Update: New peer-reviewed study concludes 20th century warming was ‘within the range of natural variability over the last 12 centuries’
Updated to include full key quote: Study in Journal Climate of the Past: concludes 'Though we find the amplitude and spatial extent of the 20th century warming is within the range of natural variability over the last 12 centuries, we also find that the rate of warming from the 19th to the 20th century is unprecedented' -- 'Only two of the 8 types of temperature proxies analyzed indicate 20th century warming exceeded that of Medieval Warming Period'