More On The Boulder NOAA Temperature Fraud

NOAA has done some spectacular data tampering with the Boulder, Colorado temperature record, knocking as much as 7.8 degrees off the older measured temperatures, to turn a cooling trend into a warming trend.


A good example of this was May, 1980 – from which NOAA has knocked 7.3F off the measured minimum temperatures. The adjusted mean temperature is very close to the coldest daily temperature that month, and colder than every day but six.


The adjustments are clearly bogus and without any scientific basis, but this is standard practice at the US Government.

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6 Responses to More On The Boulder NOAA Temperature Fraud

  1. Douglas Hoyt says:

    A good way to check this is to look for the days of first and last reported frosts. It will probably confirm that the un-adjusted temperatures are correct, because the adjusted temperatures will predict frosts much later in the spring and much earlier in the fall.

  2. Patrick Hannon, Ph.D. says:

    Hey Tony, I’m a statistician working in the pharmaceutical industry, long time fan of your website. I’ve been looking into the very beginning steps in how NASA and NOAA handle the basic raw temperature record, and was stunned to see the blind application of using “temperature anomalies” as the fundametal raw data starting point, divorced from their means. Yes I understand that using absolute temperatures with sites coming and going in time has it’s problems, but to say that using the departure from the mean cures any manor of problems is absurd. You’ve done two things horrific with this naive step. 1) reduced the statisticial information in your “raw” data, 2) no doubt have introduced systematic distortions in time depending on the pattern of when and where sites became active, or inactive. If fact on my first attempt of creating a simple demonstration of this effect (just three temperature sites with one starting up late, with the bad timing that it started while temperatures were heading down say in the 1960’s and 1970’s, the effect was that it cooled the past). Interesting I would say. You can’t remove this distortion with whatever further data processing you might think of to do. It’s inherent now in the “raw” data because of the drastic step you’ve taken blindly by replacing the actual temperatures with departure from mean. Anyway, if interested, give me an email ring.

  3. HenryP says:

    Better look at the rate of change rather than anomalies

  4. Lance says:

    With a few more years of adjustments, the LIA will have actually ended in 1980, so we can have almost a vertical graph of temperatures to present to prove your vehicle was the problem!!

  5. Andy DC says:

    May 1980 was the Mt. St. Helen’s eruption. Could that have come into play? Perhaps the ash cloud might have affected Boulder’s temperatures? But one way or another, this appears to be massively “adjusted” data.

    • rw says:

      This may be a new record! I’ve been keeping a kind of personal account of this – the previous ‘record’ was 4 degrees for the entire state of Maine in 1913 (reported on NoTricksZone). At this point, I have no idea how far these birds will go – never in my wildest dreams did I think they would dare make an adjustment of 7 degrees.

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