Global warming scientists finally admit that their computer models exaggerate the amount of global warming
I’ve always suspected that the computer models that scientists use to predict global warming were programmed to exaggerate the amount of global warming.
And now, the scientists who write these computer programs have finally admitted that that is indeed the case.
The Telegraph reports:
Top climate scientists admit global warming forecasts were wrong
Top climate scientists have admitted that their global warming forecasts are wrong and world is not heating at the rate they claimed it was in a key report.
One of the central issues is believed to be why the IPCC failed to account for the “pause” in global warming, which they admit that they did not predict in their computer models. Since 1997, world average temperatures have not shown any statistically significant increase.
The summary also shows that scientist have now discovered that between 950 and 1250 AD, before the Industrial Revolution, parts of the world were as warm for decades at a time as they are now.
Despite a 2012 draft stating that the world is at it’s warmest for 1,300 years, the latest document states: “’Surface temperature reconstructions show multi-decadal intervals during the Medieval Climate Anomaly (950-1250) that were in some regions as warm as in the late 20th Century.”
The 2007 report included predictions of a decline in Antarctic sea ice, but the latest document does not explain why this year it is at a record high.
The 2013 report states: “’Most models simulate a small decreasing trend in Antarctic sea ice extent, in contrast to the small increasing trend in observations…”
The Daily Mail reports:
World’s top climate scientists confess: Global warming is just QUARTER what we thought – and computers got the effects of greenhouse gases wrong
Leaked report reveals the world has warmed at quarter the rate claimed by IPCC in 2007
Scientists accept their computers may have exaggerated
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.
Yet the leaked report makes the extraordinary concession that over the past 15 years, recorded world temperatures have increased at only a quarter of the rate of IPCC claimed when it published its last assessment in 2007.
Back then, it said observed warming over the 15 years from 1990-2005 had taken place at a rate of 0.2C per decade, and it predicted this would continue for the following 20 years, on the basis of forecasts made by computer climate models.
But the new report says the observed warming over the more recent 15 years to 2012 was just 0.05C per decade – below almost all computer predictions.
They 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.
They 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.
The 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.
A 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.
Scientists accept their computers may have exaggerated