m_modmet_cloud_fraction Module

Estimates cloud fraction from measured global radiation and solar geometry. Reference: KNMI WR 83-4 cloud-cover parameterization.

Uses

- modmet_constants
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Used by

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Nodes of different colours represent the following:

Solid arrows point from a submodule to the (sub)module which it is descended from. Dashed arrows point from a module or program unit to modules which it uses.

Functions

public function modmet_cloud_fraction(lat, lon, jcm2, mt, dy, hr) result(cloud_fraction)

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=RK),	intent(in)			::	lat	latitude [degrees]
real(kind=RK),	intent(in)			::	lon	longitude [degrees]
real(kind=RK),	intent(in)			::	jcm2	global radiation [J/cm^2]
integer,	intent(in)			::	mt	month [1..12]
integer,	intent(in)			::	dy	day [1..31]
integer,	intent(in)			::	hr	hour [0..23]

Return Value real(kind=RK)

estimated cloud fraction [0..1] or -999.0