atmospheric_fieldHydrostaticPressure

Workspace.atmospheric_fieldHydrostaticPressure(self, atmospheric_field: pyarts3.arts.AtmField | None = None, gravity_operator: pyarts3.arts.NumericTernaryOperator | None = None, altitude_grid: pyarts3.arts.AscendingGrid | None = None, p0: pyarts3.arts.GeodeticField2 | pyarts3.arts.Numeric | None = None, fixed_specific_gas_constant: pyarts3.arts.Numeric | None = None, fixed_atmospheric_temperature: pyarts3.arts.Numeric | None = None, hydrostatic_option: pyarts3.arts.String | None = None) → None

Add the hydrostatic pressure to the atmospheric field

The field must already be able to compute temperature as a function of altitude, latitude, and longitude.

If a positive fixed_specific_gas_constant is not provided, the field must also consist of correct volume mixing ratios so that the mass of an average molecule can be computed.

The first altitude in altitude_grid is used as the altitude of the p0 grid. The extrapolation outside of this range simply uses the formalism of the select hydrostatic_option.

Note

The gradient changes only at the grid points of the altitude_grid. Please make it dense enough to avoid missing features. A recommendation is to extract the altitude_grid directly from the temperature field.

Also be aware that missing VMRs for important species, e.g., \(\textrm{N}_2\) or \(\textrm{O}_2\), will lead to incorrect results. The mean molecular mass need these VMRs, so if the VMRs are missing, the pressure will not be correct either.

Author: Richard Larsson

Parameters:

  • atmospheric_field (AtmField, optional) – An atmospheric field in ARTS. See atmospheric_field, defaults to self.atmospheric_field [INOUT]

  • gravity_operator (NumericTernaryOperator, optional) – The gravity operator. See gravity_operator, defaults to self.gravity_operator [IN]

  • altitude_grid (AscendingGrid, optional) – An ascending list of altitude. Often related to a field or a profile. See altitude_grid, defaults to self.altitude_grid [IN]

  • p0 (GeodeticField2,Numeric) – Lowest altitude pressure field. \(P_0\) above. [IN]

  • fixed_specific_gas_constant (Numeric, optional) – Specific gas constant if larger than 0. Defaults to -1 [IN]

  • fixed_atmospheric_temperature (Numeric, optional) – Constant atmospheric temprature if larger than 0. Defaults to -1 [IN]

  • hydrostatic_option (String, optional) – Computational option for levels. See HydrostaticPressureOption for valid options. Defaults to "HydrostaticEquation" [IN]