de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Long-term sensitivity of soil carbon turnover to warming

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons62440

Knorr,  W.
Department Biogeochemical Synthesis, Prof. C. Prentice, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62515

Prentice,  I. C.
Department Biogeochemical Synthesis, Prof. C. Prentice, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62416

House,  J. I.
Department Biogeochemical Synthesis, Prof. C. Prentice, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62414

Holland,  E. A.
Research Group Bioathmospheric Chemistry, Dr. E. Holland, Max Planck Institute for Biogeochemistry, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Knorr, W., Prentice, I. C., House, J. I., & Holland, E. A. (2005). Long-term sensitivity of soil carbon turnover to warming. Nature, 433(7023), 298-301.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-D30D-8
Abstract
The sensitivity of soil carbon to warming is a major uncertainty in projections of carbon dioxide concentration and climate(1). Experimental studies overwhelmingly indicate increased soil organic carbon (SOC) decomposition(2-8) at higher temperatures, resulting in increased carbon dioxide emissions from soils. However, recent findings have been cited as evidence against increased soil carbon emissions in a warmer world(9,10). In soil warming experiments, the initially increased carbon dioxide efflux returns to pre-warming rates within one to three years(10-14), and apparent carbon pool turnover times are insensitive to temperature(15). It has already been suggested that the apparent lack of temperature dependence could be an artefact due to neglecting the extreme heterogeneity of soil carbon(16), but no explicit model has yet been presented that can reconcile all the above findings. Here we present a simple three-pool model that partitions SOC into components with different intrinsic turnover rates. Using this model, we show that the results of all the soil-warming experiments are compatible with long-term temperature sensitivity of SOC turnover: they can be explained by rapid depletion of labile SOC combined with the negligible response of non-labile SOC on experimental timescales. Furthermore, we present evidence that non-labile SOC is more sensitive to temperature than labile SOC, implying that the long-term positive feedback of soil decomposition in a warming world may be even stronger than predicted by global models(1,17-20). [References: 30]