| Autor: |
Chris A McLinden, Cristen L F Adams, Vitali Fioletov, Debora Griffin, Paul A Makar, Xiaoyi Zhao, Andrew Kovachik, Nolan Dickson, Cassandra Brown, Nicolay Krotkov, Can Li, Nicolas Theys, Pascal Hedelt, Diego G Loyola |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Environmental Research Letters, Vol 16, Iss 1, p 014012 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1748-9326 |
| DOI: |
10.1088/1748-9326/abcbbb |
| Popis: |
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 . |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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