Global Temperatures Global Troposphere Temperatures click here For full size []]
Providing Insight
Into Climate Change
Temperature History
Technical Rating
star Easy
starstar Harder
starstarstar Most Difficult
39 Articles

The Yamal Implosion

Technical Rating: star star
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

Technical Rating: star star
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

Technical Rating: star
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

Technical Rating: star star star
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

Technical Rating: star
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.




web design & development by: