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Modelling geochemistry and Lake pH since glaciation at Lake Gårdsjön

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Abstract

The soil acidification model SAFE was modified to calculate historical changes in geochemistry and runoff since the last glaciation ended at the Lake Gårdsjön F1 catchment 12 000 B.P. Changes in runoff pH and ANC, soil weathering rate, soil mineralogy, soil texture and base saturation was also calculated. The changes in mineralogy compared favorable to data. Modeled historic weathering rates were slightly higher than data suggest, while present weathering rate was somewhat to low, 37 mmolc m−2 yr−1. The weathering rate was very high immediately after the last glaciation, and decreased as the smaller particles were consumed by weathering. The calculated runoff pH follows the pattern of the paleo-inferred pH. SAFE suggests a natural depletion of base cations in the C-layer.

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Authors and Affiliations

  1. Chemical Engineering II, Lund University, P.O. Box 124, S-221 00, Lund, Sweden

    P. Warfvinge, H. Sverdrup, M. Alveteg & F. Rietz

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  1. P. Warfvinge
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  2. H. Sverdrup
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  3. M. Alveteg
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  4. F. Rietz
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Warfvinge, P., Sverdrup, H., Alveteg, M. et al. Modelling geochemistry and Lake pH since glaciation at Lake Gårdsjön. Water Air Soil Pollut 85, 713–718 (1995). https://doi.org/10.1007/BF00476913

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  • DOI: https://doi.org/10.1007/BF00476913

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