Process-oriented analysis of dominant sources of uncertainty in the land carbon sink.
Where this comes from
- Record sourced from PubMed, PMID 35970991.
- Also identified by DOI 10.1038/s41467-022-32416-8 and PMC identifier 9378641.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The observed global net land carbon sink is captured by current land models. All models agree that atmospheric CO<sub>2</sub> 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 CO<sub>2</sub> (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 ~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.
Medical subject headings
- Carbon Dioxide
- Carbon Sequestration