Tag Archives: Jan Esper

Yet another paper demonstrates warmer temperatures 1000 years ago and even 2000 years ago.

Yesterday I highlighted the paper The extra-tropical Northern Hemisphere temperature in the last two millennia: reconstructions of low-frequency variability, by B Christiansen of the Danish Meteorological Institute and F C Ljungqvist of Stockholm University which showed that using a multitude … Continue reading

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Posted in Paleoclimatology | Tagged , , , , , | 182 Comments

This is what global cooling really looks like – new tree ring study shows 2000 years of cooling – previous studies underestimated temperatures of Roman and Medieval Warm Periods

Since Princeton’s Dr. Michael Oppenheimer conflated weather with climate last week, proclaiming a short lived heat wave as “This is what global warming really looks like” in a media interview, it seems only fair to show what real science rather than … Continue reading

Posted in Global cooling, Paleoclimatology | Tagged , , , , , , , , | 219 Comments

Climategate 2 email – Rob Wilson replicates McIntyre & McKitrick – produces hockey sticks out of noise

Reader Crosspatch writes in comments: 4241.txt is where Briffa Rob Wilson apparently believes he recreates what McIntyre is talking about the hockey stick showing up no matter what data you feed into it. Briffa Wilson creates randomly generated time series, … Continue reading

Posted in Climategate, Paleoclimatology | Tagged , , , , , , , , , | 65 Comments