Historic warm phases 1000 & 2000 years ago
On Thursday, October 18, 2012 10:39:34 PM UTC+1, Stephen Davenport wrote:
On Thursday, October 18, 2012 8:32:16 PM UTC+1, Steve Jackson wrote:
Stephen, I hope my A level students will rationalise that warming in
Scandinavia might just be more than a localised event, mirrored
perhaps in the UK, so certainly of continental proportions, long
before fossil fuel burning became an issue.
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Well, I hope they're smart enough to notice a faulty syllogism that concludes the *certainty* of a continent-wide phenomenon based on flimsy premises of "might just be" and "mirrored perhaps". And "continental proportions" still ain't global.
Stephen.
I am bemused by people (not just Steve) using past variations in the climate to justify sceticism over global warming.
I would hope everyone on USW would accept:-
1. The earth has warmed over the last 100 years
2. CO2 is a greenhouse gas and mankind has been pumping it into the atmosphere.
The only real arguments should be over the relative importance of other factors influencing the Earths climate and positive/negative feedback mechanisms. As these are poorly understood then it seems commonsense that attempts should be made to minimise mankinds affect on the atmosphere.
Saying the Earth's been warmer/colder in the past is irrelevant, of course it has!
Graham
Penzance
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