The effects of harvesting forest residues and/or stemwood on forest carbon stock are examined in this calculator. This analysis reflects a scenario where forest residues are harvested instead of being left to decay in forest and/or stemwood is harvested instead of being left in forest to grow. Thus, the results are differences in the forest carbon stock development (i.e. forest carbon) between harvest and no-harvest scenarios.
Defines the annual amount of forest residues and/or stemwood harvested. Harvest rate can be given in cubic meters (m3), in tonnes of carbon (t C), or in energy (GJ).
The proportions of forest residues and stemwood harvested can be defined by the user, or the calculation can be carried out with the given default values that reflect roughly the typical proportions of residues and stemwood in the energy wood harvested.
Defines the number of years of consecutive annual energy wood harvesting. This may for example correspond to the assumed operating life of a power plant.
Determines the length of the period over which the effect of wood harvesting on forest carbon is examined.
The result above can be compared to cumulative emissions of an activity in a corresponding period.
The result above can be compared to annual emissions of an activity in a corresponding period.
This represents the amount the forest carbon has diminished at the end of the planning horizon (or the amount the forest carbon sink has cumulatively diminished during the planning horizon) in relation to the amount of carbon that has been cumulatively harvested in the period of wood harvesting. This dimensionless number is also converted to CO2 per energy content of the harvested wood, which is comparable for example to the CO2 emissions resulting per energy content from burning of fossil fuels.
The figure above represents the amount the forest carbon is diminished annually, as a result of wood harvesting, compared to the year before as a function of time. The annual diminishment of the forest carbon (positive value in the figure) corresponds to the annual emissions, and the avoided diminishment of the balance (negative value in the figure) corresponds to the avoided emissions resulting from the harvesting of wood.