All that “impossible to believe”, high-tech IPCC modelling just happens to fit simplistic extrapolations of common accelerating functions pretty much spot on, depending on your choice of greenhouse gas concentration pathway (“RCP“).
Details are on the main graph pages (click for links):
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- Global monthly instrumental temperatures since 1850
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- Global monthly instrumental temperatures since 1970
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- Instrumental, satellite and reanalysis temperatures since 1850
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- Instrumental, satellite and reanalysis temperatures since 1970
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- Geological temperature history
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