earthkit.meteo.vertical.array.height_on_hybrid_levels¶

earthkit.meteo.vertical.array.height_on_hybrid_levels(t, q, zs, sp, A, B, alpha_top='ifs', h_type='geometric', h_reference='ground', vertical_dim=0)¶

Compute the height on hybrid (IFS model) full-levels.

New in version 1.0.0

Parameters:

t (ArrayLike) – Temperature on hybrid full-levels (K). The axis corresponding to the vertical coordinate (hybrid levels) is defined by the vertical_dim parameter. The levels must be in ascending order with respect the model level number. Not all the levels must be present, but a contiguous level range including the bottom-most level must be used. E.g. if the vertical coordinate system has 137 model levels using only a subset of levels between e.g. 137-96 is allowed.
q (ArrayLike) – Specific humidity on hybrid full-levels (kg/kg). Must have the same shape, level range and order as t.
zs (ArrayLike) – Surface geopotential (m2/s2). Not used when h_type is “geopotential” and h_reference is “ground”.
sp (ArrayLike) – Surface pressure (Pa).
A (ArrayLike) – A-coefficients defining the hybrid levels. Must contain all the half-levels in ascending order with respect to the model level number.
B (ArrayLike) – B-coefficients defining the hybrid levels. Must contain all the half-levels in ascending order with respect to the model level number. Must have the same size as A.
alpha_top ({"ifs", "arpege"}, default "ifs") – Option to initialise the alpha parameters (for details see below) on the top of the model atmosphere (first half-level in the vertical coordinate system). See pressure_on_hybrid_levels() for details.
h_type ({"geometric", "geopotential"}, default "geometric") –
Type of height to compute. Default is “geometric”. Possible values are:
- ”geometric”: geometric height (m) with respect to h_reference
- ”geopotential”: geopotential height (m) with respect to h_reference
See geometric_height_from_geopotential() and geopotential_height_from_geopotential() for details.
h_reference ({"ground", "sea"}, default "ground") –
Reference level for the height calculation. Default is “ground”. Possible values are:
- ”ground”: height with respect to the ground/surface level
- ”sea”: height with respect to the sea level
vertical_dim (int) – Axis corresponding to the vertical coordinate (hybrid full-levels) in the input arrays and also in the output array. Default is 0 (first axis).

Returns:

Height (m) of hybrid full-levels with respect to h_reference. The type of height is defined by h_type (“geometric” or “geopotential”). The axis corresponding to the vertical coordinate (hybrid levels) is defined by the vertical_dim parameter.

Return type:

ArrayLike