@article {52167,
	title = {Effects of canopy-deposition interaction on H+ supply to soils in Pinus banksiana and Populus tremuloides ecosystems in the Athabasca oil sands region in Alberta, Canada},
	volume = {159},
	year = {2011},
	month = {05/2011},
	pages = {27 pages },
	publisher = {Environmental Pollution },
	abstract = {Soil acidification has been of concern in the oil sands region in Alberta due to increased acid deposition. Using the canopy budget model, and accounting for H+ canopy leaching by organic acids, we determined sources and sinks of H+ in throughfall in jack pine (Pinus banksiana) and trembling aspen (Populus tremuloides) stands in two watersheds from 2006 to 2009. In pine stands, H+ deposition was greater in throughfall than in bulk precipitation while the opposite was true in aspen stands. The annual H+ interception deposition was 148.8{\textendash}193.8 and 49.7{\textendash}70.0 molc ha-1 in pine and aspen stands, respectively; while the annual H+ canopy leaching was 127.1{\textendash}128.7 and 0.0{\textendash}6.0 molc ha-1, respectively. The greater H+ supply in pine stands was caused by greater interception deposition of SO42- and organic acids released from the pine canopy. Such findings have significant implications for establishing critical loads for various ecosystems in the oil sands region.},
	keywords = {acidity, air emissions, alkalinity, model, modeling, monitoring, pH, sulphur and SO2, trees, UofA},
	url = {https://era.library.ualberta.ca/files/3b5919619/EnvironmentalPollution_159_2011_1327.pdf},
	author = {Jung, Kangho and Chang, Scott X. and Arshad, M. A. Charlie}
}
