def temporal_plot_features(ax):
    """Set the temporal plot features"""

    ax.legend(loc=2)
    ax.set_xlabel('year')
    ax.set_ylabel('interhemispheric ocean\ntemperature difference (K)')
    ax.tick_params(top='off') 
    ax.text(0.92, 0.08, '(a)', transform=ax.transAxes, fontsize=24, va='top')
    ax.axhline(y=0, color='0.5', linestyle='--', linewidth=0.5)
    ylim = ax.get_ylim()

    return ylim