EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Can we reach a sensible balance between generality of model parameters and accuracy of simulations?

Katarina Merganicova1, Laura Dobor1, Roland Hollos2, Ján Merganič3, Zoltán Barcza1,2,4, Daniel Kurjak3, Jiri Novák5, Zuzana Sitková6, Peter Fleischer3, Hrvoje Marjanovic7, Dóra Hidy4, Katarína Střelcová3, and Tomáš Hlásny1
Katarina Merganicova et al.
  • 1Czech University of Life Sciences Prague, Faculty of Forestry and Wood Sciences, Kamýcká 129, 16500 Praha 6 – Suchdol, Czech Republic (
  • 2Eötvös Loránd University, Department of Meteorology, Pázmány P. sétány 1/A, H-1117 Budapest, Hungary
  • 3Technical University in Zvolen, Faculty of Forestry, T. G. Masaryka 24, 960 53 Zvolen, Slovak Republic
  • 4Eötvös Loránd University, Faculty of Science, Excellence Center, Brunszvik u. 2., H-2462 Martonvásár, Hungary
  • 5Forestry and Game Management Research Institute, Opočno, Czech Republic
  • 6National Forest Centre - Forest Research Institute Zvolen, T. G. Masaryka 2175/22, SK – 960 92 Zvolen, Slovak Republic
  • 7Croatian Forests Research Institute, Department for Forest Management and Forestry Economics Trnjanska c. 35, 10000 Zagreb, Croatia

Process-based ecosystem models are versatile tools providing profound insights into ecosystem processes and interactions between vegetation and environment. The ongoing development of the Biome-BGCMuSo model has delivered multiple improvements in model structure and parameters, and subsequently in simulated ecosystem dynamics. Since the number of parameters has increased during the model development, model parametrisation for biomes or tree species of interest is required to enable reliable model usage in the future.

Here we explore the issue of site-specific versus multi-site calibration of model parameters for the European beech (Fagus sylvatica L.) along an extended environmental gradient across Central Europe, covering Croatia, Hungary, Slovakia, Poland and the Czech Republic. First, thorough literature search for the plausible ranges of individual model parameters was conducted. This was followed by the sensitivity analysis to identify the most influential model parameters. Finally, model calibration was performed based on the generalised likelihood uncertainty estimation method and the data from long-term research plots located in the five countries. The calibration was conducted at levels of individual sites and the region as a whole to evaluate different aspects of site-specific and multi-site calibration approaches and to develop a generalised parameter set for the European beech in Central Europe.

How to cite: Merganicova, K., Dobor, L., Hollos, R., Merganič, J., Barcza, Z., Kurjak, D., Novák, J., Sitková, Z., Fleischer, P., Marjanovic, H., Hidy, D., Střelcová, K., and Hlásny, T.: Can we reach a sensible balance between generality of model parameters and accuracy of simulations?, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-10889,, 2021.

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