Michael Mann says climate models cannot explain the Medieval Warming Period – I say they can’t even explain the present

Ice core data shows CO2 levels changed less than 10 parts per million from 1600-1800 during the MWP. From the Hockey Schtick:  A new paper from Schurer et al (with Mann as co-author) finds that climate “models cannot explain the warm conditions around 1000 [years before the present, during the Medieval Warming Period] seen in some…

ENSO Myth 5 – ENSO Only Adds Noise to the Instrument Temperature Record…

…and We Can Determine its Effects through Linear Regression Analysis, Then Remove Those Effects, Leaving the Anthropogenic Global Warming Signal This is the 5th post in the series about myths and failed arguments about the El Niño-Southern Oscillation—myths that were created by proponents of the hypothesis of human-induced global warming. The intents of these myths…