During the 1970s, that same area was thick with ice.
Hansen says the 1970s were much warmer than the 1920s, so he seems to be implying that polar amplification used to be a large magnitude negative number – before it became a large positive number. Hansen is telling us that the Arctic cooled dramatically from 1920 – 1970, while the globe heated. Completely FOS.
Steven -
I hope your implying that they’ve cooked the books just to make sure everything fits with the so marvelous computer model.
Feel free to insert a ‘not’ where applicable.