Accuracy of satellite total column ozone measurements in polar vortex conditions: Comparison with ground-based observations in 1979–2013

Intercomparison of Ground- and Satellite-Based Total Ozone Data Products at Marambio Base, Antarctic Peninsula Region

“…On the other hand, the OMI(TOMS) results reported by [29] revealed much spatial variation, with an overestimation of the ground-based measurements at the Marambio Base. However, in [29], the No significant difference was found between the ratios under ozone hole and non-ozone hole conditions, but it could be observed between depleted and non-depleted profiles ( Figure 6). The ratio did not differ from 1 when the ozone profile was depleted, but it was significantly lower under non-depleted conditions.…”

“…The other studies [15,18,28] also found that in southern mid-latitudes, OMI(TOMS) agreement with ground-based instruments was in the range of 0 to −2%, with a large variability of ±6%. On the other hand, the OMI(TOMS) results reported by [29] revealed much spatial variation, with an overestimation of the ground-based measurements at the Marambio Base. However, in [29], the D099 Dobson spectrophotometer was used as the reference instrument, so the overestimation might have been caused not only by OMI(TOMS) long-term instability, but also by the D099 spectrophotometer SZA and T eff dependencies (see Section 5.2.1).…”

“…On the other hand, the OMI(TOMS) results reported by [29] revealed much spatial variation, with an overestimation of the ground-based measurements at the Marambio Base. However, in [29], the D099 Dobson spectrophotometer was used as the reference instrument, so the overestimation might have been caused not only by OMI(TOMS) long-term instability, but also by the D099 spectrophotometer SZA and T eff dependencies (see Section 5.2.1). When raw D099 data, which were not corrected for T eff , were used for comparison purposes for the period 2011-2013, overestimation by the OMI(TOMS) of ozone by about 2% on average was found.…”

“…According to [47], the most commonly used distance limit between the ground-based instrument and the satellite overpass can reach up to 150 km; however, Kuttippurath et al [29] stresses the high variability of ozone in polar regions, so a shorter distance threshold was chosen. Therefore, only the satellite overpass data within a distance of up to 100 km from the Marambio Base were further processed.…”

“…For example, Evtushevsky et al [26] and Bian et al [27] assessed the performance of a selected satellite product against a Dobson spectrophotometer at the Vernadsky Station used ground-based Dobson and Brewer data from the Syowa and Zhongshan Stations, respectively, and compared different satellite products with the Brewer spectrophotometer installed at the Zhongshan Station [28]. A long-term comparison of two selected satellite data products with various ground-based instruments located in Antarctica was provided in [29]. Although these studies only cover one point, they can be highly useful to explain the behavior of satellite instruments under the extreme ozone and climatic conditions of Antarctica.…”