s:922:"TI CO2FIX V 3.1 - A modelling framework for quantifying carbon sequestration in forest ecosystems AU Schelhaas, M.J. AU van Esch, P.W. AU Groen, T.A. AU de Jong, B.H.J. AU Kanninen, M. AU Liski, J. AU Masera, O. AU Mohren, G.M.J. AU Nabuurs, G.J. AU Palosuo, T. AU Pedroni, L. AU Vallejo, A. AU Vilen, T. AB This report describes the conceptual approach of the CO2FIX V 3.1 model, as well as its implementation and numerous examples. This stand level simulation model is a tool which quantifies the C stocks and fluxes in the forest biomass, the soil organic matter and the wood products chain. Included are also a bioenergy module, a financial module and a carbon accounting module. The model is applicable to many different situations: afforestation projects, agroforestry systems, and selective logging systems. The model is freely available from the web, together with numerous examples. ";