Groundwater Al dynamics in boreal hillslopes at three integrated monitoring sites along a sulphur deposition gradient in Sweden

Löfgren, Stefan; Cory, Neil

doi:10.1016/j.jhydrol.2009.11.004

Cited by 13 publications

(12 citation statements)

References 38 publications

(41 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soil water, groundwater, and streamwater showed well-buffered conditions (ANC [ 0 leq l -1 ), relatively high pH ([5), and low ionic strength (\0.32 mmol l -1 , Table 3). Throughout the study period, bicarbonate was frequently detected in both groundwater and streamwater (data not shown, Löfgren and Cory, 2010). SO 4 2-concentrations in soil water and streamwater declined over the study period accompanied by increases in ANC and pH in runoff (Table 4).…”

Section: Effects Of S Deposition Decline At Each Of the Sitesmentioning

confidence: 90%

“…& 0.1). Recently, the Al dynamics at Aneboda, Kindla, and Gammtratten were evaluated (Löfgren and Cory, 2010) and it was shown that the Al species composition and Al t levels were strongly related to the pH and DOC concentrations in groundwater. In addition, the Al t concentrations were reduced in the near-stream zone (\2 m) at Kindla due to mixing with well-buffered deep groundwater.…”

Section: Effects Of S Deposition Decline At Each Of the Sitesmentioning

confidence: 99%

“…In this study, the observed decreased Al t concentrations at Gårdsjön and Kindla are probably explained by increased pH in soil water and groundwater (significant in groundwater only at Kindla, Table 4). Unfortunately, the IM piezometers are installed too far from the streams to capture processes in the near-stream zone (Löfgren and Cory 2010).…”

Section: Effects Of S Deposition Decline At Each Of the Sitesmentioning

confidence: 99%

See 2 more Smart Citations

Recovery of Soil Water, Groundwater, and Streamwater From Acidification at the Swedish Integrated Monitoring Catchments

Löfgren

Aastrup

Bringmark

et al. 2011

AMBIO

Self Cite

View full text Add to dashboard Cite

Recovery from anthropogenic acidification in streams and lakes is well documented across the northern hemisphere. In this study, we use 1996-2009 data from the four Swedish Integrated Monitoring catchments to evaluate how the declining sulfur deposition has affected sulfate, pH, acid neutralizing capacity, ionic strength, aluminum, and dissolved organic carbon in soil water, groundwater and runoff. Differences in recovery rates between catchments, between recharge and discharge areas and between soil water and groundwater are assessed. At the IM sites, atmospheric deposition is the main human impact. The chemical trends were weakly correlated to the sulfur deposition decline. Other factors, such as marine influence and catchment features, seem to be as important. Except for pH and DOC, soil water and groundwater showed similar trends. Discharge areas acted as buffers, dampening the trends in streamwater. Further monitoring and modeling of these hydraulically active sites should be encouraged.

show abstract

Section: Effects Of S Deposition Decline At Each Of the Sitesmentioning

confidence: 90%

Section: Effects Of S Deposition Decline At Each Of the Sitesmentioning

confidence: 99%

Section: Effects Of S Deposition Decline At Each Of the Sitesmentioning

confidence: 99%

See 1 more Smart Citation

Recovery of Soil Water, Groundwater, and Streamwater From Acidification at the Swedish Integrated Monitoring Catchments

Löfgren

Aastrup

Bringmark

et al. 2011

AMBIO

Self Cite

View full text Add to dashboard Cite

show abstract

“…The sites have been thoroughly investigated for more than a decade. All sites have been intensively monitored for a large number of chemical (Löfgren and Cory 2010), meteorological, and biological (Grandin et al 2011 a, b) parameters. In this study, we primarily concentrate on the soil and surface water chemical data that are available from the Swedish University of Agricultural Sciences Department of Aquatic Sciences and Assessment databases (http://info1.ma.slu.se/IM/).…”

