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Testing climate models using an impact model: what are the advantages?

Author

Listed:
  • Marc Stéfanon
  • Nicolas Martin-StPaul
  • Paul Leadley
  • Sophie Bastin
  • Alessandro Dell’Aquila
  • Philippe Drobinski
  • Clemente Gallardo

Abstract

Global and regional climate model (GCM and RCM) outputs are often used as climate forcing for ecological impact models, and this potentially results in large cumulative errors because information and error are passed sequentially along the modeling chain from GCM to RCM to impact model. There are also a growing number of Earth system modeling platforms in which climate and ecological models are dynamically coupled, and in this case error amplification due to feedbacks can lead to even more serious problems. It is essential in both cases to rethink the organization of evaluation which typically relies on independent validation at each successive step, and to rely more heavily on analyses that cover the full modeling chain and thus require stronger interactions between climate and impact modelers. In this paper, we illustrate the benefits of using impact models as an additional source of information for evaluating climate models. Four RCMs that are part of the HyMeX (Hydrological cycle in Mediterranean EXperiment) and Mediterranean CORDEX projects (MED-CORDEX) were tested with observed climatology and a process-based model of European beech (Fagus sylvatica L.) tree growth and forest ecosystem functioning that has been rigorously validated. This two part analysis i) indicates that evaluation of RCMs on climate variables alone may be insufficient to determine the suitability of RCMs for studies of climate-forest interactions and ii) points to areas of improvement in these RCMs that would improve impact studies or behavior in coupled climate-ecosystem models over the spatial domain studied. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • Marc Stéfanon & Nicolas Martin-StPaul & Paul Leadley & Sophie Bastin & Alessandro Dell’Aquila & Philippe Drobinski & Clemente Gallardo, 2015. "Testing climate models using an impact model: what are the advantages?," Climatic Change, Springer, vol. 131(4), pages 649-661, August.
    • Handle: RePEc:spr:climat:v:131:y:2015:i:4:p:649-661
    DOI: 10.1007/s10584-015-1412-4
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    References listed on IDEAS

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    1. Tobias Lung & Alessandro Dosio & William Becker & Carlo Lavalle & Laurens Bouwer, 2013. "Assessing the influence of climate model uncertainty on EU-wide climate change impact indicators," Climatic Change, Springer, vol. 120(1), pages 211-227, September.
    2. Davi, H. & Barbaroux, C. & Dufrêne, E. & François, C. & Montpied, P. & Bréda, N. & Badeck, F., 2008. "Modelling leaf mass per area in forest canopy as affected by prevailing radiation conditions," Ecological Modelling, Elsevier, vol. 211(3), pages 339-349.
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    Cited by:

    1. M. Ruiz-Ramos & A. Rodríguez & A. Dosio & C. Goodess & C. Harpham & M. Mínguez & E. Sánchez, 2016. "Comparing correction methods of RCM outputs for improving crop impact projections in the Iberian Peninsula for 21st century," Climatic Change, Springer, vol. 134(1), pages 283-297, January.
    2. Getachew Tegegne & Assefa M. Melesse, 2020. "Multimodel Ensemble Projection of Hydro-climatic Extremes for Climate Change Impact Assessment on Water Resources," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 34(9), pages 3019-3035, July.
    3. Juan F. Fernández-Manjarrés & Paloma Ruiz-Benito & Miguel A. Zavala & J. Julio Camarero & Fernando Pulido & Vânia Proença & Laetitia Navarro & Roxane Sansilvestri & Elena Granda & Laura Marqués & Mart, 2018. "Forest Adaptation to Climate Change along Steep Ecological Gradients: The Case of the Mediterranean-Temperate Transition in South-Western Europe," Sustainability, MDPI, vol. 10(9), pages 1-18, August.

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