Abstract
The observed global net land carbon sink is captured by current land models. All models agree that atmospheric CO2 and nitrogen deposition driven gains in carbon stocks are partially offset by climate and land-use and land-cover change (LULCC) losses. However, there is a lack of consensus in the partitioning of the sink between vegetation and soil, where models do not even agree on the direction of change in carbon stocks over the past 60 years. This uncertainty is driven by plant productivity, allocation, and turnover response to atmospheric CO2 (and to a smaller extent to LULCC), and the response of soil to LULCC (and to a lesser extent climate). Overall, differences in turnover explain similar to 70% of model spread in both vegetation and soil carbon changes. Further analysis of internal plant and soil (individual pools) cycling is needed to reduce uncertainty in the controlling processes behind the global land carbon sink.
Item Type: | Journal article |
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Faculties: | Geosciences > Department of Geography > Physical Geography and Land Use Systems |
Subjects: | 500 Science > 550 Earth sciences and geology |
Language: | English |
Item ID: | 110703 |
Date Deposited: | 02. Apr 2024, 07:20 |
Last Modified: | 02. Apr 2024, 07:20 |