Picea abies / Aboveground biomass
Norway spruce total above-ground biomass, Model 1c (Eq. 17)
Aboveground biomassPicea abies · PinaceaeFinlandmixedRead from the original paper
© Douglas Goldman · CC BY-SA · iNaturalistEquation
As printed (Eq. 17, p. 633)
ln(yki) = b0 + b1 dSki/(dSki + 20) + b2 ln(hki) + uk + eki
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-1.808 + 9.482 * (2 + 1.25*D)/((2 + 1.25*D) + 20) + 0.469 * ln(H) + (0.006 + 0.013)/2)D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Total above-ground biomass of the stem wood, bark, living and dead branches and needles. dS = 2 + 1.25d. Variance correction (0.006+0.013)/2 = 0.0095 added to the intercept in both forms. Sample trees spanned d 1.7–41.7 cm and h 2.1–35.0 m (Table 3, all 613 trees); the total equation used 166 trees, so no fit range is stated. Mineral-soil stands, Finland.
Source
doi:10.14214/sf.184 · Open access · copy we read
Total Eq. 17 N = 166 b0 –1.808 b1 9.482 b2 0.469 var(uk) 0.006 var(eki) 0.013
dSki = 2 + 1.25 dki
a variance correction term, (σu² + σe²)/2 … should be added to the intercept
- Trees measured
- 166
- Correction factor
- 1.00955 (applied)
- Method
- Multivariate linear mixed model on ln(biomass) with stand random effects (fitted jointly with component equations); fixed part shown, with variance correction (var(u)+var(e))/2 added to the intercept
- Where
- Finland, mineral-soil stands (mostly southern and central Finland)
- Last checked
- 2026-11-01
Calculate
Height from
149
Aboveground biomass (kg)
70
Carbon (kg), ×0.47
257
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 20, H = 18 | 149 | 149 | Computed from the printed form computed from the published form (with variance correction) at d = 20 cm, h = 18 m |
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