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The ozone hole, which covers much of Antarctica, is thought to be
caused by human-produced compounds which release chlorine and
bromine.
Chemical reactions high in the atmosphere cause these gases to
destroy ozone.
The presence of the hole—actually an area of significantly reduced
ozone—means that the ultraviolet radiation from the sun reaches
Earth's surface in greater amounts.
"From Sept. 21 to 30, the average area of the ozone hole was the
largest ever observed, at 10.6 million square miles," said Paul New-
man, atmospheric scientist at NASA's Goddard Space Flight Center,
Greenbelt, Md.
If the stratospheric weather conditions had been normal, the ozone
hole would be expected to reach a size of about 8.9 to 9.3 million
square miles, about the surface area of North America.
This year also included a daily record tied with Sept. 9, 2002.
The peak size was 11.4 million square miles on Sept. 24 this year,
Newman told LiveScience.com.
"That's the record single-day average."
Newman and his colleagues averaged the last 10 days of September,
peak dates for ozone hole area, for the last quarter of century.
"We go all the way back to 1979," Newman said.
"If you go before 1979 there was no ozone hole."
SOURCE:
LiveScience.com
Originally posted by Cruizer
Look at the source website it came from. It not NASA, MSNBC, Reuters or the BBC its a green weenie sight. Lot's of propaganda there.
Originally posted by Cruizer
Look at the source website it came from. It not NASA, MSNBC, Reuters or the BBC its a green weenie sight. Lot's of propaganda there.