exner_function#
- metpy.calc.exner_function(pressure, reference_pressure=<Quantity(1000.0, 'millibar')>)[source]#
Calculate the Exner function.
\[\Pi = \left( \frac{p}{p_0} \right)^\kappa\]This can be used to calculate potential temperature from temperature (and visa-versa), since:
\[\Pi = \frac{T}{\theta}\]- Parameters:
pressure (
pint.Quantity
) – Total atmospheric pressurereference_pressure (
pint.Quantity
, optional) – The reference pressure against which to calculate the Exner function, defaults to metpy.constants.P0
- Returns:
pint.Quantity
– Value of the Exner function at the given pressure