A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).

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Australian Environment Conference Oct 20 2012



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Dennis Jensen MP — Calls for audit on the BOM and CSIRO data

Dennis Jensen, M.P. in the Australian Parliament, made a formal parliamentary request for an audit of the BOM and CSIRO data handling processes.

This is an excellent request, something Australia desperately needs. Good data on the climate.

Given how important our climate is, I’m sure Tim Flannery, The Climate Council, The Australian Conversation Foundation, and The Australian Greens will join us in demanding that the BOM and CSIRO datasets are independently audited. Naturally, all of us would want to ensure our climate data is of the highest quality possible and not subject to any kinds of confirmation bias, or inexplicable adjustments. Right? And maybe its even worse than we thought, so they will want to check, yes?

Let’s leave no stone unturned in making sure we understand the threats to the Australian environment, the impact on our farms and homes, and on our National Balance Sheet! How could any Green disagree?

Dennis Jensen talks about the response he got from the BOM and the questions he did not get answered:

” … the BOM state the temperature trend prior to 1910 is unreliable. But the IPCC use data on Australia going back to 1850. So [...]

Get Headlines! How to find a heatwave in five easy steps

Heatwaves have become a publicity tool. Far from there being a clear trend in Australian heatwaves, Geoff Sherrington shows that it’s also legitimate to claim heatwaves were worse 80 – 100 years ago in Adelaide and Melbourne and things are getting better. Those officials who cherrypick their claims might be technically correct, but it’s outrageously deceitful and unscientific at the same time.

Just how hard is it to get a record heatwave? It’s so easy that if it’s summer in Australia, it’s hard not to set a record. That’s because heatwaves come in so many flavors  –  there are seven capital cities which can all have 3 day, 4 day, 5 day or 6 day heatwaves. Then there are the heatwaves over 40C, or over 38 C, or over 35C… already that makes 84 flavours of wave. If a hot spell doesn’t break one type of wave, it could easily break another. Then there is the pre-heatwave, and there would be another 84 types of heatwaves that we haven’t had, but might get, you never know. You might think I’m kidding, but pre-heatwaves get headlines already:

“More Canberra heatwaves forecast”

“A heatwave could return to Canberra next month, [...]

Forgotten: Historic hot temperatures recorded with detail and care in Adelaide

What I found most interesting about this was the skill, dedication and length of meteorological data taken in the 1800′s. When our climate is “the most important moral challenge” why is it there is so little interest in our longest and oldest data?

Who knew that one of the most meticulous and detailed temperature records in the world from the 1800′s comes from Adelaide, largely thanks to Sir Charles Todd. The West Terrace site in Adelaide was one of the best in the world at the time, and provides accurate historic temperatures from  “Australia’s first permanent weather bureau at Adelaide in 1856″. (Rainfall records even appear to go as far back as 1839.)  Lance Pidgeon went delving into the National Archives and was surprised at what he found.

If we want to understand our climate the records from the 1800′s in Adelaide are surely worth attention?

The BOM usually shows graphs like this one below starting in 1911. You might think you are looking at the complete history of Adelaide temperatures and that smoothed temperature is rising inexorably, but the historic records remain unseen. While “hottest” ever records are proclaimed in [...]

Hottest September Ever in records going back 0.000003% of Earths history!

How about some perspective on those alarming headlines:

 Thanks to Steve Hunter

We are tying ourselves in knots over 150 year old records (or even less) when:

These are just short Australian records, not long global ones. Even in the 1800′s Australia recorded heatwaves of 50+ degrees. The world was similarly warm 1,000 years ago, definitely warmer 7,000 years ago, and a lot warmer 120,000 years ago. The world has been warmer for most of the last 500 million years. Satellites are more reliable, have better coverage, and don’t have dubious inexplicable adjustments. They show it was not a record angry summer, nor the hottest year we’ve had. [...]

