Hiding the decline part two: Long-suppressed tree ring data discovered by Stephen McIntyre shows 11th century A.D. temperature to be much higher than in the 20th

Medieval Warm Period for the win.

 

Former environmental activist takes aim at anthropogenic global warming

AGW gets a dressing down from Greenpeace co-founder Patrick Moore, Ph.D. in ecology, of Rainbow Warrior fame, here:

"[T]he Earth has been warming very gradually for 300 years, since the Little Ice Age ended, long before heavy use of fossil fuels. Prior to the Little Ice Age, during the Medieval Warm Period, Vikings colonized Greenland and Newfoundland, when it was warmer there than today. And during Roman times, it was warmer, long before fossil fuels revolutionized civilization.

"The idea it would be catastrophic if carbon dioxide were to increase and average global temperature were to rise a few degrees is preposterous. ...

"Over the past 150 million years, carbon dioxide had been drawn down steadily (by plants) from about 3,000 parts per million to about 280 parts per million before the Industrial Revolution. If this trend continued, the carbon dioxide level would have become too low to support life on Earth. Human fossil fuel use and clearing land for crops have boosted carbon dioxide from its lowest level in the history of the Earth back to 400 parts per million today.

"At 400 parts per million, all our food crops, forests, and natural ecosystems are still on a starvation diet for carbon dioxide. The optimum level of carbon dioxide for plant growth, given enough water and nutrients, is about 1,500 parts per million, nearly four times higher than today. Greenhouse growers inject carbon-dioxide to increase yields. Farms and forests will produce more if carbon-dioxide keeps rising.

"We have no proof increased carbon dioxide is responsible for the earth’s slight warming over the past 300 years. There has been no significant warming for 18 years while we have emitted 25 per cent of all the carbon dioxide ever emitted. Carbon dioxide is vital for life on Earth and plants would like more of it."

Can you find yourself on this temperature chart?

The modern warm period is at the right in red.

Our entire history as a species as preserved in the usual objects of historical inquiry occurred in a period much warmer than now, and it could all be coming to an end because of cooling, not warming.

Discussed here, but from an inferior chart.

German Lefty Fritz Vahrenholt Questions CO2 Climate Change Hypothesis

Interviewed here in Der Spiegel:

"Today, I want new scientific findings to be included in the climate debate. It would then become clear that the simple equation that CO2 and other man-made greenhouse gases are almost exclusively responsible for climate change is unsustainable. It hasn't gotten any warmer on this planet in almost 14 years, despite continued increases in CO2 emissions. Established climate science has to come up with an answer to that. ...

"The long version of the IPCC report does mention natural causes of climate change, like the sun and oscillating ocean currents. But they no longer appear in the summary for politicians. They were simply edited out. To this day, many decision-makers don't know that new studies have seriously questioned the dominance of CO2. CO2 alone will never cause a warming of more than 2 degrees Celsius (3.6 degrees Fahrenheit) by the end of the century. Only with the help of supposed amplification effects, especially water vapor, do the computers arrive at a drastic temperature increase. I say that global warming will remain below two degrees by the end of the century. This is an eminently political message, but it's also good news. ...

"In terms of the climate, we have seen a cyclical up and down for the last 7,000 years, long before man began emitting CO2 into the atmosphere. There has been a warming phase every 1,000 years, including the Roman, the Medieval and the current warm periods. All of these warm periods consistently coincided with strong solar activity. In addition to this large fluctuation in activity, there is also a 210-year and an 87-year natural cycle of the sun. Ignoring these would be a serious mistake …

"In the second half of the 20th century, the sun was more active than it had been in more than 2,000 years. This "large solar maximum," as astronomers call it, has contributed at least as much to global warming as the greenhouse gas CO2. But the sun has been getting weaker since 2005, and it will continue to do so in the next few decades. Consequently, we can only expect cooling from the sun for now. ...

"Many scientists assume that the temperature changes by more than 1 degree Celsius for the 1,000-year cycle and by up to 0.7 degrees Celsius for the smaller cycles. Climatologists should be putting a far greater effort into finding ways to more accurately determine the effects of the sun on climate. For the IPCC and the politicians it influences, CO2 is practically the only factor. The importance of the sun for the climate is systematically underestimated, and the importance of CO2 is systematically overestimated. As a result, all climate predictions are based on the wrong underlying facts. ...

"[T]he declining solar activity, as well as the fluctuations in ocean currents, such as the 60-year Pacific oscillation, which was in a positive warm phase from 1977 to 2000 and, since 2000, has led to cooling as a result of its decline. Their contribution to the change in temperature has also been wrongly attributed to CO2. Most of all, however, the last sunspot cycle was weaker than the one before it. This is why the sun's magnetic field has continued to weaken since 2000. As a result, this magnetic field doesn't shield us against cosmic radiation quite as well, which in turn leads to stronger cloud formation and, therefore, cooling. What else has to happen before the IPCC at least mentions these relationships in its reports? ...

"In addition to carbon dioxide, we also have black soot, for example. It creates 55 percent of the warming effect of CO2, but it could be filtered out with little effort within a few years, especially in emerging and developing countries. And, in doing so, we would achieve huge benefits for human health. ...

"All I'm saying is that CO2 is a climate gas, but that its effect is only half as strong as the IPCC claims. ..."

Professor Phil Jones Retreats on Climate Change

An op-ed from The UK Daily Mail:

The professor’s amazing climate change retreat

13th February 2010

Data: Professor Phil Jones admitted his record keeping is 'not as good as it should be'

Untold billions of pounds have been spent on turning the world green and also on financing the dubious trade in carbon credits.

Countless gallons of aviation fuel have been consumed carrying experts, lobbyists and politicians to apocalyptic conferences on global warming.

Every government on Earth has changed its policy, hundreds of academic institutions, entire school curricula and the priorities of broadcasters and newspapers all over the world have been altered – all to serve the new doctrine that man is overheating the planet and must undertake heroic and costly changes to save the world from drowning as the icecaps melt.

You might have thought that all this was based upon well-founded, highly competent research and that those involved had good reason for their blazing, hot-eyed certainty and their fierce intolerance of dissent.

But, thanks to the row over leaked emails from the Climatic Research Unit, we now learn that this body’s director, Phil Jones, works in a disorganised fashion amid chaos and mess.

Interviewed by the highly sympathetic BBC, which still insists on describing the leaked emails as ‘stolen’, Professor Jones has conceded that he ‘did not do a thorough job’ of keeping track of his own records.

His colleagues recall that his office was ‘often surrounded by jumbled piles of papers’.

Even more strikingly, he also sounds much less ebullient about the basic theory, admitting that there is little difference between global warming rates in the Nineties and in two previous periods since 1860 and accepting that from 1995 to now there has been no statistically significant warming.

He also leaves open the possibility, long resisted by climate change activists, that the ‘Medieval Warm Period’ from 800 to 1300 AD, and thought by many experts to be warmer than the present period, could have encompassed the entire globe.

This is an amazing retreat, since if it was both global and warmer, the green movement’s argument that our current position is ‘unprecedented’ would collapse.

It is quite reasonable to suggest that human activity may have had some effect on climate.

There is no doubt that careless and greedy exploitation has done much damage to the planet.

But in the light of the ‘Climategate’ revelations, it is time for governments, academics and their media cheerleaders to be more modest in their claims and to treat sceptics with far more courtesy.

The question is not settled.