Uncertainty in predicting weathering rate and environmental stress factors with the profile model

Jönsson, Charlotta; Wärfvinge, Per; Sverdrup, Harald

doi:10.1007/bf00477253

Cited by 60 publications

(39 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zak et al (1997) showed that the calculated WR rate from PROFILE was mostly sensitive to soil mineralogy and other physical parameters (soil moisture content, exposed mineral surface area, and soil bulk density). According to Jönsson et al (1995), the uncertainty associated with the PROFILE estimation of WR for three Podzols (similar to this study) was ±40%. Most methods for WR determination are accurate at approximately ±50% according to Hodson and Langan (1999b).…”

Section: Uncertainties Associated With Wr Estimationsupporting

confidence: 79%

“…The use of only one soil profile, albeit representative, for WR calculations with the PMB and PROFILE methods made it difficult to compare our analyses with other multiple sampling (CT) or watershed-scaled (IOB, CLT, MAGIC) methods. The accuracy of WR rates obtained with the PROFILE model has been widely studied (Jönsson et al 1995;Hodson et al 1996Hodson et al , 1997Zak et al 1997). In the case of the PMB method, a sensitivity analysis was performed on the main variables used to calculate WR BC (Ti and BC content, horizon thickness, bulk density, and time since deglaciation) of the representative soil profiles.…”

Section: Statistical and Sensitivity Analysesmentioning

confidence: 99%

See 1 more Smart Citation

Base cation mineral weathering and total release rates from soils in three calibrated forest watersheds on the Canadian Boreal Shield

Ouimet¹,

Duchesne²

2005

Can. J. Soil. Sci.

View full text Add to dashboard Cite

Ouimet, R. and Duchesne, L. 2005. Base cation mineral weathering and total release rates from soils in three calibrated forest watersheds on the Canadian Boreal Shield. Can. J. Soil Sci. 85: 245-260. Total release rates of base cations (Ca, Mg, K, and Na) from soils and from watersheds were evaluated using three methods. Three methods, one of which is new, were also used to evaluate mineral weathering rates of soils for three calibrated forest watersheds in the forest ministry's monitoring network (Réseau d'étude et de surveillance des ecosystems forestiers: Quebec Forest Ecosystem Research and Monitoring Network; RESEF) on the Canadian Boreal Shield. We also compiled an extensive literature review of forest soil base cation release rates, focussed on northeastern North American forest soils of granitic lithology. With the exception of the total release and mineral weathering of Ca from soils at the Lake Laflamme Watershed site, and the total release of K from the three watersheds, soils and watershed release rates for the three watersheds were within the confidence interval of release rates compiled for forest ecosystems with similar granitic environment (compiled data for solum [mmol (+) m -2 yr -1 ± 95% CI], Ca: 33.8 ± 16.3, Mg: 16.8 ± 4.2, K: 13.0 ± 5.6, Na:11.1 ± 3.0, and sum of base cations (BC): 61.2 ± 11.0; compiled data from watersheds, Ca: 82.8 ± 24.6, Mg: 50.8 ± 17.0, K: 7.8 ± 2.2, Na: 44.7 ± 12.8, and BC: 186.0 ± 49.9). Given the uncertainties associated with the calculations, there was little overall difference between total release rates and weathering release rates from soils for two of the three watersheds. 16.8 ± 4.2, K: 13.0 ± 5.6, Na:11.1 ± 3.0 et la somme des cations basiques (CB): 61.2 ± 11.0; compilation pour les bassins versants, Ca: 82.8 ± 24.6, Mg: 50.8 ± 17.0, K: 7.8 ± 2.2, Na: 44.7 ± 12.8, et CB: 186.0 ± 49.9). Étant donné les incertitudes associées au calculs, il y avait peu de différence globalement entre le taux de largage total et celui d'altération minérale de CB des sols de deux des trois bassins versants.

show abstract

Section: Uncertainties Associated With Wr Estimationsupporting

confidence: 79%

Section: Statistical and Sensitivity Analysesmentioning

confidence: 99%

Base cation mineral weathering and total release rates from soils in three calibrated forest watersheds on the Canadian Boreal Shield

Ouimet¹,

Duchesne²

2005

Can. J. Soil. Sci.