Australia’s record hottest 12 month period? Not so say the Satellites

Another round of government-funded PR went out a couple of weeks ago, across the obedient Pravda-media. It told us about another meaningless “record” that was probably not a record, and wouldn’t tell us whether man-made warming was the cause, even if it was. Not a single journalist had the wherewithal, nous or intellectual honesty to search the Internet looking for a different point of view. Though, in their defense, how could they have guessed that Prof David Karoly wouldn’t know about the UAH satellite program to measure temperatures? (It has only been running since 1979.)

This below, are the 12 month averages over Australia by satellite. Graphed at Kens Kingdom by Ken Stewart, with no doctorate in climatology and no government funds.

In the troposphere over Australia it was a hot year but not a record.


For the third time this year we’ve been hit with claims of a “hottest ever” record that doesn’t tell us anything about the climate, but does reveal a lot about the sick state of government funded science, corrupted, decrepit, and so far from being scientific it might as well be run by Greenpeace.  If the government stopped funding climate science entirely, climate [...]

Australia’s Angry Hot Summer was hot angry hype– satellites show it was average

Lewis and Karoly 2013:  climate change is “likely” to blame for the hottest angry summer.

Did your air-conditioner make Australia the hottest angry summer ever? Could be. If we apply mystery-black-box-techniques to data from a few sparse thermometers averaged over thousands of square kilometers we can find a “record”. If we compare that “record” to  models that are known to be wrong, voila — then the coal fired power stations heated more than just your home, they heated the whole country.

On the other hand, if we use thousands of measurements from satellites that criss cross the nation day and night covering every corner of the land, we didn’t have a hot angry summer, we had a normal one. The Lewis and Karoly study is moot. If we caused a normal summer, is that so bad?

The not-angry-summer is visible with no statistical analysis.

According to UAH satellite measurements summer in early 2013 was not a record. Not even close.

Satellite records only go back to 1979, but to answer the question “was this the hottest ever summer” we only need records back as far as 2010.

The peer reviewed, comprehensive, Lewis and Karoly paper does not contain the [...]

Hottest summer record in Australia? Not so, says UAH satellite data

There are probably only ten people in Australia who haven’t heard it was the Hottest Ever, Record Summer Downunder. And they were probably born yesterday.

Summer here was so scorchingly awful it was Angry. But a funny thing happened on the orbit overhead. Check out the UAH satellite data on summers since the UAH records began.  The graph below (thanks to Ken) is the temperature data from the NASA satellites, processed by UAH (University of Alabama in Huntsville). Strangely there is a disparity between what the satellites recorded and the BOM.

The satellite data shows that the summer of 2012-2013 was close to ordinary, compared with the entire satellite record going back to 1979. Not a record. Not even extreme?

According to UAH satellite measurements summer in early 2013 was not a record. Not even close.

The graph data comes thanks to John Christy, Director, Earth System Science Center, Distinguished Professor, Atmospheric Science University of Alabama in Huntsville, Alabama State Climatologist and Roy Spencer. It was graphed by Ken Stewart at KensKingdom, and inspired by Tom Quirk at Quadrant. I was very happy to connect them this weekend. The data cover “average lower troposphere temperature anomalies for land grids [...]

Mystery black-box method used to make *all new* Australian “hottest” ever records

There were not many long term sites (in black dots) in the centre of Australia in 1930.

This summer the Bureau of Meteorology (BOM) invented a whole new metric to measure average national heat, which might be all very well except no-one (other than the BOM) seems to know what it is.

On January 7th the BOM claimed Australia set a new “average maximum daily temperature record”. Now the headlines are about the “hottest” Australian summer.

With both records, no one outside the BOM team has access to the methods or data. This post is about the new “daily” temperature of Australia used to declare Jan 7th was a record, but the same point applies to the “hottest summer” records, even though they may be a different data set. Where is the data? Where are the methods?

Is the BOM a science agency or a PR bureau?

The January 7th heatwave supposedly broke all previous “daily” records in this category — a dubious honor since no-one can remember any records like it.

It’s a bit like winning the Side-Jump. It’s not an event anyone knew was on until the medal ceremony. Worse, no one knows how the [...]

Not the hottest ever summer for most Australians in Sydney, Melbourne or Brisbane. Not “extreme” heatwaves either.

Despite the wild hype about records being broken, and how hot this summer has “felt” for most Australians there have been many hotter summers, and for millions of people this summer was not remarkable at all.

