Equations / Aboveground biomass
Shorea spp., DBH only
Aboveground biomassShorea · DipterocarpaceaeIndonesianaturalRead from the original paper
Covers the whole genus
Equation
As printed (Table 1)
Shorea 24 ln(TAGB) = c + αln(DBH) c −2.193 ... α 2.371 ... 0.984 0.2601 20.49 1.034
In this library's units, ready to compute (kg)
Aboveground biomass = 1.034 * exp(-2.193 + 2.371 * ln(D))D- Diameter at breast height (1.3 m), cm
ln-ln OLS; the authors back-transform with the correction factor (CF) listed in Table 1, which is applied here. Intercepts are negative in the printed table (checked on the rendered page; text extraction drops the sign). DBH measured at 1.30 m or above buttresses.
Source
doi:10.1016/j.foreco.2009.01.027 · Open access · copy we read
The data were collected in lowland mixed Dipterocarp forests in East Kalimantan, Indonesia.
TAGB; total above-ground biomass based on dry weight (kg/tree), DBH: diameter at breast height (cm)
- Trees measured
- 24
- R²
- 0.984
- Residual SE
- 0.2601
- Correction factor
- 1.034 (applied)
- Method
- OLS on ln-transformed data, adjusted r2
- Where
- Lowland mixed Dipterocarp forest, East Kalimantan, Indonesia
- Last checked
- 2026-11-01
Calculate
367
Aboveground biomass (kg)
172
Carbon (kg), ×0.47
632
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 | 367 | 367 | Computed from the printed form hand-computed from the published form |
| D = 80 | 3,753 | 3,753 | Computed from the printed form hand-computed from the published form |
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