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New category now for the Australian Bureau of Meteorology (BoM) ACORN SAT “Rolls Royce” adjusted temperature series

Just click on the ACORN category and the seven articles come up starting June 2012.

Sydney temperature history – BoM raw data compared to ACORN adjusted data

Here is Sydney raw max & min annual temperature history – This shows raw compared to ACORN also annual – you easily see where the effective adjustments are concentrated. From 1 Jan 1983 on to present day there are no adjustments made to the daily max data. There are however some days when the raw [...]

BoM says re Hobart on 1st April 2014, “..31 degrees Celsius was the hottest April day since records started in 1881.”, but history shows sites nearby experienced several relatively hotter events

The ABC reports – Records melt as Hobart swelters through hottest April day in 132 years – Checking hottest April day statistics at this BoM page – just amend the station number in the URL. Checking daily data a month at a time in District 94 on Australian Weather News AWN – April 2005 at [...]

NOAA speaks with various maps to show February temperatures over the USA 48

I saw this issue at Anthony Watts which was from Joe D’Aleo – commenting on the less than stellar NOAA map. Which several commenters seemed to distrust. Curiosity got me looking in NOAA for the original – which I did not find – but I found this map below which gives a more balanced view [...]

The Australia Bureau of Meteorology says Perth’s record-smashing summer was “madness” – how about summer where you were?

Here is a map of the maximum temperature anomalies for summer. WA’s ‘mad’ summer is proof of climate change: BoM expert – PerthNow The national average was under +0.5°C. I think the Perth BoM needs a Bex a cuppa tea and a good lie down. below you can see each day of the Perth summer [...]

Open Peer Review Journal – publishing new research into urban heat island UHI effects in global temperature compilations

Dr. Ronan Connolly has sent me their paper Urbanization bias I. Is it a negligible problem for global temperature estimates? R. Connolly, and M. Connolly (2014). Open Peer Rev. J., 28 (Clim. Sci.), ver. 0.1 (non peer reviewed draft). A quick read through has impressed me sufficiently that the authors can be a force to [...]

Launceston temperature history illustrates how BoM inserts a large warming trend where raw data shows little change over 100 years

In 2012 the Australian Bureau of Meteorology brought out their ACORN SAT highly adjusted and warmed temperature data for just over 100 stations with all data commencing in 1910. Launceston starts in 1885 but the early data has gaps so we start at 1910 comparing raw data trends with warming trends from the BoM highly [...]

Australian Bureau of Meteorology takes urban heat island (UHI) into account when announcing heat records

I have just been told by the Parliamentary Secretary to the Minister for the Environment – Senator the Hon Simon Birmingham – that when _ “…the Bureau publishes relevant records of weather and climate occurrences and extremes based on observations from sites around the country.” The BoM is “…taking into account any urban heat island [...]

How many times does a truth have to be told ? – UHI warming has been cemented into global temperature series by adjusting for steps outward from cities

I see Anthony Watts article on a new paper in Theoretical and Applied Climatology – “Effect of data homogenization on estimate of temperature trend: a case of Huairou station in Beijing Municipality”. Thanks to Springer for making this paper open access. My point here is that this diagram which shows how UHI warming gets fixed [...]

More series to consider re question has the Australian land temperature seen its hottest 12 months ever

These 12 month average trends show a strong cyclic influence on Australian temperatures. GISS, GHCN CAMS and NCDC land data are now updated at KNMI. GISS supports the BoM which finds the 12 month average mean temperature over Australia has been warmer than ever over recent months. NCDC finds that periods in 2005 and 2010 [...]