The three-day workshop organized by the three Nordic research projects, ECOCLIM, LAGGE and SnowCarbo brought together scientists and other actors from Nordic countries to communicate and discuss research on carbon budget estimations in the Nordic region. Through presentations of most recent research in the field and following scientific discussions, the workshop contributed to strengthen the scientific basis of the identification and quantification of major natural carbon sinks in the Nordic region on which integrated climate change abatement and management strategies and policy decisions is formed from. This report summarizes presentations and discussions from the four thematic sessions, Observations of carbon sinks and sources, Modeling the carbon budget, Remote sensing data for carbon modeling, and Impacts of future climate and land use scenarios and gives an overview of the current status and knowledge on research on assessments of national carbon budgets as well as on projections and sensitivity to future changes in e.g. management and climate change in the Nordic Region.