psim Function

public function psim(zeta, mp, CPI_C) result(r)

Purpose

Evaluates the integrated similarity function for momentum transfer, $\psi_m(\xi)$.

Method

Uses the Businger-Dyer form for unstable conditions ($\xi<0$) and the Beljaars-Holtslag form for stable conditions ($\xi>0$).

This function is used in the evaluation of the friction velocity in comp_friction_vel.

References

• Beljaars and Holtslag (1991)
• Businger et al. (1971)
• Dyer (1974)

Arguments

Type	Intent	Optional	Attributes		Name
real,	intent(in),		DIMENSION(mp)	::	zeta	current value of stability parameter $\xi$ (-)
integer,	intent(in)			::	mp	size of cable vector of land points (-)
real,	intent(in)			::	CPI_C	$\pi$ (-)

Return Value real, DIMENSION(mp)