Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

SVAT modelling software

The SVAT model developed is a 1-dimensional, multi-layer representation of the soil-vegetation-atmosphere continuum and calculates the fluxes of CO2 and energy between the soil-vegetation system and a specified reference height above the canopy.

It consists of coupled micrometeorological and physiological modules: The micrometeorological modules compute radiative transfer, the interception of precipitation, the transfer of momentum and the turbulent dispersion CO2, H2O and sensible heat within and above the canopy using a random-flight scheme. Turbulence statistics required for the turbulent dispersion calculations are derived from a second-order closure model. Soil heat and water fluxes and soil respiration are modelled in the soil module.

The environmental variables computed in the micrometeorological modules represent the driving forces for the energy balance model, which partitions absorbed energy into emitted long-wave radiation, latent and sensible heat fluxes. Net photosynthesis, respiration, and stomatal conductance are calculated in a sub-module of the energy balance.

Given the necessary abiotic and biotic input data are supplied, the model allows the simulation of CO2, H2O and energy exchange between any ecosystem and the atmosphere. Due to its mechanistic basic the model allows to study the various component processes, their interactions and the way these are influenced by land-use changes.

More information on the CARBOMONT project can be found at: http://carbomont.uibk.ac.at

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University of Innsbruck, Institute of Botany
Sternwartestr. 15
6020 Innsbruck
Austria
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