|
APAR
|
Absorption of photosynthetically active radiation (PAR) (MJ m−2 month−1)
|
|
e %
|
Relative average error
|
|
ζ
|
Fraction of ground area covered by the canopy
|
|
f
H
|
Fraction of PAR that is absorbed by a homogeneous canopy
|
|
f
i
|
Fraction of PAR that is absorbed by species i
|
|
i
|
Indicates the i
th species of n species
|
|
j
|
Indicates the j
th canopy layer of n layers
|
|
k
|
Light extinction coefficient
|
|
k
H
|
Light extinction coefficient of a homogeneous canopy
|
|
H
b
|
Height to crown base (m)
|
|
h
m
|
The mid-crown-height (m) of a layer or species; given as (height – H
b
)/2 + H
b
|
|
λ
h
|
Empirical parameter to account for the effects of horizontal heterogeneity within the j
th canopy layer
|
|
λ
v
|
Empirical parameter to quantify the vertical structure of a canopy layer and to partition layer APAR to each species within the layer
|
|
L
|
Leaf area index (m2 m−2)
|
|
L
A
|
Individual tree leaf area (m2)
|
|
LAD
|
Leaf-area density in terms of leaf area per crown volume (m2 m−3)
|
|
LCL
|
Live-crown length (m)
|
|
MAE%
|
Relative mean absolute error
|
|
MSE
|
Mean square error
|
|
O
|
Observed calculations from the tree-level model (Maestra)
|
|
|
Mean of O
|
|
P
|
Predicted values from the stand-level model
|
|
|
Mean of P
|
|
S
A
|
Crown surface area of individual trees (m2)
|
|
v
frac
|
Sum of the crown volume (m3) of all crowns within a given layer within one hectare divided by the total volume of that layer
|
|
ϕ
|
Empirical parameter to quantify the horizontal structure of a canopy layer (see Appendix A)
|
|
z
adj
|
An adjusted mean midday solar zenith angle (°) (see Appendix B)
|
