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Up2Late Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Feb-09-06 09:53 PM
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Climate 'warmest for millennium' (BBC News)
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Edited on Thu Feb-09-06 10:27 PM by Up2Late
(I'm sure the Global Warming deniers will still say 1,200 Years back is still not enough, but I guess just add this study to the mounting pile of evidence)

Thursday, 9 February 2006, 19:25 GMT

Climate 'warmest for millennium'


By Paul Rincon
BBC News science reporter

In the late 20th Century, the northern hemisphere experienced its most widespread warmth for 1,200 years, according to the journal Science.

The findings support evidence pointing to unprecedented recent warming of the climate linked to greenhouse emissions. University of East Anglia researchers measured changes in fossil shells, tree rings, ice cores and other past temperature records or "proxies".

They also looked at people's diaries from the last 750 years. Timothy Osborn and Keith Briffa of UEA analysed instrument measurements of temperature from 1856 onwards to establish the geographic extent of recent warming.

Then they compared this data with evidence dating back as far as AD 800. The analysis confirmed periods of significant warmth in the Northern Hemisphere from AD 890 - 1170 (the so-called "Medieval Warm Period") and for much colder periods from 1580 - 1850 (the "Little Ice Age").

(more at link above)

<http://news.bbc.co.uk/2/hi/science/nature/4698652.stm >
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