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Module: atmosphericmoisture atmosphericmoisture.py

Functions related to the thermodynamics of atmospheric moisture

Imported modules   
import Numeric
Functions   
dewpointdepression2rh
q2e
rh2shum
rh2w
saturation_mixing_ratio
saturation_pressure
saturation_pressure_over_ice
saturation_pressure_over_water
  dewpointdepression2rh 
dewpointdepression2rh (
        dpdp,
        P,
        T,
        )

Get the relative humidity from the dew-point depression

Arguments:

dpdp
Dew point depression (K)
P
Pressure (Pa)
T
Temperature (K)
  q2e 
q2e ( q,  P )

Get the partial vapour pressure from specific humidity

Arguments:

q
Specific humidity
P
Pressure (Pa)
  rh2shum 
rh2shum (
        rh,
        P,
        T,
        )

Get the specific humidity from the relative humidity

Arguments:

rh
Relative humidity (%)
P
Pressure (Pa)
T
Temperature (K)
  rh2w 
rh2w (
        rh,
        P,
        T,
        )

Get the mixing ratio from the relative humidity

Arguments:

rh
Relative humidity (%)
P
Pressure (Pa)
T
Temperature (K)
  saturation_mixing_ratio 
saturation_mixing_ratio ( P,  T )

Saturation mixing ratio from temperature and pressure

See Wallace and Hobbs

Arguments:

P
Presure (Pa)
T
Temperature (K)
  saturation_pressure 
saturation_pressure ( T )

Saturation pressure (Pa) from temperature

Consider the cases over water and ice, according to the temperature involved Do not consider subcooled water at all.

Arguments:

T
Temperature (K)
  saturation_pressure_over_ice 
saturation_pressure_over_ice ( T )

Saturation pressure (Pa) over ice

See Bohren, Albrecht (2000), pages 197-200

Arguments:

T
Temperature (K)
  saturation_pressure_over_water 
saturation_pressure_over_water ( T )

Saturation pressure (Pa) over water

See Bohren, Albrecht (2000), pages 197-200

Arguments:

T
Temperature (K)

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