The BOM is planting the unscientific suggestion it “felt warm” when thermometers in most major centres tell us it was just summer. The population of Sydney, Brisbane and Melbourne combined is almost 11 million. Nearly 50% of all Australians experienced an average to above average summer, but none of them experienced an extreme summer or a record hot season.

Since there are 100 different ways of measuring a “record”, could it be the BOM is cherry picking whatever record it can find, but ignoring all the non-records, the average measurements, and the ordinary heat?

Melbourne, hot but not extreme

In Melbourne there have been nine hotter summers, and two of those were more than a century ago. Those summers weren’t just a bit hotter. It was nearly a whole degree hotter (as an average of maximum summer temperatures) in 1898 and 1951.

In Melbourne this summer qualifies as the tenth hottest. It was far hotter in 1898, 1951, 1981, and 2001


Much [...]

How well did that 50 degree forecast work out for the BOM?

You could almost be forgiven for wondering if the Bureau of Meteorology is a science unit or a PR agency. They seem professionally adept at getting headlines, but not so hot at predicting the weather.

On Jan 7th the BOM models forecast 50 spanking hot degrees across hundreds of square kilometers in central Australia. But it was a whole week ahead, the prediction itself cooled with a day or two, and in the area under the “purple searing spot” the result on Jan 14th ended up being around 40C instead. That’s fine in itself — predictions are difficult. What’s not fine is the PR storm that ensued, which is still being used, as if somehow the very fact that our faulty climate models predicted a record temperature (but failed) is evidence of man-made global warming. How many thousands of people all around the world now think that Australia had a 50C plus day this January? Did anywhere hit the fifty mark? No report of one so far. Watch the loop of Australia’s January temperatures here. The highest brown bar on that graph is 45 – 48C, and those hot spots are a thousand kilometers from the purple patch.

That said, [...]

Eight reasons the Australian heatwave is not “climate change”

Eight  reasons why this current heatwave is a boring, overhyped example of weather being used for political purposes.

1. It’s the long term trends that matter — not a few weeks of hot weather

As climate scientists keep telling us (except when they have a heatwave to milk), ”weather is not climate”. It’s the long term trends that matter. One short four week period is not a long term climate trend, but it is an excellent opportunity to create hype and scaremongering in the newspapers. Scientists with little scruple and low standards are making the most of this.

2. The “records” we are breaking are pitifully short

Even if this is the hottest heatwave “ever recorded”, it doesn’t mean much in the long term scheme of things. Natural climate cycles work on scales of 11 years, 60 years, 200 years, 1500 years, and 100,000 years. We have decent temperature records for many locations for only 50 years. We have a scratchy patchy thermometer record for 150 years. Any scientist raving about breaking a 50 year record as if it means something is … embarrassing. There is too much noise in this system and too little data.

3. If a few weeks [...]

Australia – was hot and is hot. So what? This is not an unusual heatwave

The media are in overdrive, making out that “the extreme heat is the new normal” in Australia. The Great Australian Heatwave of January 2013 didn’t push the mercury above 50C at any weather station in Australia, yet it’s been 50C (122F) and hotter in many inland towns across Australia over the past century. See how many are in the late 1800′s and early to mid 1900′s. You can’t blame those high records on man made global warming.  [feel free to post some old records of your own and the source reference we can check and we will update the map]

 Did CO2 cause extreme heat in the 1820′s?

In explorer Charles Sturt’s time it was so hot that thermometers exploded. Was this Australia’s hottest day all the way back in 1828? It was 122F or 53.9C! Naturally it is not a BOM-registered-record (the BOM did not exist then). Nonetheless, Charles Sturt was engaged to explore the nation and given careful instructions to take accurate readings of the climate. Yes, inadequate thermometer shading may have exaggerated the maximum by 1C, 2C, maybe even 3C, but at 50.9C it would still have been considerably hotter than anywhere in January 2013.

Even that [...]

Extreme heat in 1896: Panic stricken people fled the outback on special trains as hundreds die.

Photo: Jo Nova

Post by: Lance Pidgeon with assistance from Chris Gillham and others.