Section: Methodsmentioning

confidence: 99%

“…A recent study (Sjöstedt et al 2010) has shown that gibbsite supersaturation occurs at pH 6 and above. Based on data from Kindla, Löfgren and Cory (2010) suggested cationic Al is formed due to decomplexation of organic Al when the groundwater discharges into the more acidic stream. Assuming equilibrium with gibbsite when running MAGIC at sites with high organic acidity in combination with a natural low pH (such as may be encountered in many headwater forest streams and mires) would lead to significant systematic errors if a secondary phase is not actually present.…”

Section: The Effect Of Modeled Aluminum Fluxes On Surface Water Ph Anmentioning

confidence: 99%

Assessment of Uncertainty in Long-Term Mass Balances for Acidification Assessments: A MAGIC Model Exercise

Köhler¹,

Zetterberg

Bishop³

et al. 2011

AMBIO

View full text Add to dashboard Cite

Long-term (1860-2010) catchment mass balance calculations rely on models and assumptions which are sources of uncertainty in acidification assessments. In this article, we report on an application of MAGIC to model acidification at the four Swedish IM forested catchments that have been subject to differing degrees of acidification stress. Uncertainties in the modeled mass balances were mainly associated with the deposition scenario and assumptions about sulfate adsorption and soil mass. Estimated base cation (BC) release rates (weathering) varied in a relatively narrow range of 47-62 or 42-47 meq m -2 year -1 , depending on assumptions made about soil cation exchange capacity and base saturation. By varying aluminum solubility or introducing a dynamic weathering feedback that allowed BC release to increase at more acidic pHs, a systematic effect on predicted changes in acid neutralizing capacity (DANC ca. 10-41 leq l -1 ) and pH (ca. DpH = 0.1-0.6) at all sites was observed. More robust projections of future changes in pH and ANC are dependent on reducing uncertainties in BC release rates, the timing, and extent of natural acidification through BC uptake by plants, temporal changes in soil element pools, and fluxes of Al between compartments.

show abstract

Sensitivity of stream dissolved organic carbon to temperature and discharge: Implications of future climates

et al. 2016

View full text Add to dashboard Cite

Dissolved organic carbon (DOC) is a significant constituent in aquatic ecosystems with concentrations in streams influenced by both temperature and water flow pathway dynamics associated with changes in discharge (streamflow). We investigated the sensitivity of DOC concentrations in 12 high‐latitude headwater streams to changes in temperature and discharge using a mathematical model. The implications of differences in sensitivities were explored by using downscaled projections of air temperature and discharge to simulate possible trajectories of DOC concentrations in a changing climate. We found two distinct responses: (i) catchments where stream DOC sensitivity was high to temperature but low to discharge and (ii) catchments where stream DOC sensitivity was low to temperature but high to discharge. Streams with strong seasonal DOC dynamics were more sensitive to temperature changes than nonseasonal systems. In addition, stream DOC sensitivity to discharge was strongly correlated with vertical soil water DOC differences in the near‐stream zone. Simulations of possible future changes in DOC concentrations indicated median increases of about 4–24% compared to current levels when using projections of air temperature and discharge but even larger increases were observed for base flow concentrations (13–42%). Streams with high‐temperature sensitivity showed the largest increases in DOC concentrations. Our results suggest that future climatic changes could bring significant increases in surface water DOC concentrations in boreal and hemiboreal areas but that the response ultimately is dependent on vertical soil solution DOC differences and soil organic carbon distribution.

show abstract

Groundwater Al dynamics in boreal hillslopes at three integrated monitoring sites along a sulphur deposition gradient in Sweden

Cited by 13 publications

References 38 publications

Recovery of Soil Water, Groundwater, and Streamwater From Acidification at the Swedish Integrated Monitoring Catchments

Recovery of Soil Water, Groundwater, and Streamwater From Acidification at the Swedish Integrated Monitoring Catchments

Assessment of Uncertainty in Long-Term Mass Balances for Acidification Assessments: A MAGIC Model Exercise

Sensitivity of stream dissolved organic carbon to temperature and discharge: Implications of future climates

Contact Info

Product

Resources

About