Articles | Volume 11, issue 12
Geosci. Model Dev., 11, 4711–4726, 2018
https://doi.org/10.5194/gmd-11-4711-2018
Geosci. Model Dev., 11, 4711–4726, 2018
https://doi.org/10.5194/gmd-11-4711-2018

Development and technical paper 29 Nov 2018

Development and technical paper | 29 Nov 2018

The use of radiocarbon 14C to constrain carbon dynamics in the soil module of the land surface model ORCHIDEE (SVN r5165)

Marwa Tifafi et al.

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Cited articles

Ahrens, B., Braakhekke, M. C., Guggenberger, G., Schrumpf, M., and Reichstein, M.: Contribution of sorption, DOC transport and microbial interactions to the 14C age of a soil organic carbon profile: Insights from a calibrated process model, Soil Biol. Biochem., 88, 390–402, https://doi.org/10.1016/j.soilbio.2015.06.008, 2015. 
Balesdent, J. and Guillet, B.: Les datations par le 14C des matières organiques des sols. Contribution à l'étude de l'humification et du renouvellement des substances humiqueétriques, Sci. du sol, 2, 93–111, 1982. 
Balesdent, J., Basile-Doelsch, I., Chadoeuf, J., Cornu, S., Derrien, D., Fekiacova, Z., and Hatté, C.: Atmosphere–soil carbon transfer as a function of soil depth, Nature, 23, 599–602, https://doi.org/10.1038/s41586-018-0328-3, 2018. 
Barré, P., Berger, G., and Velde, B.: How element translocation by plants may stabilize illitic clays in the surface of temperate soils, Geoderma, 151, 22–30, https://doi.org/10.1016/j.geoderma.2009.03.004, 2009. 
Braakhekke, M., Beer, C., Schrumpf, M., Ekici, A., Ahrens, B., Hoosbeek, M. R., Kruijt, B., Kabat, P., and Reichstein, M.: The use of radiocarbon to constrain current and future soil organic matter turnover and transport in a temperate forest, J. Geophys. Res.-Biogeo., 372–391, https://doi.org/10.1002/2013JG002420, 2014. 
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Short summary
The role of soil carbon in climate dynamics becomes one of the major uncertainties in land surface models. This work is a presentation of a new version of the land surface model called ORCHIDEE incorporating the radiocarbon (14C) used as integrator of the soil carbon dynamics. It has been possible to highlight an underestimation of the age of carbon in the soil and that model improvements should focus more on a depth-dependent parameterization mainly for the diffusion.