2017 total column ozone anomalies from GOME-2 measurements with respect to the 1998-2008 mean determined from the merged multi-sensor data combining GOME, SCIAMACHY, and GOME-2

Time-series of annual mean total ozone in four zonal bands (a-d) and polar (60°-90°) total ozone in March (NH) and October (SH) . In March (NH) and October (SH) are the months when polar ozone losses usually are largest. Data are from WOUDC (World Ozone and Ultraviolet Radiation Data Centre) ground-based measurements combining Brewer, Dobson, SAOZ (Système D’Analyse par Observations Zénithales), and filter spectrometer. All six datasets have been bias corrected by subtracting averages from the reference period 1998-2008 and adding the multiple data mean from the same period. The dotted grey lines in each panel show the average ozone level from 1970 to 1979 calculated from the WOUDC data. All data from 2017 are preliminary.

These 3 images are cross sections of the Antarctic ozone hole on different dates, 1st August, 14th September and the 25th of September respectively. The red area is ozone concentrations, where the redder the colour the more ozone.

Ozone total column data taken by the GOME-2 instrument on Metop-A and Metop-B

https://atmos.eoc.dlr.de

Size of the ozone hole over Antarctica from 1/7 to 31/12 for the years 2002-2017 (2017 in red, 2015 in blue and 2002 in green). The size is defined as the area south of 62-90S with ozone total columns below 220 DU. The data are taken from the CAMS interim reanalysis (2003-2016), the CAMS NRT (Near Real Time) forecast (2017) and ERA5 (2002)

http://atmosphere.copernicus.eu

Average temperatures at 50 hPa (20 km) over Antarctica from 1/1 to 31/12 for the years 2002-2017

http://atmosphere.copernicus.eu

In 2004, the maximum ozone hole occurred on September 22, 2004. This image was measure by OMI aboard the Aura satellite.

https://svs.gsfc.nasa.gov

Total ozone measurements

This still shows the maximum stratospheric ozone hole over the Antarctic for 1985.

https://svs.gsfc.nasa.gov