For this research project, we perform a large number of global EC-Earth greenhouse gas sensitivity experiments to explore the effect of the changing ecological systems as well as the change of physical constitutes such as global sea-ice cover retraction, differing snow cover in polar regions, leaching of GHG, etc, in the Earth's climate system from preindustrial(1850AD) to future climate scenarios (2100AD). To investigate this, we need to apply the EC-Earth model in its full-featured configuration including atmosphere, ocean, ocean biogeochem, land, interactive vegetation (LPJ), carbon cycle, biogeochem, etc.