Simulation of CO2 Fluxes in European Forest Ecosystems with the Coupled Soil-Vegetation Process Model “LandscapeDNDC”

摘要: CO2 exchange processes in forest ecosystems are of profound ecological and economic importance, meaning there is a need for generally applicable simulation tools. However, process-based ecosystem models, which principal suitable the task, commonly evaluated at only few sites limited number plant species. It thus often unclear if parameters involved model application regional scale. We tested LandscapeDNDC growth module PnET (derived from Photosynthetic / EvapoTranspiration model) with site-specific as well multi-site calibrated using independent data sets eddy covariance measurements across European transect. Although parametrization superior (r2 pooled Gross Primary Production (GPP) during calibration period: = 0.93, 0.88; r2 Net Ecosystem Exchange (NEE) 0.81, 0.73), we show that general able to represent carbon uptake over periods several years. The procedure has been applied three most dominant tree species i.e., Scots pine, Norway spruce beech. In addition, discuss potential improvements regard sensitivity site conditions differentiated into climate, nutrient drought influences.