Thuja occidentalis / Aboveground biomass

North American taxa group: Cupressaceae < 0.30 spg (Table 5)

Aboveground biomassThuja occidentalis · CupressaceaeUnited StatesmixedRead from the original paper

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(-1.9615 + 2.1063 * ln(D))

D: Diameter at breast height (1.3 m), cm

Fitted for the Cupressaceae < 0.30 spg taxon, which held only northern white-cedar equations, so it is recorded as a species fit. Median specific gravity of the group: 0.29. Diameter range is that of the pseudodata. R² is the published 'R²-statistic'.

Source

Chojnacky, D.C., Heath, L.S., Jenkins, J.C. (2014). Updated generalized biomass equations for North American tree species. Forestry, 87(1), 129–151.

doi:10.1093/forestry/cpt053 · Open access · copy we read

Cupressaceae < 0.30 spg 0.29 −1.9615 2.1063 48 6 dbh 3–66 0.76

Equation · Table 5 row, p. 140

Cupressaceae , 0.30 spg Thuja occidentalis Cedar, northern white 241 0.29 6

Taxon · Table 2, p. 135

we did not include a correction (Baskerville, 1972) for underestimation

Correction factor · Methods, p. 139

DBH range: 3–66 cm
R²: 0.76
Method: Weighted regression of ln(biomass) on ln(dbh) fitted to 48 pseudodata points generated from 6 published equations; no back-transform correction
Where: United States (equations compiled from US and Canadian studies)
Last checked: 2026-11-03

Calculate

DBH (cm)

182

Aboveground biomass (kg)

85.4

Carbon (kg), ×0.47

313

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	182	182	Computed from the printed form computed from the published form at dbh = 30 cm

Report a problem with this equation · JSON

Canadian national equation, eastern white-cedar, dbh and height (sum of wood, bark, branches, foliage; Table 4) · Lambert et al. 2005 · DBH + Height
Canadian national equation, eastern white-cedar, dbh only (sum of wood, bark, branches, foliage; Table 3) · Lambert et al. 2005 · DBH
Western redcedar total aboveground biomass from DBH and height (Table 4) · Poudel et al. 2019 · DBH + Height
NSVB northern white-cedar, species-level (all ecodivisions): total aboveground biomass (without foliage), segmented model (Eq. 2), D ≥ 9 in (22.86 cm) · Westfall et al. 2024 · DBH + Height
NSVB northern white-cedar, species-level (all ecodivisions): total aboveground biomass (without foliage), segmented model (Eq. 2), D < 9 in (22.86 cm) · Westfall et al. 2024 · DBH + Height
North American taxa group: Abies ≥ 0.35 spg (Table 5) · same paper · Aboveground biomass
North American taxa group: Abies < 0.35 spg (Table 5) · same paper · Aboveground biomass
North American taxa group: Aceraceae ≥ 0.50 spg (Table 5) · same paper · Aboveground biomass
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

Compare these curves

North American taxa group: Cupressaceae < 0.30 spg (Table 5)

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