(note: excerptbelow from the 2007 GEO-4 Report, page 73)
The “hole” over the Antarctic in the stratospheric ozone layer that gives protection from harmful ultraviolet radiation [for 2006 was] the largest ever.
Emissions of ozone-depleting substances (ODS) have decreased over the last 20 years, yet the concern about the state of stratospheric ozone still persists.
(image upper right of southern ozone hole, from ScienceDaily.com)
Although emissions of ODS (ozone-depleting substances) have decreased over the last 20 years, it is estimated that the ozone layer over the Antarctic will not fully recover until between 2060 and 2075, assuming full Montreal Protocol compliance.
(note: excerpt below from ScienceDaily.com)
2007 Ozone Hole 'Smaller Than Usual'
The ozone hole over Antarctica has shrunk 30 percent as compared to last year's record size. According to measurements made by ESA’s Envisat satellite, this year’s ozone loss peaked at 27.7 million tonnes, compared to the 2006 record ozone loss of 40 million tonnes. (image left example of global ozone levels, from Climate Prediction Center/NWS)
(note: following excerpt from Theozonehole.com)
Early August 2007 saw the largest ozone hole recorded for [that] time of year, although at the same time very high ozone levels existed over the northern Antarctic Peninsula.
The vortex was more circular in mid September but returned to an elliptical shape and initially warmed slowly. In mid September its area reached a maximum of just over 24 million square kilometres, but [then] declined to 3 million square kilometres, close to the average for the last decade at this time of year. The vortex [was] expected to continue to decline over the next week.