It is furter notable that if you look carefully at that chart you see the bottom swings of each cycle actually became more active than they had been around the 1950 peak, so observations would be skewed as well because the (low) cooling years which countered the unpredented high would not have been as much as had been seen before.
It is furter notable that if you look carefully at that chart you see the bottom swings of each cycle actually became more active than they had been around the 1950 peak, so observations would be skewed as well because the (low) cooling years which countered the unpredented high would not have been as much as had been seen before.