Abies lasiocarpa / Aboveground biomass

Subalpine fir total aboveground biomass from DBH and height (Table 4)

Aboveground biomassAbies lasiocarpa · PinaceaeUnited StatesmixedRead from the original paper

Equation

As printed (Table 4, species row and table note)

Subalpine fir a, b, c, d, CF: −5.5175 2.6795 1.2805 −0.0759 CF 1.0000; model form exp(a + bX1 + cX2 + dX3)

In this library's units, ready to compute (kg)

Aboveground biomass = exp(-5.5175 + 2.6795 * ln(D) + 1.2805 * ln(H) + (-0.0759) * H)

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

AGB is total aboveground live-tree biomass (stem, bark, branches, foliage). X1 = ln(DBH), X2 = ln(HT), DBH in cm and HT in m. Species identified from the common name in Table 4 (scientific name added from the standard species symbol). Stand type is not stated. Observed ranges in Table 1 cover all trees of the species used.

Source

Poudel, K. P., Temesgen, H., Radtke, P. J., & Gray, A. N. (2019). Estimating individual-tree aboveground biomass of tree species in the western U.S.A. Canadian Journal of Forest Research, 49(6), 701-714.

doi:10.1139/cjfr-2018-0361 · Open access · copy we read

Subalpine fir ... n 98

Trees measured · Table 1

Subalpine fir DBH min 3.5 max 44.4; HT min 2.2 max 27.9

Smallest DBH · Table 1

Trees measured: 98
DBH range: 3.5–44.4 cm
Height range: 2.2–27.9 m
Method: nonlinear regression, response not log-transformed (CF = 1.0000)
Where: Western U.S.A., legacy destructive-sampling biomass collection (Radtke et al. 2015)
Last checked: 2026-11-02

Calculate

DBH (cm)Height (m)

Height from

126

Aboveground biomass (kg)

59.4

Carbon (kg), ×0.47

218

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 = 15	126	126	Computed from the printed form computed from the Table 4 coefficients
D = 40, H = 25	729	729	Computed from the printed form computed from the Table 4 coefficients

Report a problem with this equation · JSON

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Compare these curves

Subalpine fir total aboveground biomass from DBH and height (Table 4)

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