Soil Organic Carbon Changes in City Areas of China Over the Past Three Decades:Implications for Achieving Carbon Neutrality

The substantial amount of greenhouse gas emissions from anthropogenic activities has caused the global mean surface temperature to increase by 0.99℃ since the industrial revolution [1].China is committed to achieving carbon neutrality by 2060 in response to climate change [2]. Soil stores approximately 2344–3000 Pg (1015g) of carbon at depths of 0–100 cm in terrestrial ecosystems, an amount approximately equivalent to twice the amount in the atmospheric carbon pool and three times that in the terrestrial biomass; therefore, even a small change in soil carbon stocks will exert significant impacts on atmospheric CO2concentrations [3].