You can throw this article right in the trash can.....the emminent scientist Michael Mann is quote, thus making anything in the article suspect. he is the creator of the famous 'hockey stick' graph used by the IPCC in their 2001 report to show man made global warming. When asked to show the formulas he used, he refused. Since then, the graph was shown to be such a piece of sh!t that the IPCC does not even mention it in their current 2007 report about the imminent threat of global warming...........
Michael Mann is a well-known climatologist, author of more than 80 peer-reviewed ... Mother Jones, 18 April 2005, "The Man Behind the Hockey Stick" - interview ...
need I say more? I am surprised any reputable publication would even look this phony up for a quote. He could be considered one of Pope Al 'global' Gore's primary cardinals.
correction, was the 1995 report by the IPCC that had the hocley stick.Dr Michael Mann of the Department of Geosciences, University of Massachusetts was the primary author of the GRL paper, and in one scientific coup overturned the whole of climate history [16].
Using tree rings as a basis for assessing past temperature changes back to the year 1,000 AD, supplemented by other proxies from more recent centuries, Mann completely redrew the history, turning the Medieval Warm Period and Little Ice Age into non-events, consigned to a kind of Orwellian `memory hole' [22]. Fig.4 shows Mann's revision of the climatic history of the last millennium.