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Different data set. The 10,000 year chart is only Antarctic ice cores. The 11,000 year chart is a composite of a number of temperature records - tree rings, e
by wffurr 13y ago
Different data set. The 10,000 year chart is only Antarctic ice cores. The 11,000 year chart is a composite of a number of temperature records - tree rings, etc.
- ctdonath 13y agoThe 11,000 year chart is a composite. Funny how the data takes a wild change right where a completely new data source is included.
- anon1385 13y agoYou realise that there is an entire paper in Science about how they synthesised the various temperature records? http://www.usu.edu/geo/physical/MarcottEtal_Science_2013.pdf http://www.usu.edu/geo/physical/MarcottEtal_Science_2013.pdf If you have something constructive to say about the methodology then let us know rather than making ignorant comments that tell us more about your political ideology than about the science.
- metric10 13y agoLet me guess, you're a Republican? The OP made a perfectly legitimate observation. People should be skeptical of anyone trying to prove a point by showing a graph. Thanks for posting a link to the actual science.
- ctdonath 13y agoAnother comment notes of that paper:The Science paper says their reconstruction is smoothed and has low time resolution. They say it displays no variation at all on timescales <300 years, and attenuates even 1,000 year variations. Superimposing this with the 30-year Hadley data seems misleading, because it is on a very short timescale which is suppressed from the older data.