def advas_prof(step):
return _scale_prof(step, step.rprof['<STR_LIT>']), None<EOL>
Scaled upward advection.

    This computation takes sphericity into account if necessary.

    Args:
        step (:class:`~stagpy.stagyydata._Step`): a step of a StagyyData
            instance.
    Returns:
        tuple of :class:`numpy.array` and None: the scaled upward advection.
        The second element of the tuple is None.