Dome A, is one of the harshest environments on Earth.To evaluate the characteristics of near-surface O₃, continuous observations were carried out in 2016. The results showed different patterns between coastal and inland Antarctic areas that were characterized by high concentrations in cold seasons and at night. Short-range transport accounted for the O₃ enhancement events (OEEs) during summer at DA, rather than efficient local production, which is consistent with previous studies.