In 1981, Hansen reported high temperatures at the Northern Latitudes (23.6N – 90N) around 1940, followed by a strong cooling. But that didn’t support the theory, so NASA’s finest simply made the 1940’s blip disappear through repeated data tampering.
1981 version : 1981_Hansen_etal_1.pdf
1999 version : 1999_Hansen_etal_1.pdf
Current version : Fig.B.gif (407×678)
They climategate team didn’t like the 1940’s blip, so they disappeared it.
From: Tom Wigley <firstname.lastname@example.org>
To: Phil Jones <email@example.com>
Date: Sun, 27 Sep 2009 23:25:38 -0600
Cc: Ben Santer <firstname.lastname@example.org>
It would be good to remove at least part of the 1940s blip, but we are still left with “why the blip”.