It is as if history is being erased. For all that we hear about recent record-breaking climate extremes, records that are equally extreme, and sometimes even more so, are ignored.

In January 1896 a savage blast “like a furnace” stretched across Australia from east to west and lasted for weeks. The death toll reached 437 people in the eastern states. Newspaper reports showed that in Bourke the heat approached 120°F (48.9°C) on three days (1)(2)(3). The maximumun at or above 102 degrees F (38.9°C) for 24 days straight.

By Tuesday Jan 14, people were reported falling dead in the streets. Unable to sleep, people in Brewarrina walked the streets at night for hours, the thermometer recording 109F at midnight. Overnight, the temperature did not fall below 103°F. On Jan 18 in Wilcannia, five deaths were recorded in one day, the hospitals were overcrowded and reports said that “more deaths are hourly expected”. By January 24, in Bourke, many businesses had shut down (almost everything bar the hotels). Panic stricken Australians were fleeing to the hills in climate refugee trains.  As reported at the time, the government felt [...]

Oops Climate Commission graph: Queensland warmed nearly 3 degrees in 50 years?

If Alan Jones needs to get “educated” because he got the level of CO2 wrong once, the Climate Commission surely needs to go back to do high school maths, because anyone who has done junior high can see that the running average in the graph below is an impossibility. The latest Climate Commission report: “The Critical Decade: Queensland climate impact and opportunities” starts with blatantly incorrect figure. Since when do “averages” run outside the extreme highs and lows? Thanks to reader Ian E.

Eyeballing this graph suggests Queensland’s average temperature has risen by 2.7 C since the 1950′s.

The text on the same page says: “The average temperature for Queensland has risen by about 1°C since early last century”. So at least the writing matches the official (if exaggerated) records.

Who proof-read this document?

Three professors (Will Steffen, Lesley Hughes, Veena Sahajwalla) and Mr Gerry Hueston, all Climate Commissioners, signed off on it.

The correct graph should look more like this.

 (Graphed by Ian E)

Even the 1 degree trend in this graph above is likely to be exaggerated [...]

Charles Sturt’s time: so hot that thermometers exploded. Was Australia’s hottest day in 1828? 53.9C!

Australia’s hottest day? Not 2010, but 1828 at a blistering 53.9 °C

Back before man-made climate change was frying Australia, when CO2 was around 300ppm, the continent savoured an ideal preindustrial climate, right? (This is the kind of climate we are spending $10bn per annum to get back too?)

We are told today’s climate has more records and more extremes than times gone by, but the few records we have from the early 1800’s are eye-popping.  Things were not just hotter, but so wildly hot it burst thermometers.  The earliest temperature records we have show that Australia was a land of shocking heatwaves and droughts, except for when it was bitterly cold or raging in flood.

In other words, nothing has changed, except possibly things might not be quite so hot now.

Silliggy (Lance Pidgeon) has been researching records from early explorers and from newspapers. What he has uncovered is fascinating. — Jo


Charles Sturt  (1930 postage stamp) Wikimedia

Lance Pidgeon writes:


These Australian headlines from the 1800′s above describe extremes the early colonists faced. At the time the European explorers who were instructed and equipped to [...]

Has North Victoria cooled, and is that the ghost of a solar cycle signal we see?

UPDATED AGAIN #4 — Now with Vukcevics Hale cycle graph of Echuca.  and #3  David Archibalds suggestion of the Hale Cycle at work. #2 with Willis Eschenbach’s graph and my thoughts, (see below)

Ian Bryce sent me a striking graph (or two). Looking at the original raw data from Echuca Victoria shows a dramatic cooling trend of nearly half a degree since 1900, and rather than being a siting anomaly, it’s repeated in two towns about 100km away.

Curiously he also finds peaks in the maximums at Echuca that look for all the world like they match the solar cycle. Is it a fluke, or could it be real?  If it’s real, what conditions make the solar sun-spot cycle so apparent in Echuca — where its maximum temperatures seemingly peak with each second solar cycle. Can anyone find this signal in other places? — Jo


The area is inland Northern Victoria

Has there been Global Warming or Global Cooling in Echuca

Guest post: Ian Bryce

I have spent about 37 years working with processing tomatoes in the Goulburn Valley in Australia, and the last 25 years or so, with research into growing and processing canning tomatoes. Since 1984, our [...]

