FLAG: Func_Multi_Layer_Photosynthesis_Model
In TEST-BNL/R-Canopy_Photosynthesis: Canopy photosynthesis testbed

Canopy multi-layer photosynthesis model

FLAG

`FLAG`	Model version controller; 0–Lloyd et al. 2010 Model for Vcmax-LAI relationship; 1–Mercado et al. 2006 Model for Vcmax-LAI relationship in the tropics
`SZA`	solar zenith angle, in degrees
`Press`	Atmospheric pressure in Pa
`PAR0`	measured top canop irradiance, in umol/m2/s
`LAI`	total canopy LAI
`Tleaf`	Leaf temperature in degrees C
`Tleaf_diff`	Difference in leaf temperature between sunlit and shaded leaf fractions in degrees C
`ambCO2`	ambient CO2 concentration, in ppm
`Vcmax0_25`	Vcmax at reference 25 degrees C for top-of-canopy leaves
`CI`	Clumping inedx; 0.63 for tropical evergreen forests (Chen et al, 2005)
`Topt`	optimal leaf temperature for tropical evergreen forests, from Lloyd and Farquhar, 2008
`Nlayers`	number of layers for Multi-Layer Photosynthesis Modeling
`Phi_sun`	the curvature factor for light response curves for sunlit leaves
`PSII_sun`	maximum quantum yield for sunlit leaves
`Phi_shade`	the curvature factor for light response curves for sunlit leaves
`PSII_shade`	maximum quantum yield for shade leaves
`sf_sun`	scaling factor for sunlit leaves, due to leaf age effect
`sf_shade`	scaling factor for shade leaves, due to leaf age effect
`sf`	scaling factor due to leaf age effect, assuming no phenological partitioning across vertical canopy profile