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A new scheme for initializing process-based ecosystem models by scaling soil carbon pools

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  • Hashimoto, S.
  • Wattenbach, M.
  • Smith, P.

Abstract

Process-based ecosystem models are useful tools, not only for understanding the forest carbon cycle, but also for predicting future change. In order to apply a model to simulate a specific time period, model initialization is required. In this study, we propose a new scheme of initialization for forest ecosystem models, which we term a “slow-relaxation scheme”, that entails scaling of the soil carbon and nitrogen pools slowly during the spin-up period. The proposed slow-relation scheme was tested with the CENTURY version 4 ecosystem model. Three different combinations of scaled soil pools were also tested, and compared to the results from a fast-relaxation regime. The fast-relaxation of soil pools produced unstable, transient model behaviour whereas slow-relaxation overcame this instability. This approach holds promise for initializing ecosystem models, and for starting simulations with more realistic initial conditions.

Suggested Citation

  • Hashimoto, S. & Wattenbach, M. & Smith, P., 2011. "A new scheme for initializing process-based ecosystem models by scaling soil carbon pools," Ecological Modelling, Elsevier, vol. 222(19), pages 3598-3602.
    • Handle: RePEc:eee:ecomod:v:222:y:2011:i:19:p:3598-3602
    DOI: 10.1016/j.ecolmodel.2011.08.011
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    Cited by:

    1. Lo, Yueh-Hsin & Blanco, Juan A. & Canals, Rosa M. & González de Andrés, Ester & San Emeterio, Leticia & Imbert, J. Bosco & Castillo, Federico J., 2015. "Land use change effects on carbon and nitrogen stocks in the Pyrenees during the last 150 years: A modeling approach," Ecological Modelling, Elsevier, vol. 312(C), pages 322-334.
    2. Wong, H. & Hillier, J. & Clark, D.B. & Smith, J. & Smith, P., 2013. "An explicit and computationally efficient method to initialise first-order-based soil organic matter models—The Geometric Series Solution (GSS)," Ecological Modelling, Elsevier, vol. 267(C), pages 48-53.

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