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Measured and modelled retention of inorganic sulfur in soils and subsoils (Harz Mountains, Germany)

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Lükewille, Anke ; Malessa, Volker ; Alewell, Christine:
Measured and modelled retention of inorganic sulfur in soils and subsoils (Harz Mountains, Germany).
In: Water, Air, & Soil Pollution. Bd. 85 (1995) Heft 2 . - S. 683-688.
ISSN 1573-2932
DOI: https://doi.org/10.1007/BF00476908

Abstract

Atmospheric deposition has resulted in an accumulation of inorganic sulfur (S) in many forestsoils. At S6semulde (Harz Mountains) samples from 5-240 cm depth were analysed. Most sulfate (SO4) isaccumulated at about 30-60 cm depth: 8.5-9.5 mmoI c kg -1. Large amounts can also be retained in > 100 cm.To assess changes in SO 4 dynamics in time,adsorption isotherms have been included in several processorientedmodels, e.g., in MAGIC. The Lange Bramke (LB) Model is the first model used on the catchmentscale containing solubility products for the hydroxosulfate minerals jurbanite and alunite. By reconstructingthe long-term acidification history (140 years) both models were successfully calibrated to a 14-yeardeposition, soil and streamwater data set at Lange Bramke catchment (Harz Mountains). According toMAGIC the present accumulation of SO 4 in 0 - 80 cm is 8.7 mmol c kg 1, while according to the LB-Model10.2 rnmol e kg -1 are stored as jurbanite. Both models predicted 4.5 mmol c kg -I SO 4 in the subsoil layer,retained as alunite in the LB Model. These values correspond to the amounts measured in soil and subsoilsamples at S6semulde, respectively. However, for future scenarios with decreasing S inputs the models showdifferent developments in SO 4 concentrations. Changes in MAGIC are gradual whereas the LB modelpredicts stepwise decreasing SO 4 values as soon as previously stored hydroxosulfates are fully dissolved.Such concentration "jumps" have not been observed.Keywords: sulfur sorption, long-term acidification, sulfate adsorption, hydroxosulfateminerals, modeling, future scenarios

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER6977
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 22 Okt 2015 07:29
Letzte Änderung: 10 Apr 2018 12:32
URI: https://eref.uni-bayreuth.de/id/eprint/20772