Integrated Assesment Model

A sustainable future energy supply will be modelled in the EET-programme. Other groups have already developed models to describe such global connections which are called “integrated assessment models”. These models show the global connections between population development, consumption of resources, energy supply, land use, climate system and economics, whereby the focus of the research groups differs.

The model, which will be developed in the EET-programme until April 2010, will especially focus on an ethical evaluation, which is often neglected in other models. The structure of the EET-model is shown in Figure 1.


The basis of the model will build global balances. The needs and desires of the population, which are the driving forces of human action, will be modelled by fluxes of material .To satisfy these needs different methods and technologies can be used. Economical influences and the population development (demography) will also be considered. The material fluxes, which are needed to satisfy the needs and desires of the population, lead to a consumption of resources and to changes in the ecosystem. The resources include renewable, non-renewable and variable sources. Variable resources are for example the land area, which can be reduced by soil erosion, or the atmosphere which changes e.g. due to CO2 increase.

Due to the interactions in the model the capabilities of the population change. Capabilites might be the possibility to get clean water or which needs and desired can be satisfied in different regions. These capabilities are the basis for the ethical evaluation.

A model to describe the structure of a possible future energy supply has already been developed. With this model the following questions can be answered: Which energy carrier will be the most important in the future? How could a future energy mix look like? It has also been taken into account that in the future not only energy has to be provided sustainably, but also chemicals have to be produced based on biomass.