pvtend.ppvi.winds.psi_to_winds

pvtend.ppvi.winds.psi_to_winds(psi: ndarray, lats: ndarray, dlat: float, dlon: float) → tuple[ndarray, ndarray][source]

Rotational wind from ψ via Wu centred finite differences.

Parameters:

  • psi – Streamfunction (NL, NY, NX) [m²/s], latitude N→S.

  • lats – Latitudes [deg] of length NY (descending, N→S).

  • dlat – Grid spacing in latitude [deg].

  • dlon – Grid spacing in longitude [deg].

Returns:

Tuple (u_rot, v_rot) each (NL, NY, NX) [m/s]; the outermost latitude rows and longitude columns are NaN.