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Old June 18th 09, 08:08 PM posted to uk.sci.weather
Alastair Alastair is offline
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First recorded activity by Weather-Banter: Mar 2006
Posts: 1,594
Default Phew that was a close one

On Jun 18, 6:01*pm, Weatherlawyer wrote:

You have proof of this ice age or is it some vacuous spin drift to aid
the lamentable in search of the unprofitable?


There is plenty of proof. How do you think the valleys in Wales and
Scotland got so wide? Perhaps you think they were caused by Noah's
flood draining away. Or the eratics, ganite boulder found on
limestone that could only have been carried there by ice. Finally the
glacial moraines, whch are piles of rock formed by melting glaciers.
You can see them being created in Iceland, and find them in Scotland.

None the less the fact remains to be seen how any ice got there
bearing in mind before such ice ages there was one presumes 6 months
daylight at a time as per usual r is there some proff of things going
otherwise?


Although the Earth as a whole has 6 months of daylight, the wobble of
the Earth's axis, the eccentricity of its orbit, and the precession of
the seasons means that sometimes the northern hemisphere (NH) receives
less solar energy than the southern hemisphere (SH) and so the ice
sheets grow there. When the SH is colder the ice sheets can't grow so
easily because of the Southern Ocean. Snow doesn't lie on sea water.
So with less ice around globally we come out of the ice age again.
These astronomical features are called Croll/Milankovitch cycles.
James Croll got himself a job as a janitor at the Royal Technical
College, Glasgow so that he could use the library there.

HTH,

Cheers, Alastair.