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Old 09-15-2013, 09:12 PM   #52
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Global warming is just HALF what we said: World's top climate scientists admit computers got the effects of greenhouse gases wrong

Leaked report reveals the world is warming at half the rate claimed by IPCC in 2007
Scientists accept their computers 'may have exaggerated'

By David Rose

PUBLISHED: 16:01 EST, 14 September 2013 | UPDATED: 03:21 EST, 15 September 2013

A leaked copy of the world’s most authoritative climate study reveals scientific forecasts of imminent doom were drastically wrong.

The Mail on Sunday has obtained the final draft of a report to be published later this month by the UN Intergovernmental Panel on Climate Change (IPCC), the ultimate watchdog whose massive, six-yearly ‘assessments’ are accepted by environmentalists, politicians and experts as the gospel of climate science.

They are cited worldwide to justify swingeing fossil fuel taxes and subsidies for ‘renewable’ energy.

Yet the leaked report makes the extraordinary concession that the world has been warming at only just over half the rate claimed by the IPCC in its last assessment, published in 2007.

Back then, it said that the planet was warming at a rate of 0.2C every decade – a figure it claimed was in line with the forecasts made by computer climate models.

But the new report says the true figure since 1951 has been only 0.12C per decade – a rate far below even the lowest computer prediction.

The 31-page ‘summary for policymakers’ is based on a more technical 2,000-page analysis which will be issued at the same time. It also surprisingly reveals: IPCC scientists accept their forecast computers may have exaggerated the effect of increased carbon emissions on world temperatures – and not taken enough notice of natural variability.

lThey recognise the global warming ‘pause’ first reported by The Mail on Sunday last year is real – and concede that their computer models did not predict it. But they cannot explain why world average temperatures have not shown any statistically significant increase since 1997.

lThey admit large parts of the world were as warm as they are now for decades at a time between 950 and 1250 AD – centuries before the Industrial Revolution, and when the population and CO2 levels were both much lower.

lThe IPCC admits that while computer models forecast a decline in Antarctic sea ice, it has actually grown to a new record high. Again, the IPCC cannot say why.

lA forecast in the 2007 report that hurricanes would become more intense has simply been dropped, without mention.

This year has been one of the quietest hurricane seasons in history and the US is currently enjoying its longest-ever period – almost eight years – without a single hurricane of Category 3 or above making landfall.



One of the report’s own authors, Professor Myles Allen, the director of Oxford University’s Climate Research Network, last night said this should be the last IPCC assessment – accusing its cumbersome production process of ‘misrepresenting how science works’.

Despite the many scientific uncertainties disclosed by the leaked report, it nonetheless draws familiar, apocalyptic conclusions – insisting that the IPCC is more confident than ever that global warming is mainly humans’ fault.

It says the world will continue to warm catastrophically unless there is drastic action to curb greenhouse gases – with big rises in sea level, floods, droughts and the disappearance of the Arctic icecap.

Last night Professor Judith Curry, head of climate science at Georgia Institute of Technology in Atlanta, said the leaked summary showed that ‘the science is clearly not settled, and is in a state of flux’.

She said it therefore made no sense that the IPCC was claiming that its confidence in its forecasts and conclusions has increased.

For example, in the new report, the IPCC says it is ‘extremely likely’ – 95 per cent certain – that human influence caused more than half the temperature rises from 1951 to 2010, up from ‘very confident’ – 90 per cent certain – in 2007.

Prof Curry said: ‘This is incomprehensible to me’ – adding that the IPCC projections are ‘overconfident’, especially given the report’s admitted areas of doubt.

Starting a week tomorrow, about 40 of the 250 authors who contributed to the report – and supposedly produced a definitive scientific consensus – will hold a four-day meeting in Stockholm, together with representatives of most of the 195 governments that fund the IPCC, established in 1998 by the World Meteorological Organisation (WMO) and the United Nations Environment Programme (UNEP).

The governments have tabled 1,800 questions and are demanding major revisions, starting with the failure to account for the pause.

Prof Curry said she hoped that the ‘inconsistencies will be pointed out’ at the meeting, adding: ‘The consensus-seeking process used by the IPCC creates and amplifies biases in the science. It should be abandoned in favour of a more traditional review that presents arguments for and against – which would better support scientific progress, and be more useful for policy makers.’ Others agree that the unwieldy and expensive IPCC assessment process has now run its course.

Prof Allen said: ‘The idea of producing a document of near-biblical infallibility is a misrepresentation of how science works, and we need to look very carefully about what the IPCC does in future.’

Climate change sceptics are more outspoken. Dr Benny Peiser, of the Global Warming Policy Foundation, described the leaked report as a ‘staggering concoction of confusion, speculation and sheer ignorance’.

