Figure 2
From: Persistent extreme ultraviolet irradiance in Antarctica despite the ozone recovery onset
The persistently low values of the total ozone column in late spring favor extremes of UV radiation over the Antarctic periphery. (a) Changes from 1996–2005 to 2011–2020 in Antarctic total ozone column (TOC) values averaged from 1 September to 15 October. (b) Changes from 1996–2005 to 2011–2020 in Antarctic TOC values averaged from 16 October to 30 November. (c) Daily estimates of the TOC values over King George Island averaged over two periods: 1996–2005 (blue line) and 2011–2020 (red line). (d) Progress of TOC values averaged from 1 September to 15 October (red line) and from 16 October to 30 November (blue line). (e) Number of days with “very low” TOC values (defined according to the 10th percentile) counted over two periods: from 1 September to 15 October (red line) and from 16 October to 30 November (blue line). (f) Number of days with TOC values lower than 220 Dobson units (DU) counted over two periods: from 1 September to 15 October (red line) and from 16 October to 30 November (blue line). Bold lines in plots (d–f) show 11-year centered moving averages. Data from the TOMS instrument on the Earth Probe satellite and from the OMI instrument onboard the Aura satellite were used in plots (a,b). Data from the Multi Sensor Reanalysis (MSR2) were used in plots (c–f). The plots were generated using Python’s Matplotlib library71.
