reds indicate temperatures higher than the average during a baseline period of 1951-1980, while blues indicate lower temperatures than the baseline average.”
Ask yourself why they chose the period they did as a "baseline".
Ask yourself why they chose the period they did as a “baseline”.
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Too easy ,, up to the 1980’s scientists were convinced we were heading to a mini-ice-age ... I haven’t looked at the data (and won’t!) because it is inherently unreliable ,, too many problems normalizing the data with differing temperature measurement technology , changes in microclimates around weather stations and such... how do you compare data taken with a mercury thermometer in a hut surrounded by grass and trees to the same weather station with electronic data recording to the 4th decimal point that is now surrounded by asphalt parking and buildings disrupting the airflow and sunlight?