- Joined
- Jan 28, 2013
- Messages
- 94,823
- Reaction score
- 28,342
- Location
- Williamsburg, Virginia
- Gender
- Male
- Political Leaning
- Independent
He has used data since 1900.
Why hasn't he used data using ice core samples that track back until 4000 BC?
Do you know how to insert graphics from a PDF? I could show you that data. (The data might have reached as far back as 40000 BC, but I am unsure)
Perhaps because ice core samples aren't a good temperature proxy.eace