def compute_turbulence_intensity(mean_col, std_col):
    """
    Compute turbulence intensity

    Args:
        mean_col(:obj:`array`): array containing the wind speed mean  data; units of m/s
        std_col(:obj:`array`): array containing the wind speed standard deviation data; units of m/s

    Returns:
        :obj:`array`: turbulence intensity, (unitless ratio)
    """
    return std_col / mean_col