Faster decomposition under increased atmospheric CO2 limits soil carbon storage

Kees Jan Van Groenigen, Xuan Qi, Craig W. Osenberg, Yiqi Luo, Bruce A. Hungate

Research output: Contribution to journalArticlepeer-review

278 Scopus citations


Soils contain the largest pool of terrestrial organic carbon (C) and are a major source of atmospheric carbon dioxide (CO2). Thus, they may play a key role in modulating climate change. Rising atmospheric CO2 is expected to stimulate plant growth and soil C input but may also alter microbial decomposition. The combined effect of these responses on long-term C storage is unclear. Combining meta-analysis with data assimilation, we show that atmospheric CO2 enrichment stimulates both the input (+19.8%) and the turnover of C in soil (+16.5%). The increase in soil C turnover with rising CO2 leads to lower equilibrium soil C stocks than expected from the rise in soil C input alone, indicating that it is a general mechanism limiting C accumulation in soil.

Original languageEnglish (US)
Pages (from-to)508-509
Number of pages2
Issue number6183
StatePublished - 2014

ASJC Scopus subject areas

  • General


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