Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
doi:10.5194/gmd-2017-62
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Model description paper
12 Apr 2017
Review status
This discussion paper is under review for the journal Geoscientific Model Development (GMD).
A representation of the phosphorus cycle for ORCHIDEE (revision 3985)
Daniel S. Goll1, Nicolas Vuichard1, Fabienne Maignan1, Albert Jornet-Puig1, Jordi Sardans2,3, Aurelie Violette4, Shushi Peng6, Yan Sun6, Marko Kvakic7, Matthieu Guimberteau1,8, Bertrand Guenet1, Soenke Zaehle5, Josep Peñuelas2,3, Ivan Janssens9, and Philippe Ciais1 1Le Laboratoire des Sciences du Climat et de l’Environnement, IPSL-LSCE CEA/CNRS/UVSQ Saclay, Gif sur Yvette, France
2CSIC, Global Ecology Unit CREAF-CSIC-UAB, 08193 Bellaterra, Catalonia, Spain
3CREAF, 08193 Cerdanyola del Vallés, Catalonia, Spain
4LMTG - Laboratoire des Mécanismes et Transfert en Géologie, Toulouse, France
5Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Jena 07701, Germany
6Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
7ISPA, Bordeaux Sciences Agro, INRA, 33140 Villenave d'Ornon, France
8Sorbonne Universités, UPMC, CNRS, EPHE - UMR7619 METIS, 75252 Paris, France
9Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
Abstract. Land surface models rarely incorporate the terrestrial phosphorus cycle and its interactions with the carbon cycle, despite the extensive scientific debate about the importance of nitrogen and phosphorus supply for future land carbon uptake. We describe a representation of the terrestrial phosphorus cycle for the land surface model ORCHIDEE, and evaluate it with data from nutrient manipulation experiments along a soil formation chronosequence in Hawaii.

ORCHIDEE accounts for influence of nutritional state of vegetation on tissue nutrient concentrations, photosynthesis, plant growth, biomass allocation, biochemical (phosphatase-mediated) mineralization and biological nitrogen fixation. Changes in nutrient content (quality) of litter affect the carbon use efficiency of decomposition and in return the nutrient availability to vegetation. The model explicitly accounts for root zone depletion of phosphorus as a function of root phosphorus uptake and phosphorus transport from soil to the root surface.

The model captures the observed differences in the foliage stoichiometry of vegetation between an early (300yr) and a late stage (4.1 Myr) of soil development. The contrasting sensitivities of net primary productivity to the addition of either nitrogen, phosphorus or both among sites are in general reproduced by the model. As observed, the model simulates a preferential stimulation of leaf level productivity when nitrogen stress is alleviated, while leaf level productivity and leaf area index are stimulated equally when phosphorus stress is alleviated. The nutrient use efficiencies in the model are lower as observed primarily due to biases in the nutrient content and turnover of woody biomass.

We conclude that ORCHIDEE is able to reproduce the shift from nitrogen to phosphorus limited net primary productivity along the soil development chronosequence, as well as the contrasting responses of net primary productivity to nutrient addition.


Citation: Goll, D. S., Vuichard, N., Maignan, F., Jornet-Puig, A., Sardans, J., Violette, A., Peng, S., Sun, Y., Kvakic, M., Guimberteau, M., Guenet, B., Zaehle, S., Peñuelas, J., Janssens, I., and Ciais, P.: A representation of the phosphorus cycle for ORCHIDEE (revision 3985), Geosci. Model Dev. Discuss., doi:10.5194/gmd-2017-62, in review, 2017.
Daniel S. Goll et al.
Daniel S. Goll et al.
Daniel S. Goll et al.

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Short summary
We describe a representation of the terrestrial phosphorus cycle for the land surface model ORCHIDEE. The model is able to reproduce the observed shift from nitrogen to phosphorus limited net primary productivity along a soil formation chronosequence in Hawaii, as well as the contrasting responses of net primary productivity to nutrient addition. However, the simulated nutrient use efficiencies are lower as observed primarily due to biases in the nutrient content and turnover of woody biomass.
We describe a representation of the terrestrial phosphorus cycle for the land surface model...
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