Hansen And Mann, Hiding The Other Decline

As of 1999. GISS showed no net warming from the 1870s through the 1970s, and that 1877 was the warmest year during that century.

ScreenHunter_6188 Jan. 18 20.38

ScreenHunter_6189 Jan. 18 21.07 Surface Air Temperature Analyses 

That was right around the time when Mikey was building his hockey stick.



But the GISS data didn’t look much like a hockey stick, so Hansen simply got rid of all the warm pre-1880 years, and cooled all the remaining pre-1960 years. The image below shows what the original hockey stick would have looked like had Hansen not hacked the GISS database.

ScreenHunter_6190 Jan. 18 21.12

This is of course on top of all of his pre-1999 hacking, to cool the past from his 1981 version.


Scientists say they are 99% certain, based on this meaningless tortured data which wouldn’t withstand the slightest scrutiny by any serious engineering group in the country. And this doesn’t even address the other issue of Mikey throwing out the post-1960 tree ring data.


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21 Responses to Hansen And Mann, Hiding The Other Decline

  1. Gail Combs says:

    Plants tell us that Hansen and Mann are incorrect. The 1990s were cooler that at least two other decades in the 20th Century in the US Midwest.

    • darrylb says:

      Gail, thanks for the graphs above.
      An acquaintance was arguing that there has been warming based upon the fact that in Southern MN we have shifted one zone for plants. This info seems to contradict that shift.

    • Jason Calley says:

      Here in north-eastern Florida the climate has definitely shifted in the last 120 years or so. This area was once covered with successful citrus groves and still has cities with names like “Orange Park” or “Mandarin” or “Grove Park”. We get too many hard freezes to allow citrus crops here now. Yes, you might have a few plants that grow OK in small micro-climates — but commercial groves? No way. You need to go another 80 or 100 miles south for citrus operations today.

  2. emsnews says:

    England, which was told that children by today would not know what snow looks like, is now being hammered by super cold/snow/ice, and hundreds are predicted to die there this next several days.

  3. Gail Combs says:

    Frank Lansner did quite a bit of work looking at different subsets of temperature data.

    How geography determines temperature trends.

    For all areas analysed (almost 20 countries by now) we see a large group of stations with warm temperatures trends after 1930 (“OAA” stations) but also a large group of stations with very little or no warm trend after around 1930 (“OAS” stations).
    The classification of OAA versus OAS simply depends on geographical surroundings. Coastal areas (follow ocean temperatures) and Noncoastal areas
    Non-coastal stations can be divided further into Ocean Air Affected stations (“OAA”, marked yellow) and then Ocean Air Shelter stations (“OAS”, marked blue).

    In the following graph
    Coastal areas = Red

    Non-Coastal stations
    OAA = Ocean Air Affected Stations (black)
    OAS =Ocean Air Shelter stations (blue)



  4. Gail Combs says:

    If you were actually looking for the ‘True Temperature’ of the earth I would think you would want to use the sites Frank called “Ocean Air Shelter stations” since they would not be effected by the ~60 year ocean oscillations and therefore would give a better picture of the overall temperature trend.

  5. omanuel says:

    I suspect that this disclosure will be met with a deafening SILENCE !

    • Gail Combs says:

      OH, look a squirrel!

      (freezing his rump off)

      • rah says:

        Driving to work today I fox squirrel ran across the road in front of me. Took me a second to figure out what he had in his mouth. That little squirrel had about a hale an ear of field corn he had picked up from the harvested field on one side of the road and was taking it to the pasture with some trees on the other side of the road. I watched jump right through the farm fence bordering the pasture without missing a beat. I used to hunt squirrels and have always enjoyed their aerobatic antics but that was a first.

  6. Jeo says:

    Should the first chart be labeled the 1981 version?

  7. Robert B says:

    Only the weather but it makes you wonder. The weather in Aus was hot last January when the US had global-warming induced polar vortex cause record cold weather, but nothing like in 1878.

