Quote:
Originally Posted by pcmc
Interesting chart, but are there really accurate records from 2200BC following the earths temperature??
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Yes there are.
In the polar ice cap cores. In the earths crust cores. To name a couple.
Sample cores tell a lot about what the climate was in history. Example, coal is formed from deposits that need tropical like climate to form. So the coal located in Canada comes from tropical forest that were there millions of years ago. How about dinosaurs? They needed warm climate to live and could not survive in Montana today but were there in the past.
So if you are asking did some weather person take the temp of the day and write it down in a book? The answer is no but the earth recorded its' own temperature history in the rocks, swamps, ice caps, etc.
ToW