The Hockey Stick and the Climate Wars

Elegant interview @MichaelEMann @livingonearth: The Hockey Stick and the Climate Wars

MANN: Well, we only have about a century of widespread thermometer measurements in the world. So we know the world has warmed by a little more than a degree Fahrenheit, but we don’t know how unusual that sort of warming might be in a longer term context without turning to other sources of information, so-called proxy records like tree rings, ice cores, corals, and so what my co-authors and I did in the 1990s was to take all the information available in these natural archives and use them to reconstruct the climate back into the more distant past, and what we found was the more recent warming was unprecented as far back as we could go, which was 1,000 years at the time, and the shape of the curve, which shows a long-term cooling trend from the medival era into the depths of the Little Ice Age, followed by a anomalous spike of the past two centuries, sort of resembles a well...

Full article: http://www.loe.org/shows/segments.html?programID=13-P13-0...