easyclimate.physics.temperature.potential_temperature¶

Potential Temperature

Functions¶

`calc_potential_temperature`(→ xarray.DataArray)	Calculate the potential temperature for dry air.
`calc_potential_temperature_vertical`(→ xarray.DataArray)	Calculate the potential temperature for vertical variables.

Module Contents¶

easyclimate.physics.temperature.potential_temperature.calc_potential_temperature(temper_data: xarray.DataArray, pressure_data: xarray.DataArray, pressure_data_units: Literal['hPa', 'Pa', 'mbar'], kappa: float = 287 / 1005.7) → xarray.DataArray¶

Calculate the potential temperature for dry air.

Uses the Poisson equation to calculation the potential temperature given pressure and temperature.

\[\theta = T \left( \frac{p_0}{p} \right) ^\kappa\]

Parameters¶

temper_data: xarray.DataArray.: Air temperature.
pressure_data: xarray.DataArray.: The pressure data set.
pressure_data_units: str.: The unit corresponding to pressure_data value. Optional values are hPa, Pa.
kappa: float, default: 287/1005.7.: Poisson constant \(\kappa\).

Note

Poisson constant - Glossary of Meteorology

Returns¶

Potential temperature, units according to temper_data.: xarray.DataArray.

Reference¶

Potential temperature - Glossary of Meteorology
Potential-temperature.pdf
大气位温、相当位温、饱和相当位温、静力稳定度
Bolton, D. (1980). The Computation of Equivalent Potential Temperature. Monthly Weather Review, 108(7), 1046-1053. https://journals.ametsoc.org/view/journals/mwre/108/7/1520-0493_1980_108_1046_tcoept_2_0_co_2.xml

Parameters¶

temper_data: xarray.DataArray.: Air temperature.
vertical_dim: str.: Vertical coordinate dimension name.
vertical_dim_units: str.: The unit corresponding to the vertical p-coordinate value. Optional values are hPa, Pa, mbar.
kappa: float, default: 287/1005.7.: Poisson constant \(\kappa\).

Note

Poisson constant - Glossary of Meteorology

Returns¶

Potential temperature, units according to temper_data.: xarray.DataArray.