NAM_SSOn

NAM_SSOn content

Fortran name	Fortran type	Default value
CROUGH	CHARACTER(LEN=4)	‘BE04’
XFRACZ0	REAL	2.0
LDSV	LOGICAL	.FALSE.
LDSH	LOGICAL	.FALSE.
LDSL	LOGICAL	.FALSE.

• CROUGH : type of orographic roughness length. The following options are currently available:

  • “Z01D”: orographic roughness length does not depend on wind direction

  • “Z04D”: orographic roughness length depends on wind direction

  • “BE04”: Beljaars et al. [2004] orographic drag

  • “NONE”: no orographic treatment

• XFRACZ0 : Z0=min(Z0, Href/XFRACZ0)

• XCOEFBE : coefficient for Beljaars calculation of SSO drag.

• LDSV : orographic shadowing, sky view factor (only if LORORAD = T in PGD field)

• LDSH : orographic shadowing, shadow factor (only if LORORAD = T in PGD field)

• LDSL : orographic shadowing, slope factor (only if LORORAD = T in PGD field)