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Long-Term Sulfate Dynamics at Lange Bramke (Harz) used for testing two Acidification Models

Title data

Lange, Holger ; Hauhs, Michael ; Schmidt, Susanne:
Long-Term Sulfate Dynamics at Lange Bramke (Harz) used for testing two Acidification Models.
In: Water, Air, & Soil Pollution. Vol. 79 (1995) Issue 1-4 . - pp. 339-351.
ISSN 0049-6979
DOI: https://doi.org/10.1007/BF01100446

Abstract in another language

At Lange Bramke (Harz) soil solution and runoff concentrations of major elements were observed over 16 yr. During this period acid deposition was high but showed a marked decrease of H+ and SO4 2- both in concentrations and fluxes over the last five years. Among others, this record reveals the following patterns: seasonality in the signals for SO4 2+ and NO3- in runoff which are synchronous; an accumulation of SO4 2- in the soil, initially up to 50% of the deposition fluxes; apparently no correlation between runoff and SO4 2- concentration, and no long-term trend in runoff concentration of SO4 2- .In this paper we use these patterns in the data set from Lange Bramke to test two established acidification models. The test criterion is that the algorithms employed by the SO4 2- modules of these models must be able to reproduce these features. To that end, both models need not to be run as it can be shown that even with completely unrestricted parameter values the two algorithms are unable to match the observed SO4 2- dynamics. The MAGIC model (Cosby et al. 1985) is unable to reproduce, given the existence of net SO4 2- accumulation, the constant SO4 2- concentration in runoff during the last 16 years. The second model, BEM (Prenzel, 1986), is succesful in reconstructing the constant SO4 2- levels in runoff. However, on a monthly time scale BEM predicts a shift between the periodic maximum concentrations of SO4 2- and NO3- which is not observed in the data.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER6964
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Ecological Modelling
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Ecological Modelling > Chair Ecological Modelling - Univ.-Prof. Dr. Michael Hauhs
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 09 Oct 2015 05:57
Last Modified: 16 Dec 2016 14:30
URI: https://eref.uni-bayreuth.de/id/eprint/20324