def saturated_vapour_pressure_average(svp_24_max, svp_24_min):
    """
    Average saturated vapour pressure based on two saturated vapour pressure values
    calculated using minimum and maximum air temperature respectively. This is preferable
    to calculating saturated vapour pressure using the average air temperature, because
    of the strong non-linear relationship between saturated vapour pressure and air
    temperature

    .. math ::
        e_{s}=\frac{e^{0}\left(T_{max}\right)+e^{0}\left(T_{mon}\right)}{2}

    Parameters
    ----------
    svp_24_max : float
        daily saturated vapour pressure based on maximum air temperature
        :math:`e_{s,max}`
        [mbar]
    svp_24_min : float
        daily saturated vapour pressure based on minimum air temperature
        :math:`e_{s,min}`
        [mbar]

    Returns
    -------
    svp_24 : float
        daily saturated vapour pressure
        :math:`e_{s,24}`
        [mbar]

    """
    return (svp_24_max + svp_24_min)/2