  8. Eric Simpson says:

    Quote of the Week: “The last 15 years, there has been no recorded warming. Contrary to all the theories that—that they are expounding, there should have been warming over the last 15 years. It hasn’t happened.” Senator Ted Cruz, just named chairman of the Subcommittee on Space, Science, and Competitiveness.

  9. Helly says:

    Help please. We’re trying to figure out the twin “1999 version” chart labels.

    • Gail Combs says:

      See my comment above HERE.

      The are exactly the same chart except the first one goes to ~ year 1975 while the second goes to year 1999.

    • Gail Combs says:

      The other issue raise by Zeke was TOBS = Time of Observation.

      I address that issue HERE and another sleight-of-hand HERE Steve addresses TOBS in another manner HERE.

  10. Gail Combs says:

    I should add this information here since it helps explain the bogus rise in temperature.

    Zeke Hausfeather of BEST states @ Judith Curry’s site

    ……Nearly every single station in the network has been moved at least once over the last century, with many having 3 or more distinct moves. Most of the stations have changed from using liquid in glass thermometers (LiG) in Stevenson screens to electronic Minimum Maximum Temperature Systems (MMTS) or Automated Surface Observing Systems (ASOS). Observation times have shifted from afternoon to morning at most stations since 1960, as part of an effort by the National Weather Service to improve precipitation measurements.

    All of these changes introduce (non-random) systemic biases into the network. For example, MMTS sensors tend to read maximum daily temperatures about 0.5 C colder than LiG thermometers at the same location. There is a very obvious cooling bias in the record associated with the conversion of most co-op stations from LiG to MMTS in the 1980s, and even folks deeply skeptical of the temperature network like Anthony Watts and his coauthors add an explicit correction for this in their paper…..

    First one of the moves was closer to the buildings when they installed the electronic temperature Systems. Less digging and less wire.

    Second the conversion from liquid in glass thermometers to electronic devices is the conversion from a slow responding instrument (due to the amount of mass) to a very quick responding system.

    Anyone who has worked in a lab using temperature recording devices would immediately go SAY WHAT!! The electronic temperature system are so much faster in response they are going to catch peaks the glass thermometers would never see.

    German meteorologist Klaus Hager did the actual study of looking at glass thermometers vs the electronic temperature system

    The last couple of days I posted on an 8.5 year side-by-side test conducted by German veteran meteorologist Klaus Hager, see here and here. The test compared traditional glass mercury thermometer measurement stations to the new electronic measurement system, whose implementation began at Germany’s approximately 2000 surface stations in 1985 and concluded around 2000.

    Hager’s test results showed that on average the new electronic measurement system produced warmer temperature readings: a whopping mean of 0.93°C warmer. The question is: Is this detectable in Germany’s temperature dataset? Do we see a temperature jump during the time the new “warmer” system was put into operation (1985 – 2000)? The answer is: absolutely!


    BACKGROUND supporting meteorologist Klaus Hager

    Thermocouple technology makes these digital thermometers the fastest on the market, showing temperature readings in about 2 seconds, with high accuracy and a high temperature range.

    Comparision of Thermistors, Thermocouples and RTD’s


    Due to the nature of the basic process the number of conducting electrons increases exponentially with temperature; the characteristic therefore exhibits a strongly rising form. This pronounced non-linearity is a disadvantage of NTC resistors and limits their useful temperature span to about 100°C. They can of course be linearised by an automation computer. However, accuracy and linearity generally do not meet the requirements over larger measurement spans. Their drift under alternating temperatures is also larger than for RTD’s. Their field of use is limited to monitoring and indicating applications where the temperatures do not exceed 200°C. In such simple applications they are actually preferable to more expensive thermocouples and RTD’s in view of their low cost and the comparatively simple electronic circuitry required. In addition they can be produced in very small designs with a fast response and low thermal mass.

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