As reader Ian George has pointed out the BoM in their monthly report for New South Wales say – New South Wales in October 2014: Warmest October on record
Following Ian’s lead I have averaged all the District mean monthly max’s and added them to this map of BoM rain districts – I have shaded orange districts that topped a 4 degree anomaly.
This next map shows the NSW maximum anomaly for October.
As Ian says there are serious differences between the maps – for example – here are many places within the RED +4 degree anomaly contour which did not register a 4 degree anomaly for October according to the district stations listed by the BoM.
Wanaaring, Bourke, Nyngan, Moree, Walgett, Lightning Ridge, Collarenebri, Narrabri, Gunnedah Resource Centre was 4.1 but Gunnedah Airport only 2.3 (UHI in Gunnedah??), Coonabarabran, Inverell, Forbes, Parkes, Deniliquin, Corowa, Tocumwal, Griffith, Lake Cargelligo,
On the other hand I noticed Katoomba had a 4 degree anomaly but is way outside the RED contour.
On balance it looks like Ian is realistic to wonder – “One wonders if the BoM has a flawed shading formula which does not really reflect the actual temperatures.”
This could be a work in progress.
Good to see this new paper – A Reanalysis of Long-Term Surface Air Temperature Trends in New Zealand – by C. R. de Freitas & M. O. Dedekind & B. E. Brill.
Also great to see them use the Fig 3 twin diagram ex NASA GISS – that I have been drawing attention to for years as absolutely vital.
Climate Conversation Group has a blog yesterday – Paper adds interesting perspective on NZ temperature trend
The latest article by Ken Stewart – Rutherglen: Spot the Outlier – builds on the momentum started by Dr Jennifer Marohasy who was a key to articles in The Australian on 23-24 August which questioned the BoM ACORN SAT high warming adjusted temperature series. And of course Jo Nova has been active on this issue for a long time.
Top BoM people need to be questioned about ACORN SAT under conditions where there is no escape – then truth might emerge into the light.
The best reference I know to BoM station diaries is the 45 page summary by Simon Torok for his 1996 PhD thesis – “The development of a high quality historical temperature data base for Australia”
This can be downloaded in full in several parts at –
However the Appendix A1 containing the 45 page summary of all station diaries he accessed can be downloaded as an 8MB pdf at – p38/46 Rutherglen station histories – I note their is no entry for Amberley and the entry for Rutherglen is brief.
You get the picture. Western world economic future is being influenced by this stuff.
I saw these diaries in the BoM library at Lonsdale Street, Melbourne in the early 1990’s – a series of maybe foolscap ledgers. I assumed they were put into Commonwealth archives – National Archives of Australia.
If anybody can locate them – please let me know.
Checking Renmark Aero minimums for 7 days 2 August to 8 August 2014 and they average -3.97°C.
Renmark has two stations with daily max & min T available – 24016 Renmark with data from 1957 to 2001 which had no seven day spell in August even breaking zero. Then Renmark Aero 24048 with data from 1995.
The previous coldest 7 day spell I found was -2.2°C in Renmark Aero from 1st to 7th August 1999.
So this August smashed the record somewhat. There must be many more cold minimum records around SE Australia to be hunted out this month.
Checking Canberra Airport minimums for 14 days 2 August to 15 August 2014 and they average -4.55°C.
I think this is a record cold run of 14 cold minimums in August – since 1939 that is. The next coldest 14 day spell I found was -4.25°C from 4th to 17th August 1994.
Has anybody noticed this months cold reported? There must be other minimum records from this month.
While roughing it in a motel in the wilds of central NSW I heard the ABC weather lady say that Adelaide was enjoying a record cold August morning – a record since 1888 I think.
Yesterday was a pretty hard frost here so I have quickly checked a few records and it looks to me as though Hay, Hillston and Lake Victoria have had record cold mornings. Can anybody add to this list ? Or have additional info re Adelaide – South Australian cold.
It will be easier to check when the Sunday contoured map of minimum anomalies comes available.
Hay – yesterday -3.8 prev coldest -2.5 on 2 Aug 1997
Hillston yesterday -4.6 prev cold -3.3 on 7 Aug 1963
Lake Victoria yesterday -2.5 prev cold -1.4 on 16 Aug 1967
I just checked Google which finds no news on this – what would we hear if it was a record hot day?
On the 5th I posted – Southwest Queensland heat wave 2 July 2014 – pointing out the 10 degree error for the Bedourie max on 2 July.
After a couple more days the 30 was fixed to a 20 here.
But I see this morning 14th July after another week passes – that the 10 degree error is still in the AWAP maps.
How can the BoM which has been in existence for over a century – not have routine operating procedures in place to ensure that these tiny tasks are promptly done?
Would a 10 degree cold error have been repaired quicker?
The original error was only spotted because it was a huge standout anomaly.
What about errors that are more subtle and harder to spot?
What confidence can we have in the routine BoM AWAP temperature anomaly maps?
Brisbane records coldest morning in 103 years – despite the ever growing urban heat island – records falling in several other towns.
I am sure sure there will be more to say about this – too busy now.