def mpl_get_cb_bound_below_plot(ax):
    """ Return the coordinates for a colorbar axes below the provided axes
    object. Take into account the changes of the axes due to aspect ratio
    settings.

    Important: Use only AFTER fig.subplots_adjust(...)

    """
    position = ax.get_position()
    figW, figH = ax.get_figure().get_size_inches()
    fig_aspect = figH / figW
    box_aspect = ax.get_data_ratio()
    pb = position.frozen()
    pb1 = pb.shrunk_to_aspect(box_aspect, pb, fig_aspect).bounds
    ax_size = ax.get_position().bounds
    sizes = [ax_size[0], ax_size[1], pb1[2], 0.03]
    return sizes
