title: The whole-soil carbon flux in response to warming.
abstract: 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 CO2production 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.
authors.affiliation: Climate Sciences Department, Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. cehpries@lbl.gov mstorn@lbl.gov.
authors.forename: Caitlin E
authors.identifier: 0000-0003-0813-2211
authors.initials: CE
authors.lastname: Hicks Pries
authors.affiliation: Climate Sciences Department, Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: C
authors.identifier: 0000-0001-7327-5169
authors.initials: C
authors.lastname: Castanha
authors.affiliation: Climate Sciences Department, Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors.forename: R C
authors.initials: RC
authors.lastname: Porras
authors.affiliation: Climate Sciences Department, Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. cehpries@lbl.gov mstorn@lbl.gov.|Energy and Resources Group, University of California, Berkeley, CA 94720, USA.
authors.forename: M S
authors.identifier: 0000-0002-8174-0099
authors.initials: MS
authors.lastname: Torn