BoM makes large warming adjustments to minimum temperatures prior 2007 in its own professionally collected Cobar Met Office data but fails to include the 2007 adjustment in their own 2014 published list – Episode 2 Cobar ACORN-SAT

This is the second episode in the Cobar ACORN-SAT series examining BoM adjustments to the CDO temperature data – here I start to look at adjustments to minimum temperatures. The 1st episode looked at maximum temperatures. A list of ACORN adjustments to Cobar data is here and you can see the first min adjustment listed […]

How the BoM ACORN SAT project has reconstructed Cobar temperature data commencing with an obviously invalid adjustment – Episode 1 Cobar ACORN-SAT

A reader has asked me to look at how ACORN-SAT has adjusted Cobar temperature data. Cobar is an old site with Post Office data from 1881 – then in 1963 the BoM opened the Cobar Met Office on the north side of town. Map from Google Earth with MO marked by “green X”. Detail of […]

1910 Bureau of Meteorology report shows Canberra region temperatures pre-1909 were similar to the ten years 2004-2013

The BoM was asked to calculate the climate of the Canberra district in the process of deciding on a location for the Australian Federal Capital Territory – Chris Gillham alerted me to this report and he has his own comments on the data in a 1Mb pdf report. Looking at the temperature data in the […]

Reprising hot Januaries over Australia and while we are at it – how hot was January 1896

Remember the post two years ago by JoNova – Extreme heat in 1896: Panic stricken people fled the outback on special trains as hundreds die. Since then of course the BoM has shouted to the rooftops that January 2013 was the “hottest evah”. This issue has been given some impetus after the speech in parliament […]

The Conversation blog in discussing “was the 1896 heatwave wiped from the record?” – wipes BoM 1996 peer reviewed finding from the records

“The Conversation” has this recent blog article – FactCheck: was the 1896 heatwave wiped from the record? – which is critical of the speech in parliament by Commonwealth MP for the Federal seat of Dawson, Mr George Christensen. In his speech – which you can see on YouTube – Mr Christensen made the point that […]

Australian Bureau of Meteorology claims that NSW has had its hottest October ever – does the data really back up their claim ?

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 […]

New peer reviewed paper finds that New Zealand warms at only 0.28°C per century compared to Govt NIWA trend of 0.91.

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 […]

The Australian Bureau of Meteorology needs to be questioned about their temperature adjustments – under conditions such as at a Royal Commission or at Senate Estimates

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 […]

It is time to get Australian Bureau of Meteorology station histories out of archives – we need to see how good BoM metadata is

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 – minerva-access.unimelb.edu.au/handle/11343/39449

However the Appendix A1 containing the 45 page […]

Renmark Aero has coldest ever 7 day run of August minimum temperatures – that is in eastern South Australia

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 […]