Using ecosystem manipulation data for Model-Data-Fusion of a generic
vegetation model
T. Thum1), P. Peylin2), A. Ibrom3), L. van der Linden3), P. Ciais2)
1)Finnish Meteorological Institute, Helsinki, Finland
2)LSCE, Gif-Sur-Yvette, France
3)Risø DTU, Roskilde, Denmark
In ecosystem manipulation experiments (EMEs) the ecosystem is
artificially exposed to different environmental conditions. At Danish
EME site Brandbjerg the responses of a shrubland to drought, warming
and increased atmospheric CO2 concentration are studied. These
experiments provide excellent data for validation and development of
ecosystem models. In this work we used generic vegetation model
ORCHIDEE, that is used also in global scale simulations, with
Model-Data-Fusion (MDF) approach. In MDF we are using observations from
the site to optimize the model parameters. This enables us to assess
the modelling errors and the performance of the model for different
treatments. This insight will inform us whether the different processes
are adequately modelled or if some important processes are missing. The
preliminary results suggest that a new plant functional type need to be
developed to ORCHIDEE in order to successfully simulate the Brandbjerg
site.
Tea_Thum_MalSem_02022012.pdf