In situ ozonesonde observations across nine Antarctic stations were used to validate the vertical profiles retrieved by the satellite-based Microwave Limb Sounder (MLS) instrument from 2004 to 2019. Intra-annual variations in the ozone concentration, along with the shape of the vertical profiles are well reproduced by the MLS with differences in the range of ±20%, although seasonally the differences were as high as 60%. The largest differences were also observed during the spring (September-October-November), when largescale ozone depletion takes place over Antarctica, with MLS overestimating concentrations at almost all the stations, except the northernmost stations of Marambio and Dumont d’Urville. This has implications for the estimations of ozone recovery over Antarctica based on MLS. The under-estimation or over-estimation in the MLS data caused differences up to ±1 K day⁻¹ in the estimated heating rate. For the whole dataset, a good correlation (R² > 0.9, p < 0.001) was seen at all the stations except at Maitri, where the correlation coefficient was lower but still significant (R² = 0.77, p < 0.001). These results show that although the MLS data match the in-situ observations over longer averaging periods, for individual profiles the discrepancies are much higher and need to be considered when computing the ozone impacts using MLS data.

九个南极站的原位臭氧探空仪观测被用于验证 2004 年至 2019 年间由基于卫星的微波肢体探空仪 (MLS) 仪器获取的垂直剖面。臭氧浓度的年内变化以及垂直剖面的形状尽管季节性差异高达 60%，但 MLS 可以很好地重现，差异在 ±20% 的范围内。春季（9 月-10 月-11 月）也观察到了最大的差异，当时南极洲发生大规模臭氧消耗，MLS 高估了几乎所有站的浓度，除了最北端的 Marambio 和 Dumont d'Urville 站。这对基于 MLS 的南极洲臭氧恢复估计有影响。^-1在估计的加热速率。对于整个数据集， 除 Maitri 之外的所有站点都具有良好的相关性（R ² > 0.9，p < 0.001），其相关系数较低但仍然显着（R ²  = 0.77，p < 0.001）。这些结果表明，尽管 MLS 数据在更长的平均周期内与原位观测相匹配，但对于单个剖面而言，差异要大得多，在使用 MLS 数据计算臭氧影响时需要加以考虑。