Site: Jennifer Marohasy

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Jennifer Marohasy: 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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2017-11-12 21:41   Click to comment

Jennifer Marohasy: 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

The post Averaging by…

2017-10-16 19:17   Click to comment

Jennifer Marohasy: 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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2017-09-28 04:09   Click to comment

Jennifer Marohasy: 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:…

2017-09-11 13:37   Click to comment

Jennifer Marohasy: 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

The post John has Plus 10 Degrees, Bureau Loses…

2017-09-11 04:45   Click to comment

Jennifer Marohasy: 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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2017-09-07 17:17   Click to comment

Jennifer Marohasy: Vindicated: Bureau acknowledges limits set on how cold temperatures can be recorded

THE Bureau has a network of 695 automatic weather stations (AWS) across Australia. In a report released late yesterday it acknowledged issues with the performance of just two of these: Goulburn Airport (Goulburn) and Thredbo Top Station (Thredbo). These are the same two weather stations that I reported at my blog were not recording temperatures

The post Vindicated: Bureau acknowledges limits…

2017-09-07 15:58   Click to comment

Jennifer Marohasy: Are Recordings from Electronic Devices Comparable – or Not?

Because a change in equipment can potentially create discontinuities in a temperature record, it is Australian Bureau of Meteorology policy to have new equipment recording side-by-side with old equipment for a period of at least 2 years. In this way, readings from the new equipment can be compared with readings from the old equipment, including

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2017-09-06 03:09   Click to comment

Jennifer Marohasy: Two Decades of Temperature Data from Australia – Not Fit for Purpose

Australia is a large continent in the Southern Hemisphere. The temperatures measured and recorded by the Australian Bureau of Meteorology contribute to the calculation of global averages. These values, of course, suggest catastrophic human-caused global warming. Two decades ago the Bureau replaced most of the manually-read mercury thermometers in its weather stations with electronic devises

2017-09-01 13:26   Click to comment

Jennifer Marohasy: Concerned About Prof Peter Ridd

I have been chatting off-and-on with Peter Ridd, now Professor of Physics at James Cook University, for nearly two decades. We both resent the lack of honesty in the reporting of many environmental issues. Earlier this week, Prof Ridd was concerned that his recent comments to Sid Maher at The Australian newspaper [1], and then

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2017-08-25 04:56   Click to comment

Jennifer Marohasy: Most of the Recent Warming Could be Natural

AFTER deconstructing 2,000-year old proxy-temperature series back to their most basic components, and then rebuilding them using the latest big data techniques, John Abbot and I show what global temperatures might have done in the absence of an industrial revolution.  The results from this novel technique, just published in GeoResJ [1], accord with climate sensitivity

The post Most of the…

2017-08-20 22:52   Click to comment

Jennifer Marohasy: Four-Steps Needed to Restore Confidence in Bureau’s Handling of Temperature Data

THE Minister for Environment and Energy, Josh Frydenberg, needs to immediately instigate the following four-step process to restore confidence in the recording and handling of historical temperature data. Step 1 – Instruct the Bureau to immediately: 1. Lift any limits currently placed on the recording of minimum temperatures; 2. Make publicly available the dates on

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2017-08-08 02:12   Click to comment

Jennifer Marohasy: Remembering Diane Ainsworth

I can’t find a good photograph of Diane Ainsworth – one that does her justice. Thirty years ago, she had a cheeky smile, deep-set eyes, mousey-coloured thick wiry hair, and a very thin waist. We were friends at boarding school, and in the same hockey team: I was the centre-forward and she my fast and

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2017-08-06 00:27   Click to comment

Jennifer Marohasy: Bureau of Inconsistencies: Need for Urgent Independent Inquiry

MINISTER Josh Frydenberg was told by the Australian Bureau of Meteorology on, or about, Wednesday 5th July 2017 that limits had been placed on how cold temperatures could be recorded across mainland Australia. This winter we have experienced record low temperatures.   But only the keenest weather observers have noticed, because the Bureau has been changing

The post Bureau of…

2017-08-03 01:35   Click to comment

Jennifer Marohasy: Bureau Misleads Minister Frydenberg on Goulburn

RATHER than admit that temperature dropped to a record low -10.4 degree Celsius on the morning of Sunday 2nd July at Goulburn, the Bureau of Meteorology has come-up with yet another even more absurd story. Responding to a letter from Josh Frydenberg, the Minister for  Environment and Energy, Andrew Johnson, CEO and Director of Meteorology,

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2017-07-30 10:29   Click to comment

Jennifer Marohasy: Skilful Monthly Rainfall Forecasts

THE accurate weather forecast of James Stagg back in June 1944 is considered crucial to the successful D-day invasion that changed the course of WWII. Should we find ourselves at war again, is there an institution or individual capable of providing an accurate short or long-term weather forecast? Dr John Abbot and I are working towards

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2017-07-24 11:37   Click to comment

Jennifer Marohasy: Bureau Still Limiting Cooling to Minus 10 Degrees

TWO weeks ago, in response to my queries the Australian Bureau of Meteorology acknowledged that it had put in place limits on the lowest temperature that an individual weather station could record.  So, when the automatic weather station which now operates in the town of Goulburn (not far from Canberra), recorded a measurement of minus

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2017-07-18 10:28   Click to comment

Jennifer Marohasy: In Search of a New Way

FIFTY years ago, on 7 July 1967, Time magazine ran a cover story entitled, ‘The Hippies: Philosophy of a Subculture’.   Modern environmentalism is in some ways a product of this Flower Power movement, but a still-born version. It has become replete with particular moral codes – right ways of doing things – ostensibly underpinned by a

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2017-07-07 09:55   Click to comment

Jennifer Marohasy: Bureau Now Sets Strict Limits on Cooling

OVER recent years I have documented the blatant remodelling of temperature measurements through the process of homogenisation. I have explained that it is the homogenised datasets that are used to report climate change by the Australian Bureau of Meteorology and the CSIRO.   I had assumed, however, that the raw data, kept in the CDO dataset,

The post Bureau Now Sets Strict Limits on Cooling

2017-07-05 01:18   Click to comment


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