Fig. 2From: Initial forest age distribution may generate computational sinks or sources of carbon: A generic approach to test assumptions underlying the EU LULUCF forest reference levelsThe total volume harvested (left) and growing stock (right), when harvesting the oldest class in a time step for altogether 13 five-year periods. The Reference Period (RP) and Compliance Period (CP) took place in the periods 1–2 and 5–6, respectively. The filled and dashed bars correspond to forecast and backcast, respectively, projections of the bimodal (bimod1 and bimod2), J-shaped (skwj), reverse-J shaped (revj), normal (norm), and uniform (unif) distributions. The values of the y-axis are arbitrary total volumes that depend on the age-volume relationship (see "Methods")Back to article page