carbon poolmeans the whole or part of a biogeochemical feature or system within the territory of a Member State and within which carbon, any precursor to a greenhouse gas containing carbon, or any greenhouse gas containing carbon is stored;
carbon stockmeans the mass of carbon stored in a carbon pool;
climate changemeans a change of climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods.
forestmeans an area of land defined by the minimum values for area size, tree crown cover or an equivalent stocking level, and potential tree height at maturity at the place of growth of the trees as specified for each Member State in Annex II.
forest reference levelmeans an estimate, expressed in tonnes of CO2 equivalent per year, of the average annual net emissions or removals resulting from managed forest land within the territory of a Member State in the periods from 2021 to 2025 and from 2026 to 2030, based on the criteria set out in this Regulation;
half-life valuemeans the number of years it takes for the quantity of carbon stored in a category of harvested wood products to decrease to one half of its initial value;
harvested wood productmeans any product of wood harvesting that has left a site where wood is harvested;
instantaneous oxidationmeans an accounting method that assumes that the release into the atmosphere of the entire quantity of carbon stored in harvested wood products occurs at the time of harvest;
natural disturbancesmeans any non-anthropogenic events or circumstances that cause significant emissions in the LULUCF sector, the occurrence of which is beyond the control of the relevant Member State, and the effects of which the Member State is objectively unable to significantly limit, even after their occurrence, on emissions;
sinkmeans any process, activity or mechanism that removes a greenhouse gas, an aerosol, or a precursor to a greenhouse gas from the atmosphere;
sourcemeans any process, activity or mechanism that releases a greenhouse gas, an aerosol or a precursor to a greenhouse gas into the atmosphere;