Skip to Main Content
Comparison among model estimates of critical loads of acidic deposition using different sources and scales of input dataAuthor(s): T.C. McDonnell; B.J. Cosby; T.J. Sullivan; S.G. McNulty; E.C. Cohen
Source: Environmental Pollution 158:2934-2939
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (291.07 KB)
DescriptionThe critical load (CL) of acidic atmospheric deposition represents the load of acidity deposited from the atmosphere to the earth’s surface at which harmful acidification effects on sensitive biological receptors are thought to occur. In this study, the CL for forest soils was estimated for 27 watersheds throughout the United States using a steady-state mass balance approach based on both national and site-specific data and using different approaches for estimating base cation weathering. Results suggested that the scale and source of input data can have large effects on the calculated CL and that the most important parameter in the steady-state model used to estimate CL is base cation weathering. These results suggest that the data and approach used to estimate weathering must be robust if the calculated CL is to be useful for its intended purpose.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
CitationMcDonnell, T.C.; Cosby, B.J.; Sullivan, T.J.; McNulty, S.G.; Cohen, E.C. 2010. Comparison among model estimates of critical loads of acidic deposition using different sources and scales of input data. Environmental Pollution 158:2934-2939.
KeywordsAcidification, Weathering, Sulfur, Critical load, Atmospheric deposition
- Steady-state sulfur critical loads and exceedances for protection of aquatic ecosystems in the U.S. southern Appalachian Mountains
- The critical loads and levels approach for nitrogen
- Critical Loads of Acid Deposition for Wilderness Lakes in the Sierra Nevada (California) Estimated by the Steady-State Water Chemistry Model
XML: View XML