[0] (data warning, large image file) has a pretty good demonstration of the scale we are looking at here. We may not have accurate weather data into the past, b

[0] (data warning, large image file) has a pretty good demonstration of the scale we are looking at here. We may not have accurate weather data into the past, but we do have good climate data into the past. A figure part way through goes lightly into the kinda of deviations to the data would be realistic. If you need harder evidence than a comic you will need to dig up some papers. [0] https://xkcd.com/1732/ https://xkcd.com/1732/