ORCID: https://orcid.org/0000-0003-0372-3960
(2017):
Input-driven versus turnover-driven controls of simulated changes in soil carbon due to land-use change.
In: Environmental Research Letters, Vol. 12, No. 8, 084015
Abstract
Historical changes in soil carbon associated with land-use change (LUC) result mainly from the changes in the quantity of litter inputs to the soil and the turnover of carbon in soils. We use a factor separation technique to assess how the input-driven and turnover-driven controls, as well as their synergies, have contributed to historical changes in soil carbon associated with LUC. We apply this approach to equilibrium simulations of present-day and pre-industrial land use performed using the dynamic global vegetation model JSBACH. Our results show that both the input-driven and turnover-driven changes generally contribute to a gain in soil carbon in afforested regions and a loss in deforested regions. However, in regions where grasslands have been converted to croplands, we find an input-driven loss that is partly offset by a turnover-driven gain, which stems from a decrease in the fire-related carbon losses. Omitting land management through crop and wood harvest substantially reduces the global losses through the input-driven changes. Our study thus suggests that the dominating control of soil carbon losses is via the input-driven changes, which are more directly accessible to human management than the turnover-driven ones.
Item Type: | Journal article |
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Keywords: | factor separation;input-driven;land-use change;soil carbon changes;turnover-driven |
Faculties: | Geosciences > Department of Geography > Physical Geography and Land Use Systems |
Subjects: | 900 History and geography > 910 Geography and travel |
ISSN: | 1748-9326 |
Language: | English |
Item ID: | 68528 |
Date Deposited: | 22. Aug 2019, 11:34 |
Last Modified: | 04. Nov 2020, 13:50 |