Abstract
Daily air and precipitation chemistry observations at six rural locations in eastern Canada were analyzed to obtain wet and dry deposition. Dry deposition was calculated from air concentrations using deposition velocities originating from a recent literature review and synthesis exercise involving land use types. Total annual deposition ranges for SO =4 from 10 to 86 mmol m-2 and for NO -3 excluding NO2 contributions to dry deposition from 13 to 62 mmol m2 −. Dry deposition accounts for an estimated 22 and 21% of the total SO =4 and NO -3 deposition, respectively. For NO -3 , this fraction increases to 30% if NO2 concentration to dry deposition is included. There is a marked seasonal variation in total SO =4 deposition but not in that of NO -3 . Both wet and dry deposition are episodic. 20% of daily events deliver between 47 and 70% of the deposition.
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References
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Barrie, L.A., Sirois, A. (1986). Wet and Dry Deposition of Sulphates and Nitrates in Eastern Canada: 1979–1982. In: Martin, H.C. (eds) Acidic Precipitation. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3385-9_31
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DOI: https://doi.org/10.1007/978-94-009-3385-9_31
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