No, Exxon was wrong on warming and didn’t know anything

Spread the love


By Steve Milloy

More fake news from the climate-industrial complex.

You can read the NYTimes coverage here. The Science article is here and the supplementary material is here. Below is what you need to know.

No Evidence that Exxon ‘Knew’ Anything

A new Harvard study claims that its analysis of ExxonMobil internal analyses of emissions and global warming done between 1977 and 2003 shows that ExxonMobil scientists correctly predicted emissions-driven global warming was occurring at a rate of about 0.2°C per decade and that this shows that “Exxon knew” emissions-driven global warming was real and a threat.

Assuming for the sake of argument that the Harvard claim is true:

Current models produce about twice as much emissions-driven warming as ExxonMobil allegedly did (0.44°C vs. 0.2°C/decade).

Current NASA satellite data shows global warming (regardless of cause) is only at about 0.13°C, only about half of what ExxonMobil supposedly predicted for emissions alone.

  • Like the ExxonMobil forecast, all climate models have significantly overpredicted warming.
  • There has been no global warming (regardless of cause) for the past 8+ years, despite 14% of total manmade emissions.

If you remove from the warming trend of the last 30 years the non-CO2 related temperature drivers (1991 Mt. Pinatubo eruption and the El Ninos occurring from 1998 to present), there has been no discernible emissions-driven warming since climate hysteria began, despite 50% of total manmade emissions.

It’s hard to make the claim that “Exxon knew” when there is no evidence that ExxonMobil knew or knows anything correct about temperature trends or their causes.