Global database and model on dissolved carbon in soil solution
- 1Department of Earth Sciences - Geochemistry, Faculty of Geosciences, Utrecht University, P.O. Box 80021, 3508TA Utrecht, the Netherlands
- 2PBL Netherlands Environmental Assessment Agency, P.O. Box 30314, 2500GH the Hague, the Netherlands
- 3Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, PR China
- 4Department of Industrial Ecology, Leiden University, P.O. Box 9518, 2300RA Leiden, the Netherlands
- 1Department of Earth Sciences - Geochemistry, Faculty of Geosciences, Utrecht University, P.O. Box 80021, 3508TA Utrecht, the Netherlands
- 2PBL Netherlands Environmental Assessment Agency, P.O. Box 30314, 2500GH the Hague, the Netherlands
- 3Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, PR China
- 4Department of Industrial Ecology, Leiden University, P.O. Box 9518, 2300RA Leiden, the Netherlands
Abstract. Abstract. Dissolved carbon leaching in and from soils plays an important role in C transport along the terrestrial-aquatic continuum. However, a global overview and analysis of dissolved carbon in soil solutions, covering a wide range of vegetation types and climates, is lacking. We compiled a global database on annual average dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) in soil solutions, including potential governing factors, with 762 entries from 351 different sites covering a range of climate zones, land cover types and soil classes. Using this database we develop regression models to calculate topsoil concentrations, and concentrations vs. depth in the subsoil at the global scale. For DIC, the lack of a proportional globally distributed cover inhibits analysis on a global scale. For DOC, annual average concentrations range from 1.7 to 88.3 (median = 25.27) mg C/L for topsoils and from 0.42 to 372.1 (median = 5.50) mg C/L for subsoils (excluding lab incubations). Highest topsoil values occur in forests of cooler, humid zones. In topsoils, multiple regression showed that precipitation is the most significant factor. Our global topsoil DOC model (R2 = 0.36) uses precipitation, soil class, climate zone and land cover type as model factors. Our global subsoil model describes DOC concentrations vs. depth for different USDA soil classes (overall R2 = 0.45). Highest subsoil concentrations are calculated for Histosols.
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Joep Langeveld et al.
Interactive discussion


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SC1: 'SC: global database of soil DOC', Zeli Tan, 01 Jul 2019
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AC1: 'Reaction to 'Zeli Tan, 01 Jul 2019'', Joep Langeveld, 02 Sep 2019
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AC1: 'Reaction to 'Zeli Tan, 01 Jul 2019'', Joep Langeveld, 02 Sep 2019
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RC1: 'Review comments on bg-2019-238', Anonymous Referee #1, 15 Jul 2019
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AC2: 'Reaction to 'Anonymous Referee #1, 15 Jul 2019'', Joep Langeveld, 02 Sep 2019
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AC2: 'Reaction to 'Anonymous Referee #1, 15 Jul 2019'', Joep Langeveld, 02 Sep 2019
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RC2: 'Comments on ‘Global database and model on dissolved carbon in soil solution’ by Joep Langeveld et al.', Anonymous Referee #2, 20 Jul 2019
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AC3: 'Reaction to 'Anonymous Referee #2, 20 Jul 2019'', Joep Langeveld, 02 Sep 2019
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AC3: 'Reaction to 'Anonymous Referee #2, 20 Jul 2019'', Joep Langeveld, 02 Sep 2019
Interactive discussion


-
SC1: 'SC: global database of soil DOC', Zeli Tan, 01 Jul 2019
-
AC1: 'Reaction to 'Zeli Tan, 01 Jul 2019'', Joep Langeveld, 02 Sep 2019
-
AC1: 'Reaction to 'Zeli Tan, 01 Jul 2019'', Joep Langeveld, 02 Sep 2019
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RC1: 'Review comments on bg-2019-238', Anonymous Referee #1, 15 Jul 2019
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AC2: 'Reaction to 'Anonymous Referee #1, 15 Jul 2019'', Joep Langeveld, 02 Sep 2019
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AC2: 'Reaction to 'Anonymous Referee #1, 15 Jul 2019'', Joep Langeveld, 02 Sep 2019
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RC2: 'Comments on ‘Global database and model on dissolved carbon in soil solution’ by Joep Langeveld et al.', Anonymous Referee #2, 20 Jul 2019
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AC3: 'Reaction to 'Anonymous Referee #2, 20 Jul 2019'', Joep Langeveld, 02 Sep 2019
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AC3: 'Reaction to 'Anonymous Referee #2, 20 Jul 2019'', Joep Langeveld, 02 Sep 2019
Joep Langeveld et al.
Joep Langeveld et al.
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