Rare clouds over Antarctica suggest global warming

[lovuian]

http://www.abc.net.au/news/newsitems/200608/s1702788.htm

Scientists say the appearance of rare clouds over Antarctica could be an indicator of global warming.

Dr Andrew Klekociuk from the Australian Antarctic Division says nacreous clouds are naturally-occurring, and indicate extremely cold temperatures in the stratosphere.

The stratosphere is between eight and 50 kilometres above the earth's surface, and gets colder as temperatures closer to earth get warmer.

Dr Klekociuk says as global warming increases, temperatures in the stratosphere should drop, and that has been reflected in data collected over the last 25 years
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Planet Earth's own temperature regulator...Am I wrong in thinking this is what causes ice ages???

[megatherium]

1. I think the ice ages are tied to variations in the Earth's orbit,

and tilt of the Earth's axis. These vary on timescales of thousands or tens of thousands of years. I believe these are called Milankovitch cycles.

[soothsayer]

4. So are we due? In Al Gore's movie, it sure looked like it (with or

without global warming)

[lovuian]

7. Nacreous Clouds

[kimmerspixelated]

2. I had a question

about this yesterday, I think, wondering about what exactly causes global warming to turn the other way suddenly, as in, "The Day After Tomorrow". Always been confused about that. But all of this illustrates what a delicate balance the earth is always in.

[slackmaster]

3. Link to page with nice photo

Server wouldn't allow photo to be linked to.

See http://www.atoptics.co.uk/nacr1.htm

[soothsayer]

5. Jeez, they're beautiful!

[lovuian]

6. OMG!!! its like angels in the sky rescuing

Thank you for that picture!!!