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by danielbigham
2553 days ago
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One challenge with using things like trees to estimate long-ago temperatures is that you have to build a complex mathematical model to map to temperature, and I'm aware of at least one famous study that got the math wrong, to the point of being potentially suspicious. (But I haven't studied this stuff enough to know whether or not other proper studies exist) |
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As it turns out, that's what you have to do with fairly recent temperatures measured with thermometers that aren't located in the same places, too.