Servicio de Información Comunitario sobre Investigación y Desarrollo - CORDIS

Landscape modelling software

The following describes the general concept for the landscape model PROXELLS (Process Pixel Landscape) as currently planned for CARBOMONT: Intention is to provide input layers pixel-wise to the core model (1-D SVAT) which calculates land surface to atmosphere fluxes for water vapour and carbon dioxide. The critical information provided in these layers is the following:
- Solar energy in dependence on topography and elevation (direct and diffuse);

- Parameters for canopy conductance along elevation gradients;

- Leaf area index in both forest and grassland stands along elevation gradients;

- Meteorological driver variables along elevation gradients.

Flexibility is obtained for a general spatial model by providing input as a series of matrices with specific pixel-based information. Pre-processing is required by a sophisticated radiation model that provides fields for both direct and diffuse radiation fluxes on an hourly basis. Fields of meteorological input are obtained from regression models fitted to long-term observations at meteorological stations.

Finally, results from field studies that define a small number of key ecosystem functional variables are again stored in input layers such that specific ecosystem properties (according to experience) may be imported to the model. Topography dependent lateral transfer of water within the mountain landscape is included very crudely at present (exploratory sub-model of PROXELLS), but is planned to be improved in the future.

Currently a version of the model is running in FORTRAN and under LINUX for a test landscape. The test version, however, estimates direct and diffuse radiation at each point hourly during simulation runs. It also uses a relatively fixed structure and physiology along elevation gradients (changes stepwise in limited number of categories). A preliminary lateral transfer component is included. Data related to the meteorology and ecosystem layers are currently being analysed for the Berchtesgaden site.

More information on the CARBOMONT project can be found at:

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