Community Research and Development Information Service - CORDIS

Multicompartmental non-steady model

The POPCYCLING-Baltic model, a typical multi-media mass balance model, divides the environment in 85 boxes or compartments, which are considered well-mixed and homogeneous, both with respect to the environmental characteristics and chemical contamination. These environmental phases are then linked by a variety of intercompartmental transfer processes. The division of the Baltic Sea environment into compartments was based on the following considerations:

-The units can be identified in physical geographical terms (e.g. water sheds).
-The units can be considered well mixed with respect to the time scales relevant to POPs, and
-The units have similar characteristics with respect to environmental properties and emission rates of POPs.

The basic graphic units in the model are the eight aquatic sub-basins of the Baltic Sea, and their respective drainage basins, namely:

Bothnian Bay, Bothnian Sea, Gulf of Finland, Gulf of Riga, Baltic Proper, Danish Straits, Kattegat, Skagerrak.

The model is meant to be used as a tool to assess the current level and to elaborate reduction scenarios for the contamination of the environment in the Baltic Sea region by POPs. It is probably the only assessment tool of the type available in Europe at present, taking into account its potential to study the dynamics and kinetics of the POP transport in the marine environment.

Reported by

Norwegian Institute for Air Research
2027 Kjeller
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