The Global Warming Challenge

Evidence-based forecasting for climate change

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July 2017: Another unremarkable month for the global average temperature

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The  global mean temperature anomaly for the month of July 2017, as estimated by the UAH  climate scientists, was 0.29°C. If it weren’t for the cries of alarm about what Mr Gore and others speculate might happen, there would be little interest in this obscure and unremarkable measurement.

Mr Gore and the IPCC did raise the alarm, however, so here on theclimatebet.com site we will continue to monitor the performance of Mr Gore and the IPCC’s 3°C per century of warming projection relative to Professor Armstrong’s bet on scientific forecasting forecasting and the Green, Armstrong, and Soon (2009) no-change model. With only 5 months of the ten-year notional bet left to run, the cumulative absolute error of the Gore/IPCC projection is 21% larger than the error of the scientific forecast.