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¶
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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.)
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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.)
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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
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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
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epygram.profiles.
flux2masspressures
(pi_tilde, vertical_mean, Ptop=0.0)[source]¶ Converts pressures at flux levels to mass levels.
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epygram.profiles.
mass2fluxpressures
(pi, vertical_mean, Ptop=0.0)[source]¶ Converts pressures at mass levels to flux levels.
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epygram.profiles.
flux2massheights
(H_tilde)[source]¶ Converts altitudes at flux levels to mass levels.
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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)
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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.)