potential_vorticity_barotropic

metpy.calc.potential_vorticity_barotropic(heights, u, v, dx, dy, lats, dim_order='yx')

Calculate the barotropic (Rossby) potential vorticity.

\[PV = \frac{f + \zeta}{H}\]

This formula is based on equation 7.27 [Hobbs2006].

Parameters:

• heights ((M, N) ndarray) – atmospheric heights
• u ((M, N) ndarray) – x component of the wind
• v ((M, N) ndarray) – y component of the wind
• dx (float) – The grid spacing in the x-direction
• dy (float) – The grid spacing in the y-direction
• lats ((M, N) ndarray) – latitudes of the wind data

Returns:

(M, N) ndarray – barotropic potential vorticity