Articles | Volume 9, issue 2
https://doi.org/10.5194/gmd-9-841-2016
https://doi.org/10.5194/gmd-9-841-2016
Model experiment description paper
 | 
01 Mar 2016
Model experiment description paper |  | 01 Mar 2016

Towards a representation of priming on soil carbon decomposition in the global land biosphere model ORCHIDEE (version 1.9.5.2)

Bertrand Guenet, Fernando Esteban Moyano, Philippe Peylin, Philippe Ciais, and Ivan A Janssens

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Cited articles

Bell, J., Smith, J., Bailey, V., and Bolton, H.: Priming effect and C storage in semi-arid no-till spring crop rotations, Biol. Fert. Soils, 37, 237–244, 2003.
Bellamy, P. H., Loveland, P. J., Bradley, R. I., Lark, R. M., and Kirk, G. J. D.: Carbon losses from all soils across England and Wales 1978–2003, Nature, 437, 245–248, 2005.
Blagodatskaya, E. and Kuzyakov, Y.: Mechanisms of real and apparent priming effects and their dependence on soil microbial biomass and community structure: critical review, Biol. Fert. Soils, 45, 115–131, 2008.
Blagodatskaya, E. V., Blagodatsky, S. A., Anderson, T.-H., and Kuzyakov, Y.: Priming effects in chernozem induced by glucose and N in relation to microbial growth strategies, Appl. Soil Ecol., 37, 95–105, 2007.
Blagodatsky, S. A. and Richter, O.: Microbial growth in soil and nitrogen turnover: a theoretical model considering the activity state of microorganisms, Soil Biol. Biochem., 30, 1743–1755, 1998.
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We present a simple conceptual model of soil carbon decomposition (PRIM) able to reproduce priming experiments. Parameters were optimized using a Bayesian framework and evaluated against another set of soil incubation. PRIM better fit data than the original, CENTURY-type soil decomposition model. We then compared both models incorporated into the global land biosphere model ORCHIDEE. Both versions reproduced observed decay litter rates, but only ORCHIDEE-PRIM could simulate the observed priming.
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