Description Usage Arguments Author(s)

View source: R/Func_MultiLayer_Photosynthesis.R

Canopy multi-layer photosynthesis model

1 2 3 | ```
Func_Multi_Layer_Photosynthesis_Model(FLAG, SZA, Press, PAR0, LAI, Tleaf,
Tleaf_diff, ambCO2, Vcmax0_25, CI, Topt, Nlayers, Phi_sun, PSII_sun,
Phi_shade, PSII_shade, sf_sun, sf_shade, sf)
``` |

`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 |

Jin Wu

Shawn Serbin

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