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Namespace canopy_profile_mod

Namespace List > canopy_profile_mod

Public Functions

Type Name
subroutine canopy_foliage (MODLAYS MODLAYS, ZHC ZHC, ZCANMAX ZCANMAX, SIGMAU SIGMAU, SIGMA1 SIGMA1, FAFRACZINT FAFRACZINT)
Compute canopy foliage and plant distribution functions.
subroutine canopy_zpd (ZHC ZHC, FCLAI FCLAI, UBZREF UBZREF, Z0GHC Z0GHC, LAMBDARS LAMBDARS, CDRAG CDRAG, PAI PAI, FCH FCH, HREF HREF, Z0_MOD Z0_MOD, VTYPE VTYPE, LU_OPT LU_OPT, Z0_OPT Z0_OPT, d_h d_h, zo_h zo_h)
Compute zero plane displacement height and surface roughness length.

Public Functions Documentation

function canopy_foliage

Compute canopy foliage and plant distribution functions. 

subroutine canopy_profile_mod::canopy_foliage (
    MODLAYS MODLAYS,
    ZHC ZHC,
    ZCANMAX ZCANMAX,
    SIGMAU SIGMAU,
    SIGMA1 SIGMA1,
    FAFRACZINT FAFRACZINT
)

Computes canopy foliage and plant distribution functions based on Massman et al. (2017) algorithms. Calculates foliage area fraction distribution throughout the canopy layers.

Parameters:

  • MODLAYS Number of model layers
  • ZHC Height of each canopy model layer (z/h)
  • ZCANMAX Height of maximum foliage area density (z/h)
  • SIGMAU Standard deviation of shape function above zcanmax (z/h)
  • SIGMA1 Standard deviation of shape function below zcanmax (z/h)
  • FAFRACZINT Foliage area fraction at each canopy model layer [output]

Author:

P.C. Campbell

Date:

October 2022

Note:

Based on Massman et al. (2017) algorithms

function canopy_zpd

Compute zero plane displacement height and surface roughness length. 

subroutine canopy_profile_mod::canopy_zpd (
    ZHC ZHC,
    FCLAI FCLAI,
    UBZREF UBZREF,
    Z0GHC Z0GHC,
    LAMBDARS LAMBDARS,
    CDRAG CDRAG,
    PAI PAI,
    FCH FCH,
    HREF HREF,
    Z0_MOD Z0_MOD,
    VTYPE VTYPE,
    LU_OPT LU_OPT,
    Z0_OPT Z0_OPT,
    d_h d_h,
    zo_h zo_h
)

Computes zero plane displacement height and total surface roughness length based on Massman et al. (2017) algorithms. Uses foliage characteristics, drag coefficient, and in-canopy plant distribution functions.

Parameters:

  • ZHC Height of each canopy model layer (z/h)
  • FCLAI Foliage area fraction at each canopy model layer
  • UBZREF Mean wind speed at reference height (m/s)
  • Z0GHC Ground roughness length to canopy height ratio
  • LAMBDARS Leaf-scale resistance adjustment factor
  • CDRAG Drag coefficient (nondimensional)
  • PAI Plant/foliage area index (nondimensional)
  • FCH Grid cell canopy height (m)
  • HREF Reference height (m)
  • Z0_MOD Surface roughness length modifier
  • VTYPE Grid cell dominant vegetation type
  • LU_OPT Integer for LU type from model
  • Z0_OPT Integer for roughness length option
  • d_h Zero plane displacement height normalized by canopy height [output]
  • zo_h Surface roughness length normalized by canopy height [output]

Author:

P.C. Campbell

Date:

June 2022

Note:

Based on Massman et al. (2017) algorithms

The documentation for this class was generated from the following file src/canopy_profile_mod.F90