The Impact Pathway Approach starts with the emission of a pollutant at the location of the source into the environment.
Two emission scenarios are needed for each calculation, one reference or base scenario (e.g. Fig. 1) and one case scenario (e.g. Fig. 2).
The background concentration of pollutants in the reference scenario is a significant factor for pollutants with non-linear chemistry or non-linear
In EcoSenseWeb the user can choose between two reference scenarios: the EMEP 2010 or EMEP 2020 emission scenario. The case scenario for point sources is built
by the sum of emissions of the point source with the reference scenario in a specific grid cell.
The examples in Figure 1 and Figure 2 show the gridded emission of NOx in the year 2010 for all sectors.
The data and the map are taken from the EMEP-Data webpage.
Fig. 1: Example for a reference scenario. Only NOx-emissions for the year 2010 and for all sectors are displayed.
Fig. 2: Example for a case scenario. The point source emissions from e.g. a facility are added to the reference scenario.