Reference / Input deck / model / boundary conditions / wall / most
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Monin-Obukhov surface-layer settings.
roughness lengthrequiredheat roughness lengthadvancedsurface potential temperatureadvancedsurface cooling rateadvancedstable formadvancedvon karmanadvancedbeta madvancedbeta hadvanced
roughness lengthrequired
float·required·> 0.0 m
Aerodynamic roughness length z0
Used inatmosphere
heat roughness lengthadvanced
float·not set by default·> 0.0 m
Thermal roughness length z0h; defaults to roughness_length
Used inatmosphere
surface potential temperatureadvanced
float·not set by default·> 0.0 K
Prescribed surface theta_s; unset leaves the wall thermally passive
Used inatmosphere
surface cooling rateadvanced
float·not set by default·in K/h
d(theta_s)/dt applied to surface_potential_temperature (GABLS1 uses -0.25)
Used inatmosphere
stable formadvanced
default hogstrom
Stability function family for stable stratification
Options
| Value | What it does |
|---|---|
| hogstrom default | Linear functions, phi = 1 + beta zeta, with coefficients 'beta m' and 'beta h' (Högström 1988); the surface flux collapses as stability grows. |
| beljaars-holtslag | Beljaars and Holtslag (1991) functions, which keep a finite surface flux under strong stability. |
Used inatmosphere
von karmanadvanced
float·default 0.4·> 0.0
Von Karman constant (atmospheric convention 0.4)
Used inatmosphere
beta madvanced
float·default 4.8·> 0.0
Stable momentum coefficient, phi_m = 1 + beta_m zeta
Used inatmosphere
beta hadvanced
float·default 7.8·> 0.0
Stable heat coefficient, phi_h = 1 + beta_h zeta
Used inatmosphere