As for the pause, he said ‘it would appear that the IPCC is running out of answers .  .  . to explain why there is a widening gap between predictions and reality’.

The Mail on Sunday has also seen an earlier draft of the report, dated October last year. There are many striking differences between it and the current, ‘final’ version.

The 2012 draft makes no mention of the pause and, far from admitting that the Middle Ages were unusually warm, it states that today’s temperatures are the highest for at least 1,300 years, as it did in 2007. Prof Allen said the change ‘reflects greater uncertainty about what was happening around the last millennium but one’.

A further change in the new version is the first-ever scaling down of a crucial yardstick, the ‘equilibrium climate sensitivity’ – the extent to which the world is meant to warm each time CO2 levels double.

As things stand, the atmosphere is expected to have twice as much CO2 as in pre-industrial times by about 2050. In 2007, the IPCC said the ‘likeliest’ figure was 3C, with up to 4.5C still ‘likely’.

Now it does not give a ‘likeliest’ value and admits it is ‘likely’ it may be as little as 1.5C – so giving the world many more decades to work out how to reduce carbon emissions before temperatures rise to dangerous levels.

As a result of the warming pause, several recent peer-reviewed scientific studies have suggested that the true figure for the sensitivity is much lower than anyone – the IPCC included – previously thought: probably less than 2C.

Last night IPCC communications chief Jonathan Lynn refused to comment, saying the leaked report was ‘still a work in progress’.

MET OFFICE'S COMPUTER 'FUNDAMENTALLY FLAWED' SAYS NEW ANALYSIS

The British Met Office has issued ‘erroneous statements and misrepresentations’ about the pause in global warming – and its climate computer model is fundamentally flawed, says a new analysis by a leading independent researcher.

Nic Lewis, a climate scientist and accredited ‘expert reviewer’ for the IPCC, also points out that Met Office’s flagship climate model suggests the world will warm by twice as much in response to CO2 as some other leading institutes, such as Nasa’s climate centre in America.

The Met Office model’s current value for the ‘equilibrium climate sensitivity’ (ECS) – how much hotter the world will get each time CO2 doubles – is 4.6C. This is above the IPCC’s own ‘likely’ range and the 95 per cent certainty’ level established by recent peer-reviewed research.

Lewis’s paper is scathing about the ‘future warming’ document issued by the Met Office in July, which purported to explain why the current 16-year global warming ‘pause’ is unimportant, and does not mean the ECS is lower than previously thought.

Lewis says the document made misleading claims about other scientists’ work – for example, misrepresenting important details of a study by a team that included Lewis and 14 other IPCC experts. The team’s paper, published in the prestigious journal Nature Geoscience in May, said the best estimate of the ECS was 2C or less – well under half the Met Office estimate.

He also gives evidence that another key Met Office model is inherently skewed. The result is that it will always produce high values for CO2-induced warming, no matter how its control knobs are tweaked, because its computation of the cooling effect of smoke and dust pollution – what scientists call ‘aerosol forcing’ – is simply incompatible with the real world.

This has serious implications, because the Met Office’s HadCM3 model is used to determine the Government’s climate projections, which influence policy.

Mr Lewis concludes that the Met Office modelling is ‘fundamentally unsatisfactory, because it effectively rules out from the start the possibility that both aerosol forcing and climate sensitivity are modest’. Yet this, he writes, ‘is the combination that recent observations support’.

The Met Office said it would examine the paper and respond in due course.

‘Children of MoS reporter should murder him’: vile abuse on Guardian site

The Mail on Sunday’s report last week that Arctic ice has had a massive rebound this year from its 2012 record low was followed up around the world – and recorded 174,200 Facebook ‘shares’, by some distance a record for an article on the MailOnline website.

But the article and its author also became the object of extraordinarily vitriolic attacks from climate commentators who refuse to accept any evidence that may unsettle their view of the science.

A Guardian website article claimed our report was ‘delusional’ because it ignored what it called an ‘Arctic death spiral’ caused by global warming.

Beneath this, some readers who made comments had their posts removed by the site moderator, because they ‘didn’t abide by our community standards’.

But among those that still remain on the site is one which likens the work of David Rose – who is Jewish – to Adolf Hitler’s anti-Semitic rant Mein Kampf.

Another suggests it would be reasonable if he were to be murdered by his own children. A comment under the name DavidFTA read: ‘In a few years, self-defence is going to be made a valid defence for parricide [killing one’s own father], so Rose’s children will have this article to present in their defence at the trial.’

Critics of the article entirely ignored its equally accurate statement that there is mounting evidence the Arctic sea ice retreat has in the past been cyclical: there were huge melts in the 1920s, followed by later advances.

Read more: http://www.dailymail.co.uk/news/arti...#ixzz2f1PK8fsO
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