The Integrated Lake-Watershed Acidification Study: Atmospheric Inputs

Johannes, Arland H.; Altwicker, Elmar R.; Clesceri, Nicholas L.

doi:10.1007/978-94-009-5498-4_2

Cited by 12 publications

(7 citation statements)

References 6 publications

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“…Dry deposition measurements of base cations at Arbutus Lake watershed were obtained from the measurements at HF by Shepard et al (1989): Na C , 0Ð32; Mg 2C , 0Ð75; K C , 0Ð28; Ca 2C , 1Ð37. These values are similar to values reported by Johannes et al (1985) for the western Adirondacks. Thus, ratios derived from Shepard et al (1989) were used for all sites.…”

Section: Figure 1 Locations Of the Five Sites In New York State At Wsupporting

confidence: 92%

The application of an integrated biogeochemical model (PnET‐BGC) to five forested watersheds in the Adirondack and Catskill regions of New York

Chen

Driscoll

Gbondo-Tugbawa³

et al. 2004

Hydrological Processes

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Abstract:PnET-BGC is an integrated biogeochemical model formulated to simulate the response of soil and surface waters in northern forest ecosystems to changes in atmospheric deposition and land disturbances. In this study, the model was applied to five intensive study sites in the Adirondack and Catskill regions of New York. Four were in the Adirondacks: Constable Pond, an acid-sensitive watershed; Arbutus Pond, a relatively insensitive watershed; West Pond, an acidsensitive watershed with extensive wetland coverage; and Willy's Pond, an acid-sensitive watershed with a mature forest. The fifth was Catskills: Biscuit Brook, an acid-sensitive watershed. Results indicated model-simulated surface water chemistry generally agreed with the measured data at all five sites. Model-simulated internal fluxes of major elements at the Arbutus watershed compared well with previously published measured values. In addition, based on the simulated fluxes, element and acid neutralizing capacity (ANC) budgets were developed for each site. Sulphur budgets at each site indicated little retention of inputs of sulphur. The sites also showed considerable variability in retention of NO 3 . Land-disturbance history and in-lake processes were found to be important in regulating the output of NO 3 via surface waters. Deposition inputs of base cations were generally similar at these sites. Various rates of base cation outputs reflected differences in rates of base cation supply at these sites. Atmospheric deposition was found to be the largest source of acidity, and cation exchange, mineral weathering and in-lake processes served as sources of ANC.

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Section: Figure 1 Locations Of the Five Sites In New York State At Wsupporting

confidence: 92%

The application of an integrated biogeochemical model (PnET‐BGC) to five forested watersheds in the Adirondack and Catskill regions of New York

Chen

Driscoll

Gbondo-Tugbawa³

et al. 2004

Hydrological Processes

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“…A recent analysis of temperature (15 sites) and precipitation (24 sites) data from the Adirondacks found a mean annual precipitation amount of 105Ð4 cm and mean annual air temperature of 6Ð3°C (Ito et al, 2002). Snowfall accounted for 31% of total precipitation in the early 1980s in the western Adirondacks, where most of the study lakes are located (Johannes et al, 1985). The Catskill Park consists of 2Ð4 ð 10 5 ha of predominantly forested land in southeastern New York.…”

Section: Study Sitementioning

confidence: 99%

Response of surface water chemistry to reduced levels of acid precipitation: comparison of trends in two regions of New York, USA

Burns

McHale

Driscoll

et al. 2005

Hydrological Processes

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Abstract:In light of recent reductions in sulphur (S) and nitrogen (N) emissions mandated by Title IV of the Clean Air Act Amendments of 1990, temporal trends and trend coherence in precipitation (1984-2001 and 1992-2001) and surface water chemistry (1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001) were determined in two of the most acid-sensitive regions of North America, i.e. concentrations at all sites, and decreasing trends in NO 3 , C B , and H C concentrations and increasing trends in dissolved organic carbon at most sites. In contrast, acid-neutralizing capacity (ANC) increased significantly at only about half the Adirondack lakes and in one of the Catskill streams. Flow correction prior to trend analysis did not change any trend directions and had little effect on SO 4 2 trends, but it caused several significant non-flow-corrected trends in NO 3 and ANC to become non-significant, suggesting that trend results for flow-sensitive constituents are affected by flow-related climate variation. SO 4 2 concentrations showed high temporal coherence in precipitation, surface waters, and in precipitation-surface water comparisons, reflecting a strong link between S emissions, precipitation SO 4 2 concentrations, and the processes that affect S cycling within these regions. NO 3 and H C concentrations and ANC generally showed weak coherence, especially in surface waters and in precipitation-surface water comparisons, indicating that variation in local-scale processes driven by factors such as climate are affecting trends in acid-base chemistry in these two regions.

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“…The Adirondack region of New York receives elevated inputs of acidic deposition [Johannes et al, 1985] and has geologic and edaphic characteristics which makes surface waters susceptible to acidification [Goldstein et al, 1985;Chen et al, 1984;April and Newton, 1985]. There have been numerous synoptic surveys documenting the chronic acidification of surface waters in the Adirondacks [CoIquhoun et Driscoll and Newton, 1985;Braekke et al, 1988], however, there have been far fewer extensive studies of processes regulating short-term or episodic acidification.…”

Section: Introductionmentioning

confidence: 99%

The episodic acidification of Adirondack Lakes during snowmelt

Schaefer¹,

Driscoll²,

Dreason³

et al. 1990

Water Resources Research

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Maximum values of acid neutralizing capacity (ANC) in Adirondack, New York lake outlets generally occur during summer and autumn. During spring snowmelt, transport of acidic water through acid-sensitive watersheds causes depression of upper lake water ANC. In some systems lake outlet ANC reaches negative values. We examined outlet water chemistry from 11 Adirondack lakes during 1986 and 1987 snowmelts. In these lakes, SO42-concentrations were diluted during snowmelt and did not depress ANC. For lakes with high baseline ANC values, springtime ANC depressions were primarily accompanied by basic cation dilution. For lakes with low baseline ANC, NO•-increases dominated ANC depressions. Lakes with intermediate baseline ANC were affected by both processes and exhibited larger ANC depressions. Ammonium dilution only affected wetland systems. A model predicting a linear relationship between outlet water ANC minima and autumn ANC was inappropriate. To assess watershed response to episodic acidification, hydrologic flow paths must be considered. 1639 1640 SCmtEFER ET AL.' SNOWMELT ACIDIFICATION OF ADIRONDACK LAKES Black Pond © Arbutus Pond North Branch of the Moose River (6 sites)

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The Integrated Lake-Watershed Acidification Study: Atmospheric Inputs

Cited by 12 publications

References 6 publications

The application of an integrated biogeochemical model (PnET‐BGC) to five forested watersheds in the Adirondack and Catskill regions of New York

The application of an integrated biogeochemical model (PnET‐BGC) to five forested watersheds in the Adirondack and Catskill regions of New York

Response of surface water chemistry to reduced levels of acid precipitation: comparison of trends in two regions of New York, USA

The episodic acidification of Adirondack Lakes during snowmelt

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