Denmark's National Inventory Report 2005 - Submitted under the ...

Data on the annually harvested amount of wood (Figure 7.2) are obtained from Statistics Denmark
(http://www.statistikbanken.dk/). Commercial harvesting was used in the calculations for
broadleaved species as wood from thinning operations in young stands is sold as fuel wood and
therefore appears in the statistics. For conifers, non-commercial thinning operations are more
common. In order to account for this, 20% were added to the figures for commercial harvests of
coniferous wood.
Figure 7.2 Total annual harvest of commercial wood in forests planted before 1990. The peak in 2000 is almost
solely due to windthrow of conifers during the storm in Dec. 3, 1999. From Statistics Denmark
(http://www.statistikbanken.dk/).
The net annual increment (gross wood increment minus harvested wood) was estimated to approximately
2.3 M m 3
y -1
for 1990–1999 and is estimated to approximately 2.7 M m 3
y -1
for 2000-2003
(Larsen and Johannsen, 2002). Rates of wood increment are converted to CO uptake by using the
2
expansion factors, basic wood densities and carbon concentration mentioned above.
The data on gross uptake of CO due to annual gross increment, annual loss of CO with harvested
2 2
wood and the resulting net sink for CO are given in Table 7.2.3. The resulting net sink for CO in
2 2
existing forests in 1990 was around 3,000 Gg CO yr 2 -1
for the period 1990-1999 and somewhat
higher (around 3,500 Gg CO y 2 -1
for the period 2000-2002. In the year 2000 the sink was much lower
than in all other years due to the storm in December 1999. The windthrow caused by this storm
made the harvested amount of wood in 2000 more than two times higher than during an average
year. The storm-felled amount of wood amounted to 3.6 M m 3
distributed over about 20,000 ha
(Larsen and Johannsen, 2002).
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