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39 Articles

The Yamal Implosion

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Mr. Steve McIntyre of Climate Audit has discovered that the Yamal tree ring series used a small subset of the available data. Tree ring data is used to estimate historical temperatures. The Yamal series, which is used in multiple studies, show a hockey stick shape with rapid warming in the 20th century. When all the relevant data is used the hockey stick disappears and the medieval era is warmer than the current period. Bishop Hill has prepared this layman's narrative.

Bias and Concealment in the IPCC Process: The 'Hockey Stick' Affair and its Implications

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A comprehensive history and discussion of the hockey stick affair. The "divergence" problem and the selective and unreliable nature of tree ring reconstructions are discussed, as is the unsatisfactory IPCC review process that ignored the invalidation of the "hockey stick".

Correlation Between CO2 and Global Temperatures Not There

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This ICECAP article with graphs shows there is no correlation between global temperatures and CO2 over the last decade.

The Destruction of the Hockey Stick

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This section describes the problems with the temperature history based on tree rings from Mann, Bradley and Hughes that was used by the IPCC in the third assessment report. The hockey stick shape of the temperature data was due to mathematical errors, inappropriate selection of data and other defects.

The Hockey Stick: A New Low in Climate Science

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John Daly reviews the hockey stick affair and the attempt by the IPCC to eliminate climate variability from Earth's history. He presents evidence that the Medieval Warm Period and the Little Ice Age were real and global in extent.

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