Global terrestrial GPP increased 2% from 1951 to 2010 and continued increasing at least until 2016, with increased atmospheric CO2 showing a greater influence than natural factors . Global forest area increased 7% from 1982 to 2016, mainly from forest plantations and regrowth in boreal and temperate forests in Asia and Europe ; regrowth in secondary forests >20 years old, mainly in boreal, temperate and subtropical regions, generated a net removal of 7.7 Gt yr1 CO2 from the atmosphere from 2001 to 2019 . Vegetation growth that exceeds the modelled CO2 fertilisation, gaps in field data and incomplete knowledge of plant mortality and soil carbon responses introduce uncertainties into quantifying the magnitude of CO2 fertilisation . A combination of CO2 fertilisation of global vegetation and secondary forest regrowth has increased global vegetation productivity .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report