Quote:


https://www.2gb.com/outback-australian-town-robbed-of-100yo-world-record-due-to-...

I have heard of this happening in America too

"While head of the Environment Unit at the Institute of Public Affairs, Marohasy compiled a backgrounder titled Myth and the Murray - measuring the real state of the river environment which was published by the Institute in December 2003. The Institute received a $40,000 donation from Murray Irrigation Limited at that time".

It makes the word choice of "robbed" to be suspect. BOM explains its basis for calibration during a century of physical change in equipment and so on. It gives reviews by world meteorologists.

A lot of our work is temperature or CO2 or O2 or Speed or Weight calibration.

It is hard to get a correct stable reading.
You have to write down what is on the meter.
You cannot change data. Data is what is on the meter.
You can make a note concerning various conditions.

If the meter says 35.5 and it should be 37, I write down 35.5 and make a note saying "XYZ may be reading low due to .............'
Then the next day I come back and retest it.

But changing the original data is falsifying data.
That is naughty.

chimera wrote on Mar 6^th, 2020 at 11:55pm:



Yes petal. So perhaps you can tell us why BoM changes values for statistical reasons. Barney can't.

Now to understand statistics you need to know that statistics is all about probability. So statistically they can say this is our best estimate of the temperature at Marble Bar. And it will be between a range of temperatures. But they can't say definitively this was the temperature at Marble Bar on such and such a date.

"The Bureau claimed these changes were necessary because the weather station at Marble Bar has been moved, the moves created discontinuities in the temperature series, and these discontinuities can only be ‘corrected’ with reference to neighbouring sites.

In fact, the weather station at Marble Bar has always been just to the southeast of the town centre, on vacant public land on the edge of the Great Sandy Desert, which covers an area of about 284,993 km². There is no documentation for any move in 1944. In 1967 the weather station was apparently moved some metres. The distance is recorded as ‘small’ in the relevant catalogue.

The Bureau nevertheless identified weather stations at Mundiwindi (about 300 kms south), Wiluna (about 700 km south) and Roebourne (about 300 km east) as neighbouring stations suitable for comparison, specifically for fixing the perceived ‘discontinuity’ in 1944 created by the apparent station move. "

https://jennifermarohasy.com/2020/03/warming-marble-bar/

So they used stations between 300 and 700km away to statistically adjust the temperature.  Too bad if any of those sites had something like a thunderstorm to influence temperatures.





https://www.waclimate.net/round/rounded-marble-bar.html

Sprintcyclist wrote on Mar 7^th, 2020 at 1:06pm:


The older ones are marked down, relatively few of the newer ones.

"Conversely, the effects of global warming are
evaluated by the Australian Bureau of
Meteorology (BOM) with a continuously evolving
procedure based on a constantly evolving data
set, where arbitrary changes of the temperatures
collected in the past is the norm rather than the
exception. This practice of arbitrarily cooling
down the past to magnify the warming has been
the subject of our past works [1-4]."

"Adjustments that cool historic temperatures have
almost doubled Australia’s rate of warming that is
otherwise mostly the artificial warming due to the
establishment of urban heat island (UHI) about
the thermometer locations. Two additional data
sets have been recently brought to the attention
of the scientific community by Gillham [5] to
support the claim that the Australian global
warming is man-made but only through
corrections by the local Bureau of Meteorology
(BOM)."

https://researchonline.jcu.edu.au/38584/1/38584%20Parker%202015.pdf

Sprintcyclist wrote on Mar 5^th, 2020 at 1:29pm:




You're relying on some IPA fellow telling Alan JOnes as evidence.


The bar is getting lower and lower.

lee wrote on Mar 19^th, 2020 at 12:23pm:




I'm addressing the OP. Your one piece vs the bulk can wait.