Dead Wood Results

This result group contains: Volume of dead wood per decay class.

Dead wood as a result of dead wood inventory data (if supplied or calculated), occurrence of mortality, and dead wood decay.

Note! All dead wood results refer to the stem part, including bark, above ground. Branches, foliage, tree tops, stumps and roots are input to the soil carbon model, i fnot extrcted as bio fuels.

Result variables

MinDiameter, indicates if the minimum diameter set in the Dead Wood control table (default 10 cm) is used.

Variable name	Unit	Min diameter used?	Description
Carbon in Deadwood	tonnes C/ha	Yes	Carbon content in dead wood, based on the biomass (which differs between decay class) in stem and bark.
Dead Standing Trees	volume, m3/ha	Yes	Volume of dead standing trees, with a diameter ≥ MinDiameter when the tree died. Depending on decay class, a certain proportion of the dead wood is assumed standing dead trees, and the rest assumed downed, see table below.
Dead Standing Coniferous Trees	volume, m3/ha	Yes	Volume of dead standing trees of pine, spruce, and Logepole pine. Larch is also included.
Dead Standing Deciduous Trees	volume, m3/ha	Yes	Volume of dead standing trees of broad-leaved trees.
Downed Dead Wood	volume, m3/ha	Yes	Volume of downed standing trees, with a diameter ≥ MinDiameter when the tree died. Depending on decay class, a certain proportion of the dead wood is assumed standing dead trees, and the rest assumed downed, see table below.
Downed Standing Wood Coniferous	volume, m3/ha	Yes	Volume of downed dead wood of pine, spruce and Logepole pine. Larch is also included.
Downed Dead Wood Deciduous	volume, m3/ha	Yes	Volume of downed dead wood of of broad-leaved trees.
Volume Decay Class 0-4	volume, m3/ha	No	Volume of dead wood in a given decacy class.

Proportion standing and downed dead wood

The proportion of dead wood that consists of downed logs vs. stand trees are handled as constant for a given decay class. Based on statistics from the Swedish NFI-data.

Decay Class	Proportion downed logs (%)
0	39
1	39
2	70
3	91
4	98

Default decay class distribution

If you import data on dead wood occurrence, but only for the total and not per decay class, a default distribution is assumed:

Decay Class	Proportion of total dead wood (%)
0	13
1	17
2	20
3	23
4	27

Carbon concentration per decay class

Values are given as percentage (%) of dead wood dry matter. Based on Sandström et al. 2007 (Table 10). For birch, no data was avaliable and has therefore been set to 50 % for all classes.

Decay Class	Pine, Contorta and Larch	Spruce	Birch (and other species)
0	50.32	49.22	50.0
1	50.52	49.17	50.0
2	51.46	49.68	50.0
3	51.46	50.81	50.0
4	52.23	51.27	50.0