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Padrón et al. 2022 Drivers of intermodel uncertainty in land carbon sink projections https://bg.copernicus.org/articles/19/5435/2022/bg-19-5435-2022.html
Qiu et al. 2022 Global and Northern-High-Latitude Terrestrial carbon sinks in the 21st century from CMIP6 experiments https://egusphere.copernicus.org/preprints/2022/egusphere-2022-417/
On average, the ten CMIP6 models indicate a strong global terrestrial ecosystem carbon sink (positive NEPs) of 4.48 ± 0.54 Pg C/year (annual mean ± interannual standard deviation) during the historical period, with a large spread across individual models (Fig S1). As a benchmark, the estimates from the GCP show the global terrestrial ecosystems as a consistent carbon sink during the historical 150 period at 2.43 ± 0.97 Pg C/year, which is lower than the model ensemble mean.
The average SD for global NEP over the historical period was 2.85 PgC/year
Hardouin et al. 2022 Uncertainty in land carbon budget simulated by terrestrial biosphere models: the role of atmospheric forcing https://iopscience.iop.org/article/10.1088/1748-9326/ac888d/meta