Sentences with phrase «historical temperature reconstructions»

Over the last several years, there has been quite a bit of debate in climate circles over historical temperature reconstructions from various «proxies» like ice cores and tree ring widths.

The ISPM overview states: «Natural climatic variability is now believed to be substantially larger than previously estimated, as is the uncertainty associated with historical temperature reconstructions.»

For years, Hansen's group at GISS, as well as other leading climate scientists such as Mann and Briffa (creators of historical temperature reconstructions) have flaunted the rules of science by holding the details of their methodologies and algorithm's secret, making full scrutiny impossible.

For example, Michael Mann used his own historical temperature reconstructions as the lead analysis in the section of the third IPCC report for which he was lead author.

There is no specific justification for the claim that «uncertainty associated with historical temperature reconstructions» is larger in TAR than in AR4, as no specific citation is given in the ISPM.

The quote comes from a question (at the 53:40 mark on the video), in which Dr. Mann is asked about Dr. Richard Muller of UC - Berkeley, a former skeptic who recently completed a study that ended up confirming the accuracy of the historical temperature reconstructions done by climate scientists.

It is hard to know which is greater: contrarians» overstatement of the flaws in the historical temperature reconstruction from 1998 by Michael E. Mann and his colleagues or the ultimate insignificance of their argument to the case for climate change.