Four (More) Cases Where Climate Scientists Have ‘Warmed’ The Earth

earth heating cooked fire disaster

The history of climate scientists adjusting data to try to make recent warming look greater than it really is goes back quite a long way – it’s a regular topic at Paul Homewood’s blog for example.

But climate scientists continue to do it, giving the skeptics plenty of ammunition.

Here are three recent blog posts discussing how climate scientists continue to adjust data to exaggerate warming.

At Pierre Gosselin’s blog, there’s a guest post by Kirje from Japan, on NASA GISS temperature adjustments. In the latest GISS version, V4, the supposedly “unadjusted” data sets are different from the unadjusted data in the previous version V3.

Tony Heller has a graph of the 2000, 2017, and 2019 versions of NASA GISTEMP, showing that Gavin Schmidt and his team have managed to crank up warming, particularly in the era of the inconvenient pause. You can also see this effect in fig 2 and fig 4 of the GISS history page.

Here in the UK, the HadCRUT4 team is doing the same thing. Clive Best asks: Whatever happened to the Global Warming Hiatus?

The answer is that they have demolished it with a sequence of adjustments to the data. HadCRUT3, as published in 2014, shows a clear pause, with no warming from about 2001-2013, but the latest new improved data set HadCRUT4.6 cranks recent temperatures upwards.

Clive thought that might be due to including different measurement stations, but checked and found that was not the case. The numbers have simply been adjusted.

The previous versions of HadCRUT4 are available here. From there you can see how the temperature difference between 2013 and 2001 has been steadily nudged upwards in successive versions:

HadCRUT version 2013 – 2001 temperature
4.1.1 0.023
4.2.0 0.050
4.3.0 0.053
4.4.0 0.059
4.5.0 0.073

But the main point of this post (the 4th ‘again’ in the title) is to report on the very latest data fiddle, not mentioned in any of the above posts.

This comes from John Kennedy and colleagues from the Met Office and is described in a very long paper recently made available here.

This is concerned with sea surface temperatures (SSTs) and the brand new data set is called HadSST4 (confusingly, HadCRUT4 uses HadSST3).

Here is Fig 14 from the paper. The axis label is on a lower plot, but the big tick marks are 1850, 1900, 1950, 2000.

The graph compares the current version HadSST3 with the proposed new one, HadSST4.

Obviously, I don’t need to explain which is the new version and which is the previous one. Warming has simply been tweaked upwards by about 0.1C, or about 10% of the total.

Figure 16 shows temperature trends from the year marked up until 2012:

Here the red diamond is the raw data, the green diamond is HadSST3, and the new HadSST4 is shown as the black line, with grey shading representing uncertainty.

In the early years of the 20th century, there was global warming that doesn’t fit with the carbon-dioxide-controlled theory of climate scientists, so that is adjusted downwards.

But look at the trend over the pause era since 2000.

The raw data shows literally no trend at all. HadSST3 adjusted the trend upwards to create warming, and HadSST4 adjusts things upwards again, roughly doubling the previous adjustment.

And this is in an era when the data quality should be excellent, thanks to the introduction of the ARGO float system.

So what is going on here? There’s a clue in the other two symbols, the blue and orange. These are two other efforts to measure sea surface temperature, ERSST, and COBE-SST.

Since these have created a warming trend significantly greater than HadSST3, the Met Office had to adjust their temperatures upwards as well, to keep up.

This “reduced discrepancy between datasets” is one of the key points highlighted on the first page of the paper.

Throughout, the paper talks of biases in the data and how they are removed. But the authors seem to be oblivious to the biggest source of bias, that taking place in their own heads.

Read more at CliScep

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Comments (2)

  • Avatar

    david molloy

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    The fat cats at the UN need to keep this falsify alive or these fat positions will be redunit.Keep up the corrections with social media as a lifeline it will be difficult to fool the masses .drc

    Reply

  • Avatar

    Finn McCool

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    A 2 dimensional graph of the Global Mean temperature is about as much use as an ashtray on a motor bike. It says nothing about nothing. I don’t even know what a Global Mean means, if you excuse the pun.
    Wouldn’t it be nice to see some sort of animated 3 dimensional grid of temperature oscillations for say, a 100 mile radius from your own location over the last 20,00 years or so?
    Of course we can’t. There was no one around to measure them to 0.01 degrees C like our wonderful modern satellites.
    “This last glacial period, known in Britain as the Late Devensian glaciation, began about 33,000 years ago. At its peak, about 22,000 years ago, a large ice sheet covered all of Scotland and went as far south as England’s Midlands area.” from : https://www.nature.scot/landforms-and-geology/scotlands-rocks-landforms-and-soils/landforms/ice-age-landforms/ice-age
    Apparently, it warmed ‘rapidly’ until freezing over again 15,000 years ago. Lo and behold, it now seems much warmer! At least from where I’m sitting now.
    The same source wisely tells me that: “Ice sheets covered all of Scotland except the very highest peaks during the more intense glacials. These may have occurred five or six times in the last 750,000 years.”
    Ben Nevis, at 1,345 metres, is the highest peak in the Scotland. So. In an intense glacial period, I would be sitting under a kilometre of ice. Give or take a peak or so. Depending on which of the 5 or maybe 6 glacial periods they can’t narrow it down to.
    If any one shows me a meaningless 2d excel graph of ‘mean global’ temperatures to prove that CO2 has melted and, by it’s absence, again froze a kilometre of ice in Ayrshire…good luck to them!
    A few hundred years in geological time isn’t even worth talking about and neither is 750,00 years.

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