View full text Add to dashboard Cite

show abstract

“…These input variables have significant impacts on the model output because they determine the amount and type of weatherable surfaces available as well as the kinetics of the weathering reactions. Previous comparisons of the model's performance with independent estimations of weathering showed that the error associated with simulated WRs was below 40% for three Nordic sites in Sweden (Jönsson et al, 1995). Ouimet and Duchesne (2005) also compared different approaches for estimating WRs and concluded that PROFILE values were relatively similar with the values obtained with other approaches for three watersheds in the province of Quebec.…”

Section: Houle Et Al: Soil Weathering Rates In 21 Catchments Of Tmentioning

confidence: 92%

“…Other model inputs included, annual precipitation amounts and yearly averages of soil moisture content and temperature. Specific surface area was calculated from an algorithm developed by Jönsson et al (1995) from measured grain size distribution, dry bulk density, and coarse fragments. Partial pressure of CO 2 was estimated following the values used in Warfinge and .…”

Section: Simulation Of Weathering Rates With Profilementioning

confidence: 99%

Soil weathering rates in 21 catchments of the Canadian Shield

Houle

Lamoureux²,

Bélanger³

et al. 2012

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Soil mineral weathering represents an essential source of nutrient base cation (Ca, Mg and K) for forest growth in addition to provide a buffering power against precipitation acidity for soils and surface waters. Weathering rates of base cations were obtained for 21 catchments located within the temperate and the boreal forest of the Canadian Shield with the geochemical model PROFILE. Weathering rates ranged from 0.58 to 4.46 kmol c ha −1 yr −1 and their spatial variation within the studied area was mostly in agreement with spatial variations in soil mineralogy. Weathering rates of Ca and Mg were significantly correlated (r = 0.80 and 0.64) with their respective lake concentrations. Weathering rates of K and Na did not correlate with lake concentrations of K and Na. The modeled weathering rates for each catchment were also compared with estimations of net catchment exportations. The result show that modeled weathering rates of Ca were not significantly different than the net catchment exportations while modeled weathering rates of Mg were higher by 51 %. Larger differences were observed for K and Na weathering rates that were significantly different than net catchment exportations being 6.9 and 2.2 times higher than net exportations, respectively. The results for K were expected given its high reactivity with biotic compartments and suggest that most of the K produced by weathering reactions was retained within soil catchments and/or above ground biomass. This explanation does not apply to Na, however, which is a conservative element in forest ecosystems because of the insignificant needs of Na for soil microorganisms and above ground vegetations. It raises concern about the liability of the PROFILE model to provide reliable values of Na weathering rates. Overall, we concluded that the PROFILE model is powerful enough to reproduce spatial geographical gradients in weathering rates for relatively large areas as well as adequately predict absolute weathering rates values for the sum of base cations, Ca and Mg.

show abstract

“…For forest soil ecosystems, there is a most substantial uncertainty in the available data on A1 toxicity to trees (Abrahamsen, 1984;Asher, 1987;Berd6n et al, 1987;Boxman et al, 1988;Bossel et al, 1985;Ryan et al, 1986a, b;McCormac and Steiner, 1978;Steiner et al, 1978, Joslin and Wolfe, 1988, 1989Keltjens and van Loenen, 1989;Schulze et al, 1985;Smit et al, 1987;Sverdrup and Warfvinge, 1993;Ulrich et al, 1984;Huetterman and Ulrich, 1984). The general consensus is that a (Ca + Mg + K)/A1 molar ratio less than 1.0 may inhibit plant growth.…”

Section: Setting Chemical Criteria For Different Ecosystemsmentioning

confidence: 96%

Calculating critical loads for acidity with the simple mass balance method

Sverdrup¹,

Vries

1994

Water Air Soil Pollut

Self Cite

166

View full text Add to dashboard Cite

Abstract. The critical load for acid deposition to forest soils, groundwater and surface water can be calculated using a simple mass balance model, taking into account all sources of acidity and alkalinity in the system. The model is very simple to apply, and the major difficulty lies primarily in the estimation of reasonable values for the required input data such as the weathering rate. Methods for its estimation are indicated here. Examples are given for the application of the simple mass balance method (SMB) to Dutch and Swedish forest soils, lakes and shallow groundwater. This work outlines and explains the actual application of the consept as it is being carried out regionally for all European nations.

show abstract

Uncertainty in predicting weathering rate and environmental stress factors with the profile model

Cited by 60 publications

References 9 publications

Base cation mineral weathering and total release rates from soils in three calibrated forest watersheds on the Canadian Boreal Shield

Base cation mineral weathering and total release rates from soils in three calibrated forest watersheds on the Canadian Boreal Shield

Soil weathering rates in 21 catchments of the Canadian Shield

Calculating critical loads for acidity with the simple mass balance method

Contact Info

Product

Resources

About