PMID: 11918018Mar 29, 2002Paper

Recovery of streams from episodic acidification in northern Sweden

Environmental Science & Technology
Hjalmar Laudon, Harry F Hemond

Abstract

Between 1990 and 1999, SO4(2-) deposition in northern Sweden decreased by over 50%. To determine if a corresponding amelioration of stream acidity has occurred, we analyzed trends in anthropogenically driven episodic acidification in five streams during the same time period, using the Boreal Dilution Model (BDM) (Bishop, K. H.; Laudon, H.; Kohler, S. Water Resour. Res. 2000, 36, 1873-1884). Although there was no significant change in the annual average streamwater chemistry, the anthropogenically driven episodic acidification associated with spring flood runoff decreased by between 40% and 80%. A strong correlation between winter SO4(2-) deposition and the anthropogenic component of episodic acidification in these five streams suggests that future reductions of acid deposition will further improve the spring flood acidification situation in northern Sweden. These results argue that reduced emissions of acid precursors have generated significant improvements in the surface water chemistry during episodes associated with spring runoff in northern Sweden.

References

Aug 1, 1995·Environmental Science & Technology·J W Kirchner, E Lydersen

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Citations

Jun 11, 2010·Environmental Monitoring and Assessment·Hjalmar Laudon, Stephen A Norton
Sep 19, 2007·Environmental Science & Technology·Kathleen M KlineNancy M Castro
Dec 3, 2004·Environmental Science & Technology·H LaudonD S Jeffries
Jun 22, 2006·Environmental Science & Technology·Neil CoryKevin Bishop

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