Accumulation of soil carbon under elevated CO unaffected by warming and drought.

Elevated atmospheric CO concentration and climate change may substantially alter soil carbon (C) dynamics, which in turn may impact future climate through feedback cycles. However, only very few field experiments worldwide have combined elevated CO (eCO ) with both warming and changes in precipitation in order to study the potential combined effects of changes in these fundamental drivers of C cycling in ecosystems. We exposed a temperate heath/grassland to eCO , warming, and drought, in all combinations for 8 years.