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Inconsistencies in sulfur dioxide emissions from the Canadian oil sands and potential implications
Satellite-derived and reported sulfur dioxide (SO _2 ) emissions from the Canadian oil sands are shown to have been consistent up to 2013. Post-2013, these sources of emissions data diverged, with reported emissions dropping by a factor of two, while satellite-derived emissions for the region remained relatively constant, with the discrepancy (satellite-derived emissions minus reported emissions) peaking at 50 kt(SO _2 ) yr ^−1 around 2016. The 2013–2014 period corresponds to when new flue-gas desulfurization units came on-line. Previous work has established a high level of consistency between at-stack SO _2 emissions observations and satellite estimates, and surface monitoring network SO _2 concentrations over the same multi-year period show similar trends as the satellite data, with a slight increase in concentrations post-2013. No clear explanation for this discrepancy currently exists. The implications of the discrepancy towards estimated total sulfur deposition to downwind ecosystems were estimated relative to 2013 emissions levels, with the satellite-derived values leaving the area of regional critical load exceedances of aquatic ecosystems largely unchanged from 2013 values, 335 000 km ^2 , and reported values potentially decreasing this area to 185 000 km ^2 .
Inconsistencies in sulfur dioxide emissions from the Canadian oil sands and potential implications
Satellite-derived and reported sulfur dioxide (SO _2 ) emissions from the Canadian oil sands are shown to have been consistent up to 2013. Post-2013, these sources of emissions data diverged, with reported emissions dropping by a factor of two, while satellite-derived emissions for the region remained relatively constant, with the discrepancy (satellite-derived emissions minus reported emissions) peaking at 50 kt(SO _2 ) yr ^−1 around 2016. The 2013–2014 period corresponds to when new flue-gas desulfurization units came on-line. Previous work has established a high level of consistency between at-stack SO _2 emissions observations and satellite estimates, and surface monitoring network SO _2 concentrations over the same multi-year period show similar trends as the satellite data, with a slight increase in concentrations post-2013. No clear explanation for this discrepancy currently exists. The implications of the discrepancy towards estimated total sulfur deposition to downwind ecosystems were estimated relative to 2013 emissions levels, with the satellite-derived values leaving the area of regional critical load exceedances of aquatic ecosystems largely unchanged from 2013 values, 335 000 km ^2 , and reported values potentially decreasing this area to 185 000 km ^2 .
Inconsistencies in sulfur dioxide emissions from the Canadian oil sands and potential implications
Chris A McLinden (author) / Cristen L F Adams (author) / Vitali Fioletov (author) / Debora Griffin (author) / Paul A Makar (author) / Xiaoyi Zhao (author) / Andrew Kovachik (author) / Nolan Dickson (author) / Cassandra Brown (author) / Nicolay Krotkov (author)
2020
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
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