"Jack Harrison" wrote in message
.. .

"Simon S" wrote
snip
European Commissioner for Science and Research Janez Potocnik.
....said
temperatures at a 20 kilometer (12 mile) height had dropped to
an average of minus 80 degrees Celsius the lowest over the Arctic in half
a century.

Question. Might this paradoxically be a sign of global warming?

Hi Jack,

I have just found this report which backs up your idea.

Evidence suggests that global warming enhances destruction of ozone layer
By DENNIS BUECKERT
OTTAWA (CP) - Two major environmental problems once thought to be unrelated -
climate change and ozone depletion - appear to be closely linked in ways that
will delay recovery of the ozone layer, scientists say.

Growing evidence suggests that global warming favours destruction of ozone in
the stratosphere, jeopardizing the achievements of the 1987 Montreal Protocol
to protect the ozone layer. One signal of the ozone-climate link is the sharp
ozone depletion over the Arctic this winter, says Environment Canada scientist
Tom McElroy in an interview Thursday.

See below for the full article
http://cnews.canoe.ca/CNEWS/Science/...919503-cp.html

Cheers, Alastair,