Introducing the global warming speedometer

Watts Up With That?

A single devastating graph shows official climate predictions were wild

By Christopher Monckton of Brenchley

The new global warming speedometer shows in a single telling graph just how badly the model-based predictions made by the Intergovernmental Panel on Climate Change have over-predicted global warming.

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The speedometer for the 15 years 4 months January 2001 to April 2016 shows the [1.1, 4.2] C°/century-equivalent interval of global warming rates (red/orange) that IPCC’s 1990, 1995 and 2001 reports predicted should be occurring by now, compared with real-world, observed warming (green) equivalent to less than 0.5 C°/century over the period.

Observed reality

RSS and UAH monthly near-global satellite lower-troposphere temperature anomaly values for each month from January 2001 to April 2016 were assumed to be broadly accurate and were averaged. The least-squares linear-regression trend on their mean was determined and found equivalent to 0.47 C°/century.

Predictions in IPCC’s Assessment Reports

IPCC (2007, 2013) are…

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