Fig. 1. When the frequency of specific temperatures/data points as measured from the mercury thermometer at Mildura after July 2012 are plotted, it is evident that the data is not normally distributed.  This makes statistical comparisons with measurements from the electronic probe problematic.

BoM Blast for Dubious Record Hot Day

IN September 2017, the Australian Bureau of Meteorology (BoM) claimed a series of new record hot days across south eastern Australia, including on 23 September at Mildura. At that time, the mainstream media reported this as a new record for the state of Victoria, specifically claiming it was the hottest September day ever recorded – […]

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Peter Ridd and Jennifer Marohasy speaking about the need for quality assurance in science last November in Sydney.

Peter Ridd Asks for your Help – Now

PROFESSOR Peter Ridd is a physicist at James Cook University who has dared to question scientific findings that purport to show the Great Barrier Reef is in trouble. Specifically, he has been formally censured by the University and told to remain quiet about the matter – or risk his job. The issue dates back to […]

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This plot of changes in the extent of sea ice suggests that the South Pole was gaining in ice from at least 1980 to 2015, contrary to the Pope's encyclical issued in 2015. The significant 'melt' in 2016 corresponded with the super El Nino and minimum declination of the moon.

Avoid Fake News: Listen to Alternative Perspectives

IT was all over the news this morning: Pope Francis condemning ‘fake news’, which he defined as: The spreading of disinformation… It has to do with false information based on non-existent or distorted data meant to deceive and manipulate the reader. In fact, the Pope is guilty of exactly what he preaches against, particularly with […]

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Screen shot of the 'Monthly mean maximum temperature' page for St Helens Aerodrome at the Bureau's website

Already Hottest January on Record for St Helens, Tasmania

LAST week, Andrew Johnson, CEO of the Australian Bureau of Meteorology, wrote that the Bureau’s “stewardship of Australia’s temperature record” had been found to be scientifically sound [1]. He also claimed it was in accordance with World Meteorological Organisation guidelines. In fact, it’s not. If it was scientifically sound, or in accordance with WMO guidelines, […]

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Historically, alcohol thermometers were used to measure minimum temperatures, and mercury thermometers were used to measure maximum temperatures - across Australia.  Then on 1 November 1996, the Bureau changed their 'primary instrument' to electronic sensors.

A Law Unto Themselves: The Australian Bureau of Meteorology

Sunday, 12th November 2017 – 4PM Honourable Josh Frydenberg MP Minister for Environment and Energy Dear Minister Re: Suspend announcement of new record hot days – Inform WMO that Bureau’s measurements are currently not comparable with mercury thermometers – Give directive for release of more A8 forms – Establish an audit mechanism 1. BACKGROUND I […]

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Scroll to the end of this post to download the entire spreadsheet with all 60 numbers for each worked example.

Averaging by Convention – or Not

FOR some time, weather enthusiasts across Australia have been noticing rapid temperature fluctuations at the ‘latest observations’ page at the Australian Bureau of Meteorology’s website. For example, Peter Cornish, a retired hydrologist, wrote to the Bureau on 17 December 2012 asking whether the 1.5 degrees Celsius drop in temperature in the space of one minute […]

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Before the advent of irrigation the Murray river would run dry during periods of extended drought.  These were exceptionally hot years in the Murray Darling Basin.

Faux Record Hot Days, Including at Mildura

Alan Jones AO Radio 2GB, Sydney Dear Alan, This spring has begun with the Bureau of Meteorology announcing a new ‘hottest September day on record’ almost every other day. Last Saturday, for example, we heard that it was the hottest September day in Mildura since 1889. Really? Hotter than 1905 or even 1938 – those […]

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Jennifer Marohasy and Lance Pidgeon at the Goulburn AWS in early August 2017.

Bureau Management Rewrites the Rules – Again

Following is the latest advice from the Australian Bureau of Meteorology regarding measurement of temperatures from automatic weather stations (AWS). This advice contains numerous errors of fact and is inconsistent with the information in an internal review issued just last Thursday. The following misinformation has just been posted at the official Bureau website: http://www.bom.gov.au/inside/AWS_Review_Fast_Facts.pdf My […]

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John Abbot standing in front of the Noosa River, Queensland - not far from the Climate Lab where he works on rainfall forecasting using artificial neural networks.

John has Plus 10 Degrees, Bureau Loses Minus 10 Degrees

He studied chemistry at Imperial College, London, has 10 degrees, including a law degree, and has published more than 100 scientific papers. I’m referring to my husband, John Abbot. He is also a man of few words. Last Friday morning, after flipping through the Australian Bureau of Meteorology’s latest 77-page internal report – Review of […]

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The value of minus 10.4 marked with a red asterisk is the lowest one second measurement for the previous 60 seconds to 6.17am on 2 July 2017 at Goulburn airport.  This one second reading was initially rounded-up up to -10.0, but after some protesting was recorded in the ADAM database as the minimum for Goulburn airport for that day - and a new record for July.

Vindicated: Bureau not following WMO guidelines

TWO decades ago the Australian Bureau of Meteorology replaced most of the manually-read mercury thermometers in its weather stations with electronic probes that could be read automatically – so since at least 1997 most of the temperature data has been collected by automatic weather stations (AWS). Before this happened there was extensive testing of the […]

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