pvtend.sh_ops.laplacian_sh

pvtend.sh_ops.laplacian_sh(field: ndarray, lat: ndarray, lon: ndarray, R_earth: float = 6371000.0) → ndarray[source]

Spherical Laplacian of a scalar field via spherical harmonics.

Parameters:

  • field – Scalar, shape (nlat, nlon).

  • lat – Latitudes in degrees, ascending.

  • lon – Longitudes in degrees.

  • R_earth – Earth radius in metres.

Returns:

∇²f with the same shape as field.