Significant loss of soil inorganic carbon at the continental scale.

ABSTRACT: Widespread soil acidification due to atmospheric acid deposition and agricultural fertilization may greatly accelerate soil carbonate dissolution and CO₂ release. However, to date, few studies have addressed these processes. Here, we use meta-analysis and nationwide-survey datasets to investigate changes in soil inorganic carbon (SIC) stocks in China. We observe an overall decrease in SIC stocks in topsoil (0-30 cm) (11.33 g C m^-2 yr^-1) from the 1980s to the 2010s. Total SIC stocks have decreased by ∼8.99 ± 2.24% (1.37 ± 0.37 Pg C). The average SIC losses across China (0.046 Pg C yr^-1) and in cropland (0.016 Pg C yr^-1) account for ∼17.6%-24.0% of the terrestrial C sink and 57.1% of the soil organic carbon sink in cropland, respectively

SUBMITTER: Song XD 

PROVIDER: S-EPMC8824702 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature