thickness_hydrostatic_from_relative_humidity#
- metpy.calc.thickness_hydrostatic_from_relative_humidity(pressure, temperature, relative_humidity, bottom=None, depth=None)#
Calculate the thickness of a layer given pressure, temperature and relative humidity.
Similar to
thickness_hydrostatic, this thickness calculation uses the pressure, temperature, and relative humidity profiles via the hypsometric equation with virtual temperature adjustment\[Z_2 - Z_1 = -\frac{R_d}{g} \int_{p_1}^{p_2} T_v d\ln p,\]which is based off of Equation 3.24 in [Hobbs2006]. Virtual temperature is calculated from the profiles of temperature and relative humidity.
This assumes a hydrostatic atmosphere.
Layer bottom and depth specified in pressure.
- Parameters
pressure (
pint.Quantity) – Atmospheric pressure profiletemperature (
pint.Quantity) – Atmospheric temperature profilerelative_humidity (
pint.Quantity) – Atmospheric relative humidity profile. The relative humidity is expressed as a unitless ratio in the range [0, 1]. Can also pass a percentage if proper units are attached.bottom (
pint.Quantity, optional) – The bottom of the layer in pressure. Defaults to the first observation.depth (
pint.Quantity, optional) – The depth of the layer in hPa. Defaults to the full profile if bottom is not given, and 100 hPa if bottom is given.
- Returns
pint.Quantity– The thickness of the layer in meters
See also
thickness_hydrostatic,pressure_to_height_std,virtual_temperature,mixing_ratio_from_relative_humidityNotes
Only functions on 1D profiles (not higher-dimension vertical cross sections or grids). Since this function returns scalar values when given a profile, this will return Pint Quantities even when given xarray DataArray profiles.