At present, the surface exchange of GHG in Denmark and Danish waters is unknown and qualified predictions of the effect of changes in climate or anthropogenic activates are not possible. The overall aim of this project is to construct a model-system encompassing both terrestrial and marine ecosystems that allows us to quantify the present exchange of GHG with main focus on carbon dioxide (CO2) and methane (CH4). The construction of the model system is based on data from new,
existing and previous field experiments and on improved ecosystem and atmospheric models.