Ed Thurstan picked up on these odd ACORN errors in early 2013 – so thanks to Ed for his spreadsheet. He has found about a thousand of these daily errors in ACORN – approx 8 or 9 per station on average, some better than others. Here are the 3 days from Giles marked with pink X – and the days either side.
Just remember these nonsense data were created by the BoM much ballyhooed ACORN process, peer reviewed by the great and the good of climate science – and the BoM has had 15 months to correct their dubious creation.
I thought it might help to home in on 1997 which was the last year of ACORN adjustments – for some reason Giles BoM staffers achieved perfection on 1 Jan 1998 and except for a few days rejected by ACORN maintained accuracy to end 2013.
This chart shows Giles 013017 ACORN adjusted temperature minus daily minumums for 1997. Remember that there were no ACORN SAT adjustments to raw maximum readings.
On 301 days BoM professional observers read the minimum temperature too warm – on 6 days they got the reading exactly right and on 58 days they read the minimums too cool.
We must remember that the BoM staffs the Giles Meteorological Office – these are not amateur part time instrument readers. So these numerous and often large errors as recently as 1997 take a bit of getting in perspective.
This chart shows the ACORN minus raw numbers sorted and an interesting result emerges that the zero change bin is very small.
I am no statistician but would not these adjustments be expected to show a normal distribution? If so the 0 bin should be larger – similar to the bins either side.
Yesterday Labor leader ex-union boss Bill Shorten made a landmark speech yesterday addressing Labor’s declining fortunes at elections over decades. He said Labor had to reduce union influence on pre-selections – and increase Labor party membership.
As Miranda Devine observes, Labor’s real challenge isn’t severing ties with the unions. It’s severing ties with the Greens. Labor is addicted to Green preferences at elections and is too paralyzed to make the break.
The major parties should all put the Greens last – so simple.
Just a bunch of too-green-climate-change-saluting-doomsters – Wentworth Group followers – pushers for more expensive water – pushers for high environmental flows – did they ever speak out against anti-damism? – shut them down. We need public servants working to bring water to the people, agriculture and industry at the best cost. How radical is that?
Like resources – water is a State issue anyway – not Federal. The NWC is just another ill considered Howard Govt initiative that seemed like a good idea at the time. While they are at it – the Murray Darling Basin Authority should be pared back to the barest essentials or done away with – another useless water quango.
Nothing is sacred – no temperature data is immune from the warmist tampering by the Australian Bureau of Meteorology in their ACORN SAT highly warming fabricated dataset. The max has not been adjusted in ACORN
This site is an automatic weather station located on the grounds of a research farm, about 7 km southeast of Rutherglen and well outside the town area, on flat ground over grass (farm paddocks) but with low hills a few hundred metres to the north. A gravel road (carrying farm traffic only) is a few metres to the west of the site.
There have been no documented site moves during the site’s history. The automatic weather station began operations on 29 January 1998.
But the BoM soon make Rutherglen safe for “global warming”…
Just two presentations here ACORN max and min compared to Rutherglen Research and a few near neighbours. Corowa is listed as an airport but must have started as a post office or similar.
Rutherglen Research is plagued by gaps. There are no ACORN adjustments to the max after Dec 1949 – There is a large gap in ACORN from 31 Oct 1959 – 2 Jan 1965 – a gap well known in Australian T data.
Yet CDO monthly data has numbers for that large gap except for Apr 1963 and all 1964. Differences between Rutherglen Research raw and ACORN chart points after 1950 are probably due to me averaging daily ACORN dailies into years – plus the fact that 82039 has no shortage of gaps. For example ACORN dailies have no data for Oct-Nov-Dec 1957 and 1959 has no dailies for Nov and Dec.
Comparison of max T – ACORN adjustments have no major effect on trend –
My point here is there is no sign of minimums in the Rutherglen district as cold as the BoM fabricated ACORN 82039 1913-1950’s.
So how on earth can these huge ACORN adjustments be justified?
Primarily exposing faulty methodologies behind global temperature trend compilations