How Did Hansen Pull Off This Cheat?

We know a lot of the history of how Hansen and USHCN corrupted the US temperature record in the year 2000, but much less is understood how he wiped out the northern hemisphere warmth from 1900 to 1940. The graph below shows National Academy of Sciences northern hemisphere temperatures (black) published in 1975, overlaid with the current GISS northern hemisphere plot (red). Hansen generally wiped 0-2-0.3 degrees off all pre-1940 temperatures.

Does anyone have any information how and when this was done?

Prior to both cheats, the northern hemisphere graph (black below) looked very similar to the US temperature graph (red below).

The cheat occurred in two stages. First Hansen corrupted the northern hemisphere data to make it appear different from the US data. Then he used that difference as an excuse to corrupt the US data.

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9 Responses to How Did Hansen Pull Off This Cheat?

  1. scizzorbill says:

    Ask Steve McIntyre @ Climate Audit.

  2. gator69 says:

    Turtles, all the way down…

  3. DirkH says:

    One should create a new branch of science, a bastard child of forensics and statistics – cheatology, which would exclusively occupy itself with analyzing how the other sciences cheat, who the cheaters are, why they do it and so on.

    • A guide to cheating here:

      I suspect the problem is that prestige and career advancement is dependent on the number of papers one publishes. But science is very difficult and it’s not getting easier. Much of the “low hanging fruit” has been picked in many fields, so to speak. Not that the low hanging fruit was all that easy to pick anyway. So researcher ‘A’ has 50 papers to his credit. Did he really make 50 scientific breakthroughs?

  4. GregD says:

    How can the public bring charges against this guy, surely there is some kind of fraud charge that can be brought against him.

  5. Andy DC says:

    He who controls (adjusts) the data controls the world. Especially with the LSM on board.

  6. suyts says:

    Speaking of cheats, …… the Guardian’s Suzanne Goldenberg reported that Gleick had been cleared of forgery. I tweeted her asking about her sources….. story is gone now. Goldenberg had done some questionable reporting in Israel.

    • edwardt says:

      Must shift ocean peak to become solar peak…there is no oceanic influence. They are smart bastards…

  7. kramer says:

    And the “vast majority of climate scientists” who agree that global warming is occurring are looking at this adjusted data…. Do they even realize the amount of data massaging that has occurred?

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