List of Symbols
fds
{mol m-2 s-I )
{mol m-2 s-' )
{mol m-2 s-' }
carbon assimilation rate
amplitude of the diurnal soil surface
temperature
plant available water
Jlwc density of blackbody radiation
speed of light
fraction of sky covered with cloud
spec$c heat of air at constant pressure
speclJc heat of soil
concentration of gas j in air
concentration of solute in osmotic solution
zero plane displacement
characteristic dimension
soil damping depth
vapor dejicit of air
thermal dzfusivity
energy of one photon
radiation conversion eficiency for crops
vaporpressure of water
partial pressure of water vapor in air
saturation vaporpressure of water at
temperature T
evaporation rate for water
respiratory evaporative water loss
skin evaporative water loss
fraction of radiation intercepted by a crop
canopy
fraction of downscattered radiation in a
particular waveband
view factor for atmospheric thermal
radiation
view factor for dzfuse solar radiation
view factor for ground thermal radiation
view factor for solar beam