ARTS built-in documentation server

Workspace Method z_fieldFromHSE

Description

Altitudes to fulfil hydrostatic equilibrium.

The method applies hydrostatic equilibrium, considering the effect
of water vapour (but not liquid or ice water). Several variables
are hard-coded and the method is only valid for the Earth

The output is an update of z_field. This variable is expected to
contain approximative altitudes when calling the function. The
altitude matching p_hse is kept constant. Other altitudes are
basically arbitrary, but good estimates give quicker calculations.

The calculations are repeated until the change in altitude is below
z_hse_accuracy. An iterative process is needed as gravity varies
with altitude.

The values in lat_grid must be "geophysical" latitudes. For 1D,
this method requires that the length of lat_grid is 1.

As a last step, it is checked that no gap between z_surface and
z_field has been genereted.

Authors: Patrick Eriksson

Synopsis

z_fieldFromHSE(

z_field, atmosphere_dim, p_grid, lat_grid, lon_grid, abs_species, t_field, vmr_field, r_geoid, z_surface, basics_checked, p_hse, z_hse_accuracy )

Variables

OUT	z_field	(Tensor3)	The field of geometrical altitudes.
IN	atmosphere_dim	(Index)	The atmospheric dimensionality (1-3).
IN	p_grid	(Vector)	The pressure grid.
IN	lat_grid	(Vector)	The latitude grid.
IN	lon_grid	(Vector)	The longitude grid.
IN	abs_species	(ArrayOfArrayOfSpeciesTag)	Tag groups for scalar gas absorption.
IN	t_field	(Tensor3)	The field of atmospheric temperatures.
IN	z_field	(Tensor3)	The field of geometrical altitudes.
IN	vmr_field	(Tensor4)	VMR field.
IN	r_geoid	(Matrix)	Geoid radius.
IN	z_surface	(Matrix)	The surface altitude.
IN	basics_checked	(Index)	OK-flag for basic variables and grids.
IN	p_hse	(Numeric)	Reference pressure calculation of hydrostatic equilibrium.
IN	z_hse_accuracy	(Numeric)	Minimum accuracy for calculation of hydrostatic equilibrium.