WAsP Configuration Parameters#

The WAsP model uses configuration parameters for the terrain and climate models. These parameters can be accessed and modified through pywasp.wasp.Config.

Usage #

import pywasp as pw

# Create config with default parameters (WAsP 12.10)
conf = pw.wasp.Config()

# Or specify a parameter set
conf = pw.wasp.Config("WAsP_12.8")

# Access parameters by index or name
conf.climate[10]  # by index
conf.climate["A0"]  # by name (if defined)

# Modify parameters
conf.climate[10] = 1.8

# View all parameters
print(conf)

Climate Parameters #

Parameters for WAsP’s atmospheric boundary layer and wind profile models.

Index	Name	Default	Units	Description
10	a0	1.8		$A_{0}$-parameter in geostrophic drag law under neutral conditions
11	b0	4.5		$B_0$-parameter in neutral geostrophic drag law
44	f_lim	10		Lower limit of absolute latitude for f in Rossby number
97	water_roughness_length			water roughness length used in program

Terrain Parameters #

Parameters for WAsP’s orography and roughness models.

Index	Name	Default	Units	Description
31	decay_length	10000	m	Decay-length for importance of roughness relative to distance from center
40	upper_kink_ibl_profile	0.3	none	Factor for upper kink in roughness change wind profile in the ibl
41	lower_kink_ibl_profile	0.09	none	Factor for lower kink in roughness change wind profile in the ibl
65	sub_sector_no	9		Sub-sectors in roughness map analysis
67	max_no_roughness_changes	10		Max number of roughness changes/sector. See \cite{Floors2018b} for description and sensitivity. This array is dimensioned in the variable mrchs in dimpar.f90.
68	max_rms_error	0.3		Maximum root-mean square (rms) error in log(roughness) analysis of roughness changes for a given sector. Setting a lower error threshold will allow a higher number of roughness changes to be taken into consideration, for each sector. Choosing 0 causes this parameter to become inactive, with the maximum number of changes then set by parameter~67.
69	use_displacement_height	1		add displacements to orographic grid if = 1, and reduce displacement slope near origin to parameter~70
82	roughness_analysis	1	none	rou analysis version: 0=old, =1 use spiderweb with old rou maps
97	water_roughness_length	0.0002 ($2\times10^{-4}$)	m	water roughness length used in program

Parameter Sets #

Pre-defined parameter sets corresponding to WAsP versions:

Parameter Set	Profile Model	Terrain Analysis
`WAsP_11.4`	-1 (c_g=1.65, powerlaw)	0 (classic)
`WAsP_12.6`	1 (with baroclinicity)	0 (classic)
`WAsP_12.7`	1 (with baroclinicity)	1 (spider)
`WAsP_12.8` / `WAsP_12.10`	3 (sectorwise stability + baroclinicity)	1 (spider)

See also

pywasp.wasp.Config: API reference for the Config class.
pywasp.wasp.Climate.set_profile_model(): Set the atmospheric profile model.
pywasp.wasp.Terrain.set_terrain_analysis(): Set the terrain analysis method.