Equations / Aboveground biomass
North American taxa group: Cupressaceae 0.30–0.39 spg (Table 5)
Aboveground biomassCupressaceae 0.30–0.39 spg (Calocedrus decurrens, Sequoiadendron giganteum, Thuja plicata) · CupressaceaeUnited StatesmixedRead from the original paper
Fitted on these 3 species: Calocedrus decurrens, Sequoiadendron giganteum, Thuja plicata
Equation
As printed (Table 5 caption, p. 140)
ln(biomass) = β0 + β1 ln(diameter)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-2.7765 + 2.4195 * ln(D))D- Diameter at breast height (1.3 m), cm
Incense-cedar, giant sequoia and western redcedar. The 614 cm upper diameter comes from the giant sequoia equation. Median specific gravity of the group: 0.34. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.
Source
doi:10.1093/forestry/cpt053 · Open access · copy we read
Cupressaceae 0.30–0.39 spg 0.34 −2.7765 2.4195 164 10 dbh 3–614 0.76
Sequoiadendron giganteum Sequoia, giant 212 0.34 1
we did not include a correction (Baskerville, 1972) for underestimation
- DBH range
- 3–614 cm
- R²
- 0.76
- Method
- Weighted regression of ln(biomass) on ln(dbh) fitted to 164 pseudodata points generated from 10 published equations; no back-transform correction
- Where
- United States (equations compiled from US and Canadian studies)
- Last checked
- 2026-11-03
Calculate
233
Aboveground biomass (kg)
110
Carbon (kg), ×0.47
402
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 = 30 | 233 | 233 | Computed from the printed form computed from the published form at dbh = 30 cm |
Related
- North American taxa group: Abies ≥ 0.35 spg (Table 5) · same paper · Aboveground biomass
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- North American taxa group: Aceraceae < 0.50 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae 0.40–0.49 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae 0.50–0.59 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae ≥ 0.60 spg (Table 5) · same paper · Aboveground biomass
- North American taxa group: Betulaceae < 0.40 spg (Table 5) · same paper · Aboveground biomass