@article {52519,
	title = {Has Alberta oil sands development increased far-field delivery of airborne contaminants to the Peace-Athabasca Delta?},
	volume = {433},
	year = {2012},
	month = {09/2012},
	pages = {3 pages },
	publisher = {Science of the Total Environment },
	abstract = {Identifying potential regional contamination by Alberta oil sands industrial emissions on sensitive ecosystems like the Peace{\textendash}Athabasca Delta, ~ 200 km to the north, requires knowledge of historical contaminant levels and trends. Here we provide some of these critically-needed data, based on analysis of metals in a sediment core from an upland precipitation-fed lake in the delta. The lake is well-situated to record the anthropogenic history of airborne contaminant deposition for this region. Sediment records of metals of concern (Pb, Sb, As, Hg) reflect early to mid-20th century increases in North American industrial emissions, followed by reduced emissions due to improved industrial practices after 1950{\textendash}70. Notably, Pb, Sb, As and Hg have declined since the onset of Alberta oil sands production, belying concerns that this activity has enhanced far-field atmospheric delivery of these contaminants to the delta.},
	keywords = {air emissions, lake, metals, sediment},
	url = {https://www.ceaa-acee.gc.ca/050/documents_staticpost/59540/82534/Oil_Sands_Development_-_Wiklund.pdf},
	author = {Wiklund, J. A. and Hall, R.I. and Wolfe, B. B. and Edwards, T. W. D. and Farwell, A. J. and Dixon, D. G.}
}
