This is a big deal politically.
A study funded by the Koch brothers, and led by a global warming skeptic, has confirmed that the planet is warming rapidly and it's because of greenhouse gases emitted by humans.
CALL me a converted skeptic. Three years ago I identified problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming. Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct. I’m now going a step further: Humans are almost entirely the cause.
Our results show that the average temperature of the earth’s land has risen by two and a half degrees Fahrenheit over the past 250 years, including an increase of one and a half degrees over the most recent 50 years. Moreover, it appears likely that essentially all of this increase results from the human emission of greenhouse gases.
These findings are stronger than those of the Intergovernmental Panel on Climate Change, the United Nations group that defines the scientific and diplomatic consensus on global warming.
This study isn't important scientifically, because it simply confirms what already has been known by climatologists who haven't drunk the oil industry-funded disinformation happy juice. Everything is fine; no problem; keep on using fossil fuels all you want.
Basically the game is over for global warming deniers.
There's little room for them to play their anti-scientific games when as noted a skeptic as physicist Richard Muller admits that he's been wrong. Kudos to Muller for putting science above his skepticism.
The Guardian has a story about the study, which will be formally released next week. Excerpts:
The Earth's land has warmed by 1.5C over the past 250 years and "humans are almost entirely the cause", according to a scientific study set up to address climate change sceptics' concerns about whether human-induced global warming is occurring.
Prof Richard Muller, a physicist and climate change sceptic who founded the Berkeley Earth Surface Temperature (Best) project, said he was surprised by the findings. "We were not expecting this, but as scientists, it is our duty to let the evidence change our minds." He added that he now considers himself a "converted sceptic" and his views had undergone a "total turnaround" in a short space of time.
...Muller said his team's analysis suggested there would be 1.5 degrees of warming over land in the next 50 years, but if China continues its rapid economic growth and its vast use of coal then that same warming could take place in less than 20 years.
"Science is that narrow realm of knowledge that, in principle, is universally accepted," wrote Muller. "I embarked on this analysis to answer questions that, to my mind, had not been answered. I hope that the Berkeley Earth analysis will help settle the scientific debate regarding global warming and its human causes. Then comes the difficult part: agreeing across the political and diplomatic spectrum about what can and should be done."