Author Archive | jennifer

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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 […]

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The electronic probes and liquid-in-glass thermometers are housed in the white box (the Stevenson screen) in the foreground of this picture of Wilsons Promontory lighthouse.  It is unfortunate that solar panels have been installed such that they are facing the box with the thermometers - I have complained about this in previous correspondence.  This photograph was taken by Daynaa (daynaa2000.wordpress.com) with permission to republished requested in 2015.

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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Jen Marohasy at the Goulburn weather station where the Bureau acknowledges it set a limit of minus 10 degrees on how cold a temperature could be recorded this winter, never mind that this  AWS recorded minus 10.9 degrees Celsius during a previous winter.

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 devices […]

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Peter Ridd, Professor of Physics, James Cook University, Townsville

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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Proxy temperature record (blue) and ANN projection (orange) based on input from spectral analysis for this Northern Hemisphere multiproxy.  The ANN was trained for the period 50 to 1830; test period was 1830 to 2000.

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 […]

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Since the installation of an automatic weather station at Thredbo, there has been a reduction in the number of days each year when the temperature has fallen to, or below minus 10.0 degree Celsius - from an average of 2.5 (1966 to 1996) to 1.1 days (1997 to July 2017).   As a matter or urgency, the Bureau needs to explain when the limits were placed on the minimum temperature that could be recorded at this, and other,  automatic weather stations.

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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Snow Gums at Thredbo.

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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Jennifer Marohasy visiting the Goulburn weather station on 31st July

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 […]

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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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Jennifer walking in the rain along Weyba Creek,  Noosaville, August 2014.

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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