11:00 AM - 11:15 AM
[ACG35-02] The role of plant regrowth in recent enhancement of terrestrial carbon uptake
Keywords:carbon budget, plant regrowth, land use change
Here using an ensemble of biosphere models, we show a decadal-scale carbon uptake enhancement is induced not only by CO2 fertilization, but also an increasing uptake by plant regrowth from past land use changes (LUC), with its effect most pronounced in eastern North America, southern and eastern Europe, and southeastern temperate Eurasia. Our analysis indicates that ecosystems in North America and Europe have established the current productive state through regrowth over a half-century, and those in temperate Eurasia are still in a recovering stage from active LUC in the 1980s. As the strength of model representation of CO2 fertilization is still in debate, plant regrowth might have a greater potential to sequester carbon than indicated by this study.