I ask because it shows this rate of warming increase is typical even before CO2 was the big deal it is now.
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Replying to @ScottAdamsSays @SteveSGoddard and
The current warming rate stands out in the global averages. All the global temp. series that include the surface show a strong warming trend since the 1970s.pic.twitter.com/p09DiwWUYU
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Replying to @ScottAdamsSays @SteveSGoddard and
The instrumental temperatures (starting 19th c) are the blade, with older paleotemp reconstructions being the stick. The original HS had a straightish stick & large uncertainty—the former getting bumpier, the latter smaller in subsequent studies (e.g. the attached plots).pic.twitter.com/xrcchIKHhL
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Replying to @priscian @ScottAdamsSays and
The text of the tweet talks about how the error bars and bumpiness of the data shrank over time, as it was used again and again. Current analyses seem to treat older data (centuries and millennia old) with the same confidence as newer data.
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Replying to @DouglasIRoberts @ScottAdamsSays and
The use of larger & larger data sets + improvement/refinement of analytical methods have produced more detail in the paleotemp series & less uncertainty. (This shouldn't be surprising after 20+ years of development; but uncertainty in reconstructed temps still > instrumental.)
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Replying to @milkchaser @ScottAdamsSays and
Depends on the study. More higher-resolution proxies means greater detail.
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Replying to @priscian @ScottAdamsSays and
I hope the detail available in the historical temperature data is more detailed than that answer, but I doubt it. I suspect that the best we can do is pinpoint a variation in temp at a single location for 100 or 1000 year blocks going back > 1 million years. Not year by year.
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Replying to @milkchaser @priscian and
To measure rate comparably, one would have to look at variation in temp over similar blocks of time. Cannot say rate of rise is faster than ever based on a 20-year rise when one cannot see 20-year blocks from 65 million years ago.
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Lindzen says we have had a similar rate of rise in the past 100 years.
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