Effects of Intra-Biome Variations in the Tropical Rainforest Biophysical Parameters on the Fluxes Between the Surface and the Atmosphere
Hewlley
Acioli
Imbuzeiro, Department of Agricultural Engineering, Federal University of Vi�osa, hewlley@vicosa.ufv.br
(Presenting)
Gleidson Charles
Botelho
Baleeiro, Department of Agricultural Engineering, Federal University of Vi�osa, gcbb@nobugs.ufv.br
Marcos
Heil
Costa, Department of Agricultural Engineering, Federal University of Vi�osa, mhcosta@ufv.br
It is well known that fluxes of water, energy and carbon between tropical rainforests and the atmosphere vary considerably from site to site. This variation may be the result of climate variations only, or could be the result of a combination of different climate and vegetation characteristics at each site. In this work, we propose a modeling experiment to evaluate what are the sources of fluxes variations among tropical rainforest sites. The methodology consists of calibrating an ecosystem model (IBIS) using data collected at five micrometeorological sites in areas of primary forest. The model is initially calibrated using data from each individual site, and then re-calibrated using data from all sites. By comparing the biophysical parameters obtained in the individual calibration with the parameters obtained in the multi-site calibration, we can determine whether vegetation biophysical parameters are significantly different among sites, and to what extent their intra-biome variability is responsible for the variations on the fluxes between the surface and the atmosphere. In addition, these results will allow an estimate of which errors are expected when a vast biome like the Amazon tropical rainforest is represented by a single set of parameters in large-scale dynamical ecosystem models or in the context of climate models.