Threat of ANAO Audit means Australia’s BOM throws out temperature set, starts again, gets same results

Joanne Nova and Ken Stewart

A team of independent auditors, bloggers and scientists went through the the BOM “High Quality” (HQ) dataset and found significant errors, omissions and inexplicable adjustments. The team and Senator Cory Bernardi put in a Parliamentary request to get our Australian National Audit Office to reassess the BOM records. In response, the BOM, clearly afraid of getting audited, and still not providing all the data, code and explanations that were needed, decided to toss out the old so called High Quality (HQ) record, and start again. The old HQ increased the trends by 40% nationally, and 70% in the cities.

So goodbye “HQ”, hello “ACORN”. End result? Much the same.

That meant the ANAO could avoid an audit, since the BOM had changed data-sets, the point of auditing the old set was moot.

For me, this version is so much worse than the previous one. In the HQ data set the errors could have been inadvertent, but now we’ve pointed out the flaws, there can be no excuses for getting it wrong. Instead of fixing the flaws (and thanking the volunteers), it’s almost as if they’ve gone out of their way [...]

Australian temperature records shoddy, inaccurate, unreliable. Surprise!

The BOM say their temperature records are high quality. An independent audit team has just produced a report showing that as many as 85 -95% of all Australian sites in the pre-Celsius era (before 1972) did not comply with the BOM’s own stipulations. The audit shows 20-30% of all the measurements back then were rounded or possibly truncated. Even modern electronic equipment was at times, so faulty and unmonitored that one station rounded all the readings for nearly 10 years! These sloppy errors may have created an artificial warming trend. The BOM are issuing pronouncements of trends to two decimal places like this one  in the BOM’s Annual Climate Summary 2011 of “0.52 °C above average”  yet relying on patchy data that did not meet its own compliance standards around half the time.  It’s doubtful they can justify one decimal place, let alone two?

We need a professional audit.


A team of independent engineers, scientists, statisticians and data analysts (brought together by the joannenova blog) has been going through the Australia Bureau of Meteorology records (BOM). They’ve audited some 8.5 million daily observations across 237 High Quality and other close sites in Australia. Shockingly, while [...]

2011 was 51st warmest year in Australia!

Despite all the headlines we see, 2011 in Australia was remarkable for its extraordinary averageness. It is a rare year that is more average than 2011 was.

(This email was spotted on it’s way to various government officials.  – Jo)


Guest post from Steve Woodman 2011 was the 52nd coldest year on record in Australia, colder than 1912, 1914, 1915 & 1919

Alarmist propaganda outlets such as the ABC were clearly disappointed by 2011 and were forced to resort to decadal temperatures rather than individual years to provide it with its headlines 1:

“Last decade equals warmest on record: UN”

The article then goes on to say:

“2011 ranks as the 10th warmest year since 1850, when accurate measurements began”

That may be so in a global sense, but if the ABC took a more local perspective, in Australia, 2011 was below the 1961-1990 average (see the graph below) 2.


Shut down Australia and save 0.01 degrees

The key question — with all the billions spent on cutting Australia’s carbon production: the trade and income lost; the jobs cut; the pain of living near wind farms; the foreign holidays avoided and then paying more for petrol and electricity than we have to — how many degrees will our actions cool the world by?

Assuming the IPCC are right about the effects of CO2, and that Australia stopped producing CO2 entirely (if we all left the country) by 2100 the world would be 0.0123 degrees cooler, and sea levels would be 2mm lower. These are so small they are unmeasureable.

Abandon Australia and save


The statistics every Australian should know: Australia produced 1.38% of global human emissions of CO2 in 2011. (EIA, 2011a) Each year global emissions increase by twice Australia’s total annual output. (2.8%/year (EIA, 2011a). If we all emigrated and left a bare deserted continent, it puts off the warmer Armageddon by just six months. [...]