Denier predictions vs IPCC projections

This animation compares the observed global temperature change since 1990 (black curve) to projections of global temperature change from the first four Intergovernmental Panel on Climate Change (IPCC) reports (red, pink, orange, green) and from various "climate contrarians" (blue, purple, green, gray dashed).  The observations are given by the average of 3 primary global temperature datasets (NASA GISS, NOAA NCDC, and HadCRUT4).  All of the IPCC projections have proven to be quite accurate, suggesting high reliability.  The contrarian projections all underestimate the global warming substantially, and in fact they erroneously predict global cooling and are quite unreliable.  Details of the projections are described here, and additional comparisons can be found in the Lessons from Past Predictions series.

SkS Resources that use this Graphic

• Contrary to Contrarian Claims, IPCC Temperature Projections Have Been Exceptionally Accurate
• 2012 in Review - a Major Year for Climate Change
• NASA Retirees Appeal to their Own Lack of Climate Authority
• IPCC Overestimate Temperature Rise
• Watts Interview – Denial and Reality Mix like Oil and Water
• Roy Spencer's Catholic Online Climate Myths

Images

• High resolution JPEG (1024 pixels wide)

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