1. Comparisons of watershed sulfur budgets in southeast Canada and northeast US: new approaches and implications
- Author
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Robert Vet, Michael D. Moran, Louis Duchesne, Doug Burns, Jamie Shanley, Christopher Rogers, Myron J. Mitchell, Kathleen C. Weathers, François Courchesne, Cathy Eimers, Gary M. Lovett, Scott W. Bailey, Thomas A. Clair, Daniel Houle, Don C. Buso, Donna B. Schwede, Gene E. Likens, Ivan J. Fernandez, F. D. Beall, and Dean S. Jeffries
- Subjects
Hydrology ,geography ,Biogeochemical cycle ,Watershed ,geography.geographical_feature_category ,Aquatic ecosystem ,Drainage basin ,STREAMS ,Deposition (aerosol physics) ,Drainage divide ,Environmental Chemistry ,Environmental science ,Ecosystem ,Earth-Surface Processes ,Water Science and Technology - Abstract
Most of eastern North America receives elevated levels of atmospheric deposition of sulfur (S) that result from anthropogenic SO2 emissions from fossil fuel combustion. Atmospheric S deposi- tion has acidified sensitive terrestrial and aquatic ecosystems in this region; however, deposition has been declining since the 1970s, resulting in some recovery in previously acidified aquatic ecosystems. Accurate watershed S mass balances help to evaluate the extent to which atmospheric S deposition is retained within ecosystems, and whether internal cycling sources and biogeochemical processes may be affecting the rate of recovery from decreasing S atmospheric loads. This study evaluated S mass balances for 15 sites with watersheds in southeastern Canada and northeastern US for the period 1985 to 2002. These 15 sites included nine in Canada (Turkey
- Published
- 2010