Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models
- 1System Dynamics, Department of Gamification, Inland Norway University of Applied Sciences, NO-2318, Hamar, Norway
- 2Earth Sciences, University College London, WC1E 6BT, London, UK
- 3CNRS, UMR-5563, Toulouse, France
- 4Institute of Hydrology, University of Uppsala, SE-751 05 Uppsala, Sweden
- 5Physical Geography, Stockholm University, SE-106 91 Stockholm, Sweden
- 6EKG Geoscience, CH-3012 Bern, Switzerland
- 7Earth Sciences, University of Lund, SE-221 00 Lund, Sweden
- 8Industrial Engineering, University of Iceland, IS-107 Reykjavik, Icleand
- 1System Dynamics, Department of Gamification, Inland Norway University of Applied Sciences, NO-2318, Hamar, Norway
- 2Earth Sciences, University College London, WC1E 6BT, London, UK
- 3CNRS, UMR-5563, Toulouse, France
- 4Institute of Hydrology, University of Uppsala, SE-751 05 Uppsala, Sweden
- 5Physical Geography, Stockholm University, SE-106 91 Stockholm, Sweden
- 6EKG Geoscience, CH-3012 Bern, Switzerland
- 7Earth Sciences, University of Lund, SE-221 00 Lund, Sweden
- 8Industrial Engineering, University of Iceland, IS-107 Reykjavik, Icleand
Abstract. Although the PROFILE and ForSAFE model can accurately reproduce the chemical and mineralogical evolution of the soil unsaturated zone, it overestimates weathering rates in deeper soil layers and in groundwater systems. This overestimation has been corrected by improving the kinetic expression describing mineral dissolution by adding or upgrading braking functions
. The base cation and aluminium brakes have been strengthened, and an additional silicate brake has been developed, improving the ability to describe mineral- water reactions in deeper soils. These brakes are developed from a molecular-level model of the dissolution mechanisms. Equations, parameters and constants describing mineral dissolution kinetics have now been obtained for 113 minerals from 12 major structural groups, comprising all types of minerals encountered in most soils. The PROFILE and ForSAFE weathering sub-model was extended to cover two-dimensional catchments, both in the vertical and the horizontal direction, including the hydrology. Comparisons between this improved model and field observations are available in Erlandsson Lampa et al. (2019, This special issue). The results showed that the incorporation of a braking effect of silica concentrations was necessary and helps obtain more accurate descriptions of soil evolution rates at greater depths and within the saturated zone.
Harald Ulrik Sverdrup et al.


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RC1: 'Review for Sverdrup et al.', Anonymous Referee #1, 12 Apr 2020
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AC1: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020
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AC1: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020
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RC2: 'Comment on paper bg-2019-464 "Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models', Anonymous Referee #2, 13 Apr 2020
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AC2: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020
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AC2: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020


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RC1: 'Review for Sverdrup et al.', Anonymous Referee #1, 12 Apr 2020
-
AC1: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020
-
AC1: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020
-
RC2: 'Comment on paper bg-2019-464 "Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models', Anonymous Referee #2, 13 Apr 2020
-
AC2: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020
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AC2: 'Answer to Interactive comment on “Improved parameterization of the weathering kinetics module in the PROFILE and ForSAFE models” by Harald Ulrik Sverdrup et al.', Harald Ulrik Sverdrup, 31 May 2020
Harald Ulrik Sverdrup et al.
Harald Ulrik Sverdrup et al.
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