The Global Warming Challenge

Evidence-based forecasting for climate change

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Archive for February, 2015

January 2015 warms Mr Gore’s prospects

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The global average average temperature anomaly ticked up a tad to reach 0.36°C in January, enough to get past half-way to the IPCC “dangerous warming” trend line that is standing in for Mr Gore’s bet. Mr Gore has now won 26 out of the 85 months of The Climate Bet so far; less than half of the 59 months that Professor Armstrong has won. We hope that Mr Gore wins a few more months to keep The Bet alive for the remaining nearly three years that are left to run.

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February 11th, 2015 at 12:17 pm

Why we don’t use IPCC temperatures for The Bet: An update

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In case you, and we, needed reminding, Christopher Booker describes the latest stories to break on the dubious adjustments and revisions that government agencies make to the sparse measured terrestrial temperature record in his The Telegraph article titled “The fiddling with temperature data is the biggest science scandal ever.”  The adjusted data are used to derive the global average temperature series used by the IPCC and others who promote warming alarmism.

Reading Booker’s article leaves the reader with the impression that the use of the term “fiddling” in the title amounts to a classic case of British understatement. The term “rewriting history” is perhaps closer to summarising the violence that is still being done to the official temperature records.

A picture is sometimes worth a thousand words. Steven Goddard’s changing temperature history charts on this page of his blog very effectively illustrate some of the adjustments that have been made to the official series. It is possible, one might suppose, that better data might become available decades or even centuries after the event, or that better methods for analysing data might be developed. But such developments would not explain why every round of adjustments to the older data has resulted in a stronger warming trend.

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February 9th, 2015 at 6:04 am