cal_airVaporPressureDeficit_meanCanopyflow {simET}

Calculating air vapor pressure deficit at the mean canopy

Description

Calculating air vapor pressure deficit at the mean canopy

Usage

cal_airVaporPressureDeficit_meanCanopyflow(
  D,
  r_a_a,
  rho_cp = 1221.09,
  DELTA,
  A,
  gamma = 0.658,
  lambda_ET
)

Arguments

D

the vapor pressure deficit (mbar)

r_a_a

the aerodynamic resistance between the mean canopy flow and reference height (s m-1)

rho_cp

the volumetric heat capacity for air (1221.09 J m-3 K-1)

DELTA

is the slope of the saturated vapor pressure curve (mbar K-1)

A

is the total energy available to the system (W m-2 ground)

gamma

psychometric constant (0.658 mbar K-1 )

lambda_ET

the total latent heat flux (W m-2 ground)

Value

A vector for the vapor pressure deficit at the mean canopy flow (mbar)

Note

Knowing D0 is essential because this value is used to calculate the latent and sensible heat fluxes for the soil and crop components.