Details

Autor(en) / Beteiligte

• Pries, Caitlin E. Hicks
• Castanha, C.
• Porras, R. C.
• Torn, M. S.

Titel

The whole-soil carbon flux in response to warming

Ist Teil von

• Science (American Association for the Advancement of Science), 2017-03, Vol.355 (6332), p.1420-1423

Ort / Verlag

United States: American Association for the Advancement of Science

Erscheinungsjahr

2017

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• Soil organic carbon harbors three times as much carbon as Earth’s atmosphere, and its decomposition is a potentially large climate change feedback and major source of uncertainty in climate projections. The response of whole-soil profiles to warming has not been tested in situ. In a deep warming experiment in mineral soil, we found that CO₂ production from all soil depths increased with 4°C warming; annual soil respiration increased by 34 to 37%. All depths responded to warming with similar temperature sensitivities, driven by decomposition of decadal-aged carbon. Whole-soil warming reveals a larger soil respiration response than many in situ experiments (most of which only warm the surface soil) and models.