atmoslib 2.0.0

Python library for atmospheric thermodynamic calculations

atmoslib

Python library for atmospheric thermodynamics and microwave attenuation calculations.

Installation

pip install atmoslib

Usage

import numpy as np
import atmoslib

t = np.array([293.15, 283.15, 273.15])    # temperature (K)
p = np.array([101325.0, 95000.0, 90000.0]) # pressure (Pa)
q = np.array([0.010, 0.005, 0.001])        # specific humidity (kg/kg)

tw = atmoslib.wet_bulb_temperature(t, p, q)

All inputs accept scalars or NumPy arrays of any shape (broadcasting follows NumPy rules).

Available functions

Function	Description
wet_bulb_temperature(t, p, q)	Wet-bulb temperature (K)
vapor_pressure(p, q)	Vapor pressure of water (Pa)
saturation_vapor_pressure(t)	Saturation vapor pressure (Pa, Goff-Gratch, liquid/ice/mixed)
relative_humidity(t, p, q)	Relative humidity over liquid water (1)
absolute_humidity(t, vp)	Absolute humidity (kg/m³)
dew_point_temperature(t, rh)	Dew-point temperature (K, Magnus)
mixing_ratio(vp, p)	Mixing ratio (kg/kg)
latent_heat_of_vaporization(t)	Temperature-dependent latent heat of vaporization (J/kg)
virtual_temperature(t, q)	Virtual temperature (K)
potential_temperature(t, p)	Potential temperature (K)
equivalent_potential_temperature(t, p, q)	Equivalent potential temperature (K, linearized approx.)
air_density(t, p, mr)	Moist-air density (kg/m³)
adiabatic_lwc_gradient(t, p)	Adiabatic vertical gradient of LWC at cloud base (kg/m³/m)
hydrostatic_pressure(t, q, z, p_sfc)	Pressure profile from surface value via hypsometric equation (Pa)
geometric_height(gph)	Geopotential height to geometric height (m, ECMWF)
isa_altitude(t, p)	Altitude from pressure and temperature (m, ISA)
c2k(t) / k2c(t)	Celsius ↔ Kelvin conversion
liquid_water_specific_attenuation(t, f)	Cloud liquid water specific attenuation ((dB km⁻¹)/(g m⁻³), ITU-R P.840)
gas_specific_attenuation(t, p, e, f)	Dry-air + water-vapor specific attenuation (dB km⁻¹, ITU-R P.676)

See the docstrings for argument details and references.

License

MIT