But as of the latter part of September 2006, the ozone readings in the Earth's atmosphere peaked out higher than ever before.
Although atmospheric scientist Paul Newman at NASA's Goddard Space Flight Center claimed it wasn't due to 'human activity', scientific research dating back to 1999 warned of just such a problem when alumina particles are ejected in jet plumes, which is one of the methods for dispersing weather modification materials into the atmosphere.
Below is an excerpt from that study with the accompanying link, as well as excerpts from the ozone depletion article and from an article published by NASA)
(excerpt below from: October 2006, New Scientist.com:)
Ozone hole reaches record proportions
Just when we thought it was getting smaller, the hole in the ozone layer has reached record proportions.
Between 21 and 30 September, the average area of the hole reached 27.5 million square kilometres, according to scientists monitoring ozone levels over the South Pole using NASA's Aura satellite and balloon-borne instruments. This marks an increase of roughly 3.9 million square kilometres from last year.(excerpt below from Catalogue of Documents:)
The goal of this study is to quantify uptake of HO and HNOby and estimate their residence time on alumina particles in Athena-2 rocket plumes. This study uses in situ measurements made in the lower stratosphere with the NASA WB-57F high-altitude aircraft on 24 September 1999
We speculate that the HO coverage remaining on alumina particles accelerates the ClONO+ HCl → Cl + HNO reaction, thus leading to a larger than previously thought global ozone loss to solid-fueled rocket emissions, especially if at least several percent of emitted alumina mass are in submicron particles.
(excerpt below from NASA:)
NASA and NOAA Announce Ozone Hole is a Double Record Breaker
NASA and National Oceanic and Atmospheric Administration (NOAA) scientists report this year's ozone hole in the polar region of the Southern Hemisphere has broken records for area and depth.
The recently completed 2006 World Meteorological Organization/United Nations Environment Programme Scientific Assessment of Ozone Depletion (clicking link opens PDF file) concluded the ozone hole recovery would be masked by annual variability for the near future and the ozone hole would fully recover in approximately 2065.