The
satellite-based Vegetation Photosynthesis Model (VPM) that estimates seasonal
dynamics of gross primary production (GPP) of vegetation was applied to 5
European forest and grassland sites. The relatively simple VPM model is based
upon light absorption by leaf chlorophyll, leaf water content and leaf age. The
current version of the VPM model relates the Enhanced Vegetation Index (EVI) to
light absorption by leaf chlorophyll and the Land Surface Water Index (LSWI) to
leaf water content, modifying implied functional relationships within the model
according to daily air temperature and photo-synthetically active radiation
input. We used site-specific climate data and CO2 flux data of the
year 2002 from three beech forest sites and two grassland/cropland sites of the
CARBOEUROPE network for testing.
Author: Xiangming Xiao (xiao at eos dot sr dot unh dot edu)
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