metpy.calc.brunt_vaisala_period(heights, potential_temperature, axis=0)[source]

Calculate the Brunt-Vaisala period.

This function is a helper function for brunt_vaisala_frequency that calculates the period of oscilation as in Exercise 3.13 of [Hobbs2006]:

\[\tau = \frac{2\pi}{N}\]

Returns NaN when \(N^2 > 0\).

  • heights (array-like) – One-dimensional profile of atmospheric height
  • potential_temperature (array-like) – Atmospheric potential temperature
  • axis (int, optional) – The axis corresponding to vertical in the potential temperature array, defaults to 0.

array-like – Brunt-Vaisala period.