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6 results found
This study applied the Model of Acidification of Groundwater in Catchments (MAGIC) to estimate the sensitivity of 66 watersheds in the Southern Blue Ridge Province of the Southern Appalachian Mountains, United States, to changes in atmospheric sulfur (S) deposition. MAGIC predicted that stream acid…
Author(s): Timothy Sullivan, Bernard Cosby, William Jackson, Kai Snyder, Alan Herlihy
Keywords: Sulfur, Atmospheric deposition, Base cation, Acidification, Modeling
Source: Water Air Soil Pollut 219:11-26
Year: 2011
An important tool in the evaluation of acidification damage to aquatic and terrestrial ecosystems is the critical load (CL), which represents the steady-state level of acidic deposition below which ecological damage would not be expected to occur, according to current scientific understanding. A…
Author(s): Timothy Sullivan, Bernard Cosby, William Jackson
Keywords: Sulfur, Critical load, Target load, Acidification, Stream, Modeling
Source: Journal of Environmental Management 92:2953-2960
Year: 2011
The 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…
Author(s): T.C. McDonnell, B.J. Cosby, T.J. Sullivan, S.G. McNulty, E.C. Cohen
Keywords: Acidification, Weathering, Sulfur, Critical load, Atmospheric deposition
Source: Environmental Pollution 158:2934-2939
Year: 2010
Due to the potential ecological effects on terrestrial and aquatic ecosystems from atmospheric deposition in the Athabasca Oil Sands Region (AOSR), Alberta, Canada, this study was implemented to estimate atmospheric nitrogen (N) and sulfur (S) inputs. Passive samplers were used to measure ambient…
Author(s): Yu-Mei Hsu, Andrzej Bytnerowicz, Mark E. Fenn, Kevin E. Percy
Keywords: Passive samplers, Atmospheric dry deposition, Nitrogen, Sulfur, Multi-layer inference model, Throughfall measurement
Source: Science of The Total Environment. 568: 285-295
Year: 2016
Lakes and streams in Class 1 wilderness areas in the western United States (U.S.) are at risk from atmospheric deposition of nitrogen (N) and sulfur (S), and protection of these resources is mandated under the Federal Clean Air Act and amendments. Assessment of critical loads, which are the maximum…
Author(s): David W. Clow, Heidi A. Roop, Leora Nanus, Mark E. Fenn, Graham A. Sexstone
Keywords: Nitrogen, Sulfur, Deposition, Isotopes, Ion-exchange, Park
Source: Atmospheric Environment. 101: 149-157
Year: 2015
Trace gas, particulate matter and deposition data collected in the Athabasca Oil Sands Region (AOSR) from 2000 to 2017 were evaluated as part of a broad scientific programmatic review. Results showed significant spatial patterns and temporal trends across the region. Concentrations of reactive…
Author(s): Eric S. Edgerton, Yu-Mei Hsu, Emily M. White, Mark E. Fenn, Matthew S. Landis
Keywords: Sulfur, Nitrogen, Base cations, Atmospheric deposition, Nitric acid, Ammonia, Boreal forest, Oil sands
Source: Science of The Total Environment. 706: 134864
Year: 2020