epygram.profiles — Functions on vertical profiles¶
This module contains functions to:
to convert vertical coordinates systems from the one to another;
compute air specific gas constant R according to specific humidity and hydrometeors.
to plot vertical profiles.
Conversion¶
- epygram.profiles.hybridP2fluxpressure(A, B, Psurf)[source]¶
Computes and returns the pressure at flux levels defined by hybrid-pressure coefficients. Coefficients are assumed to define flux levels.
- Parameters
A – table of A coefficients
B – table of B coefficients
Psurf – surface pressure in Pa.
A and B must not contain the first coefficient (A=B=0.)
- epygram.profiles.hybridP2masspressure(A, B, Psurf, vertical_mean)[source]¶
Computes and returns the pressure at mass levels defined by hybrid-pressure coefficients. Coefficients are assumed to define flux levels.
- Parameters
A – table of A coefficients
B – table of B coefficients
Psurf – surface pressure in Pa.
vertical_mean – kind of vertical averaging
A and B must not contain the first coefficient (A=B=0.)
- epygram.profiles.hybridH2fluxheight(A, B, Zsurf, conv2height=False)[source]¶
Computes and returns the altitude at flux levels defined by hybrid-height coefficients. Coefficients are assumed to define flux levels.
- Parameters
A – table of A coefficients
B – table of B coefficients
Zsurf – surface altitude in m.
conv2height – True to compute height instead of altitude
A and B must include the underground level
- epygram.profiles.hybridH2massheight(A, B, Zsurf, conv2height=False)[source]¶
Computes and returns the altitude at mass levels defined by hybrid-height coefficients. Coefficients are assumed to define flux levels.
- Parameters
A – table of A coefficients
B – table of B coefficients
Zsurf – surface altitude in m.
conv2height – True to compute height instead of altitude
A and B must include the underground level
- epygram.profiles.flux2masspressures(pi_tilde, vertical_mean, Ptop=0.0, LAPRXPK=True, LAPRXPK_for_first_level=True)[source]¶
Converts pressures at flux levels to mass levels.
- epygram.profiles.mass2fluxpressures(pi, vertical_mean, Ptop=0.0)[source]¶
Converts pressures at mass levels to flux levels.
- epygram.profiles.flux2massheights(H_tilde)[source]¶
Converts altitudes at flux levels to mass levels.
- epygram.profiles.pressure2altitude(R, T, vertical_mean, pi=None, pi_tilde=None, Pdep=None, Phi_surf=None)[source]¶
Converts a pressure profile to mass-levels altitude (= height above ground if Phi_surf == 0).
The pressure can be given at mass levels (pi) or flux levels (pi_tilde), or both (assuming they are consistent), with unit: Pa.
- Parameters
pi – mass levels pressure
pi_tilde – flux levels pressure
R – table of R = specific gas constant (J/kg/K)
T – table of Temperature (K)
vertical_mean – kind of vertical averaging
Pdep – table of Pressure departure: P-Pi, where P is the hydrostatic pressure and Pi the Non-Hydrostatic pressure (Pa). 0. if Hydrostatic (default)
Phi_surf – surface geopotential (J/kg)
- epygram.profiles.hybridP2altitude(A, B, R, T, Psurf, vertical_mean, Pdep=None, Phi_surf=None, Ptop=0.0)[source]¶
Computes the altitude of mass levels defined by hybrid-pressure coefficients. (= height above ground if Phi_surf == 0).
- Parameters
A – table of A coefficients
B – table of B coefficients
Psurf – surface pressure in Pa.
R – table of R = specific gas constant (J/kg/K)
T – table of Temperature (K)
vertical_mean – kind of vertical averaging
Pdep – table of Pressure departure: P-Pi, where P is the hydrostatic pressure and Pi the Non-Hydrostatic pressure (Pa). 0. if Hydrostatic (default)
Phi_surf – surface geopotential (J/kg)
A and B must not contain the first coefficient (A=B=0.)