THE Australian Bureau of Meteorology keeps remodelling the temperature record for Australia – and not just by a little bit. Temperatures are changed through a process known as homogenisation, and then changed again, sometimes by as much as 6.4 degrees Celsius for the one day.
The temperatures as actually measured at Albany, and other places, has been changed by the Bureau in the development of the official temperature record for Australia.
For example, on 8th February 1933 the maximum temperature as measured at Albany in Western Australia was 44.8 degrees Celsius. Then, six years ago it was changed to 51.2 degrees Celsius! Recently it was changed again, this time to 49.5.
Changing the temperature record like this is not unusual for institutions such as the Australian Bureau of Meteorology, though the extent of the change for Albany on this day in 1933, and also the direction of the change, is unusual.
Usually past temperatures are cooled relative to the present as part of remodelling, which is called ‘homogenisation’. Cooling the past relative to the present has the effect of exaggerating global warming.
Given the magnitude and direction of this change to the Albany temperatures, which was first made six years ago, several of us asked the Bureau: ‘Why’?
Why was the temperature at Albany on this day (February 8, 1933) adjusted-up by so much (6.4 degrees) in the official version 1 of the ACORN-SAT dataset that was published six years ago?
I never got an answer.
I have simply been told, mostly via the mainstream media, that homogenisation is world’s best practice, and that ACORN-SAT is scientific.
Of course, it is not scientific to make such changes to temperature measurements, though this type of change – this remodelling – is standard practice not only for our Bureau but also for the custodians of the global temperature datasets relied upon by the IPCC (United Nation's Intergovernmental Panel on Climate Change).
While ACORN-SAT Version 1 contains remodelled temperature values that can vary from the actual recorded measurement by more than 6 degrees, the values in this same database are often referred to as ‘observations’ as though they represent real measurements. For example, when leading climate scientist Sophie Lewis and David Karoly published a paper in the American Meteorological Society journal about ‘extreme events’ they erroneous refer to ACORN-SAT Version 1 values as ‘observations’.
Indeed, ACORN-SAT Version 1 has underpinned almost all the climate change work at our universities and at CSIRO over the last 6 years.
Most climate scientists seem to want to believe that the temperature values that they are working with represent real measurements. But they don’t!
Just recently this ACORN-SAT database – used by Lewis, Karoly and thousands of other scientists here in Australia and also overseas – was updated. Dr Blair Trewin at the Bureau has re-adjusted temperature values yet again, creating ACORN-SAT Version 2.
In the case of Albany, the maximum temperature on 8th February 1933 is now shown as 49.5 degrees Celsius. In reality it the maximum temperature in Albany on that day back in 1933 was 44.8 degrees Celsius.
The integrity of the historical temperature record is of extraordinary importance. This record also underpins belief in catastrophic human-caused global warming.
Perhaps today’s front-page story in The Australian newspaper by Graham Lloyd will generate some interest in how and why our climate history can be so change, apparently at the whim of the Bureau and other such institutions around the world.
I wait, and I hope.
Wait. What?
Now, Stephen Briggs from the European Space Agency's Directorate of Earth Observation says that surface air temperature data is the worst indicator of global climate that can be used, describing it as "lousy".
Scientists are now trying to simulate the behaviour using computer models.
This is difficult because the behaviour of the deep ocean is too poorly known to be reliably included.
"The models don't have the skill we thought they had.
That's the problem," said Peter Jan van Leeuwen, director of the National Centre of Earth Observation at the University of Reading.
https://www.theguardian.com/science/2014/jun/13/pause-global-warming-data-sea-level-rises
Very good work. The public beliefs driven by one sided A.B.C corporate ideology accepts records without question.
For example, sea temperature readings are accepted to be historically higher therefore bleaching coral. There is never mention of higher sea temperatures at the cooler southern end of the Great Barrier Reef increasing so as to provide conditions favourable to coral growth.
It is not scientific but it sure is illuminating. If you go, and I sure you have, to the Trove website you will find some of the most descriptive newspaper articles on heat waves in the 19th & 20 century - especially around parts of western NSW. In fact, it was so bad the government of the day gave free rail passes to those who wanted to travel to cooler areas of the state. (https://trove.nla.gov.au)
Need a good dead fish story - stacks of those for all years in the Darling Basin in particular. How odd that events such as this are highly repetitive.