Ozone layer depletion is accelerating globally. The
worst ozone layer depletion is expected to occur during the next
five to ten years. We may be in for even nastier surprises than
what our scientists predict. Certainly, a clear pattern towards
greater crisis has become a permanent feature over the past decade.
The World Meteorological Organization (WMO) reported
that in 1994 the ozone hole over Antarctica opened up two weeks
earlier than in 1993, with a record low of over 70% ozone depletion.
The previous record was set in 1993 with just over 60% ozone loss."
On March 3O, 1995, scientists from the Second European
Stratospheric Arctic and Mid latitude experiment (SESAME) reported
alarming thinning of the ozone layer over the Arctic, Siberia
and Scandinavia. In some altitudes ozone levels were 50% below
those previously observed. On average, a 20-30 percent reduction
in Arctic ozone levels was reported. The British newspaper, The
Guardian , headlined its front page story on the SESAME Report
as the "First Ozone Hole Found Over Arctic".
Recently released data from the US National Aeronautics
and Space Administration (NASA) indicate that the 1996 Antarctic
ozone hole peaked at a record 10 million square miles - an area
greater than the total surface area of North America. According
to Dr. Rumen Bojkov, special advisor to the World Meteorological
Organization, ozone levels over the Antarctic are now
at the lowest level possible; all of the ozone subject to depletion
by existing chemicals has been destroyed.