IPCC For the hypothetical country,
GW = 4.0 tonnes d.m.
ha-1 yr-1 (Table 4.12); and
R = 0.40 tonne d.m. (tonne d.m.)-1 for
above-ground biomass <50 gtotal =" 4.0" cf =" 0.47">● 5.6 tonnes d.m. ha-1 yr-1 ● 0.47 tonne C (tonne d.m.)-1
= 2,632 tonnes C
In recent decades, the researchers say the area burned each year by wildfire has doubled, annual harvest rates have increased somewhat, and rates of carbon uptake by aging (Canadian) forests have slowed. In extreme fire years, such as 1995, 1998, 2002, 2003, and 2004, the carbon dioxide released as the forests burned accounted for up to 45% of Canada's total greenhouse gas emissions, dwarfing emissions from big industrial sources. In other years the forest still absorbs more carbon than it releases.