improver.constants module
Module to contain generally useful constants.
- ABSOLUTE_ZERO = -273.15
0 Kelvin in degrees C
- CP_DRY_AIR = 1005.0
Specific heat capacity of dry air (J K-1 kg-1)
- CP_WATER_VAPOUR = 1850.0
Specific heat capacity of water vapour (J K-1 kg-1)
- DALR = -0.0098
Dry Adiabatic Lapse Rate (DALR; K m-1)
- EARTH_REPSILON = 0.62198
Repsilon, ratio of molecular weights of water and dry air (Earth; unitless)
- ELR = -0.0065
Environmental Lapse Rate (ELR; K m-1) Also known as Standard Atmosphere Lapse Rate
- LATENT_HEAT_T_DEPENDENCE = 2340.0
Latent heat temperature dependence (J K-1 kg-1); from Met Office UM. Applied to temperatures in Celsius: \(LH = 2501 - 2.34 \times 10^3 \times T(celsius)\)
- LH_CONDENSATION_WATER = 2501000.0
Latent heat of condensation of water at 0C (J kg-1)
- R_DRY_AIR = 287.0
Specific gas constant for dry air (J K-1 kg-1)
- R_DRY_AIR_MOL = 8.314
Specific gas constant for dry air per mole (J K-1 mol-1)
- R_WATER_VAPOUR = 461.6
Specific gas constant for water vapour (J K-1 kg-1)
- TRIPLE_PT_WATER = 273.16
Triple Point of Water (K)
- WATER_VAPOUR_MOLAR_MASS = 0.01801
Molar mass of water vapour (kg mol-1)