Dr Nathaniel Bindoff wears a small badge that says, simply, "warming is unequivocal". One of his proudest memories of the fourth Intergovernmental Panel on Climate Change report in 2007 was working on that phrase, and grounding it in scientific certainty. This time around, he has gone one better. Dr Bindoff, a Tasmanian professor of oceanography, was co-ordinating lead author of the chapter of the latest report dealing with attribution of climate change. What it's really about is understanding the influence of humans on climate change," he said in Stockholm after the launch of the fifth IPCC report on the climate change science. ''We know the world has warmed 0.89 degrees since 1901, we know the oceans have warmed 0.1 degrees per decade for the last 50 years. But that doesn't tell you who did it," he said. Six years ago the previous report said it was ''very likely'' that more than half of the observed climate change was due to humans - but this time the language has toughened. It's now "extremely likely" that human influence has been the dominant cause of the observed warming in the atmosphere and the ocean, says the report. Read more: http://www.smh.com.au/environment/c...-to-sell-us-20130929-2umim.html#ixzz2gKecXS00
