Summary
This chapter describes (1) how light distributes within a leaf canopy and (2) light interception by leaves. Basic equations are shown so that readers can make light distribution models by themselves.
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Abbreviations
- F :
-
Fraction
- h :
-
Height
- I c :
-
Absorbed flux per leaf area
- I d :
-
Downward flux
- Ι u :
-
Upward flux
- k :
-
Light extinction coefficient
- k′:
-
Light extinction coefficient for “black” leaves
- L :
-
Cumulative amount of leaf area per unit soil area
- L t :
-
Total amount of leaf area per unit soil area
- LAI :
-
Leaf area index
- N :
-
Sky radiance
- n :
-
Layer
- NIR:
-
Near infrared radiation
- p :
-
Path width
- PAR :
-
Photosynthetically active radiation
- r :
-
Radius
- S :
-
Soil surface
- T :
-
Temperature in Kelvin
- UOC:
-
Uniform overcast sky
- UV:
-
Ultraviolet radiation
- w :
-
Width
- α :
-
Azimuth
- β :
-
Solarelevation
- ζ :
-
Angle between leaf normal and solar ray
- ρ :
-
Reflection coefficient
- λ :
-
Leaf angle
- σ :
-
Scattering coefficient
- τ :
-
Transmission coefficient
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Goudriaan, J. (2016). Light Distribution. In: Hikosaka, K., Niinemets, Ü., Anten, N. (eds) Canopy Photosynthesis: From Basics to Applications. Advances in Photosynthesis and Respiration, vol 42. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-7291-4_1
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