Guest essay by Eric Worrall
NASA researcher Mark Richardson has completed a study which compares historical observations with climate model output, and has concluded that historical observations have to be adjusted, to reconcile them with the climate models.
The JPL Press Release;
A new NASA-led study finds that almost one-fifth of the global warming that has occurred in the past 150 years has been missed by historical records due to quirks in how global temperatures were recorded. The study explains why projections of future climate based solely on historical records estimate lower rates of warming than predictions from climate models.
The study applied the quirks in the historical records to climate model output and then performed the same calculations on both the models and the observations to make the first true apples-to-apples comparison of warming rates. With this modification, the models and observations largely agree on expected near-term global warming…
View original post 719 more words