A reader has been saving GISS temperature data every month since 2005, and sent it over to me.
In 2005, Hansen showed about 0.55C warming from 1910 to 2005. Now he shows almost 0.75C warming over that same time interval.
The next graph shows alterations to the data since 2005 – almost 0.2C.
Hansen is trying to create the impression of warming by progressively cooling the past, and progressively warming the present. The graph below shows how he used to adjust June 1915 upwards by 0.07C, but now he adjusts it downwards by 0.19C. Since 2005, he has progressively altered the June 1915 temperature by more than 0.25 degrees.
The next graph shows how Hansen has progressively warmed October 2002 in successive versions of the GISS data. In 2005 he showed the anomaly at 0.46C, and now he shows it at 0.6C. There have been five upwards data tampering events since 2005.
It seems safe to assume that there was additional data tampering going on prior to 2005, but we can see that about 30% of current warming is due to post 2005 data tampering by NASA’s James Hansen.