uxarray.UxDataArray.zonal_anomaly

UxDataArray.zonal_anomaly(lat=(-90, 90, 10), conservative=False)

Compute the zonal anomaly: each face value minus the mean of its latitude band.

Returns a new UxDataArray with the same dimensions as the input, where each face holds its original value minus the zonal mean of the latitude band it belongs to.

Parameters:

• lat (tuple or array-like, default=(-90, 90, 10)) –

  Latitude band specification:

  • tuple (start, end, step): band edges via np.linspace(start, end, n)

  • array-like: explicit band edges in degrees

• conservative (bool, default=False) – If True, uses area-weighted band means and blends across bands for faces that straddle a band boundary, reusing the face-band weight matrix computed for zonal_mean so no geometry is duplicated. If False, assigns each face to a band by its centroid latitude.

Returns:

Same dimensions as input with per-face band mean subtracted.

Return type:

UxDataArray

Examples

>>> uxds["var"].zonal_anomaly()
>>> uxds["var"].zonal_anomaly(lat=(-60, 60, 5), conservative=True)