from the historical to existing case and then further increases by 10.6% from the existing case to future case 1 and by 12.3% from the existing case to future case 2. The increasing relevance of NOx emissions over SO2 emissions in the AOSR suggests that a robust treatment of nitrogen chemistry such as in CMAQ is required for conducting deposition assessments in the region. The modelling results provide information that can be used to inform oil sands emission management priorities in the context of acid deposition and nitrogen eutrophication impact minimization. � 2017
Cumulative Environmental Management Association, Air Working Group, Fort McMurray, AB, Canada; Government of Alberta, Alberta Environment and Parks, Edmonton, AB, Canada; Ramboll Environ, Novato, CA, United States
Recommended Citation:
Cho S,, Vijayaraghavan K,, Spink D,et al. Assessment of regional acidifying pollutants in the Athabasca oil sands area under different emission scenarios[J]. Atmospheric Environment,2017-01-01,156