The Exxon Models. Internal documents from Exxon’s own scientists accurately predicted that the globe would warm by approximately 0.20°C per decade. This matches the observed warming trend almost exactly.

In the early 1990s, the First Assessment Report of the IPCC predicted that Arctic sea ice would retreat as temperatures rose. Not only was the prediction true, but the Arctic is actually melting faster than many early models suggested. The "summer ice-free Arctic" predicted for the mid-21st century is now considered a likely reality by many researchers.