Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/gmd-2017-122
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Model evaluation paper
16 Jun 2017
Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Geoscientific Model Development (GMD).
ORCHIDEE-MICT (revision 4126), a land surface model for the high-latitudes: model description and validation
Matthieu Guimberteau1,*, Dan Zhu1,*, Fabienne Maignan1, Ye Huang1, Chao Yue1, Sarah Dantec-Nédélec1, Catherine Ottlé1, Albert Jornet-Puig1, Ana Bastos1, Pierre Laurent1, Daniel Goll1, Simon Bowring1, Jinfeng Chang2, Bertrand Guenet1, Marwa Tifafi1, Shushi Peng1,3, Gerhard Krinner4, Agnès Ducharne5, Fuxing Wang6, Tao Wang7,8, Xuhui Wang1,9, Yilong Wang1, Zun Yin1, Ronny Lauerwald10,1,11, Emilie Joetzjer1,12, Chunjing Qiu1, Hyungjun Kim13, and Philippe Ciais1 1Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA – CNRS – UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
2Sorbonne Universités (UPMC), CNRS-IRD-MNHN, LOCEAN/IPSL, 4 place Jussieu, 75005 Paris, France
3Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
4CNRS, Univ. Grenoble Alpes, Institut des Géosciences de l'Environnement (IGE), 38000 Grenoble, France
5UMR 7619 METIS, Sorbonne Universités, UPMC, CNRS, EPHE, 4 place Jussieu, 75005 Paris, France
6Laboratoire de Météorologie Dynamique, Ecole Polytechnique, F 91128 Palaiseau, France
7Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China
8CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100085, China
9Laboratoire de Météorologie Dynamique, Université Pierre et Marie Curie, 75005 Paris, France
10Université Libre de Bruxelles, Belgium
11University of Exeter, Exeter, United Kingdom
12CNRS, Université Paul Sabatier, ENFA; UMR5174 EDB (Laboratoire Evolution et Diversité Biologique), 118 route de Narbonne, Toulouse F-31062, France
13Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
*These authors contributed equally to this work.
Abstract. The high-latitude regions of the northern hemisphere are a nexus for the interaction between land surface physical properties and their exchange of carbon and energy with the atmosphere. At these latitudes, two carbon pools of planetary significance – those of the permanently frozen soils (permafrost), and of the great expanse of boreal forest – are vulnerable to destabilization in the face of currently observed climatic warming, the speed and intensity of which are expected to increase with time. Improved projections of future Arctic and boreal ecosystem transformation require improved land surface models that integrate processes specific to these cold biomes. To this end, this study lays out relevant new parameterizations in the ORCHIDEE-MICT land surface model. These describe the interactions between soil carbon, soil temperature and hydrology, and their resulting feedbacks on water and CO2 fluxes, in addition to a recently-developed fire module. Outputs from ORCHIDEE-MICT, when forced by two climate input data sets, are extensively evaluated against: (i) temperature gradients between the atmosphere and deep soils; (ii) the hydrological components comprising the water balance of the largest high-latitude basins, and (iii) CO2 flux and carbon stock observations. The model performance is good with respect to empirical data, despite a simulated excessive plant water stress and a positive land surface temperature bias. In addition, acute model sensitivity to the choice of input forcing data suggests that the calibration of model parameters is strongly forcing-dependent. Overall, we suggest that this new model design is at the forefront of current efforts to reliably estimate future perturbations to the high-latitude terrestrial environment.

Citation: Guimberteau, M., Zhu, D., Maignan, F., Huang, Y., Yue, C., Dantec-Nédélec, S., Ottlé, C., Jornet-Puig, A., Bastos, A., Laurent, P., Goll, D., Bowring, S., Chang, J., Guenet, B., Tifafi, M., Peng, S., Krinner, G., Ducharne, A., Wang, F., Wang, T., Wang, X., Wang, Y., Yin, Z., Lauerwald, R., Joetzjer, E., Qiu, C., Kim, H., and Ciais, P.: ORCHIDEE-MICT (revision 4126), a land surface model for the high-latitudes: model description and validation, Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2017-122, in review, 2017.
Matthieu Guimberteau et al.
Matthieu Guimberteau et al.
Matthieu Guimberteau et al.

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