“…New research […] shows that a major ice age was narrowly missed just before the industrial revolution , probably because the development of agriculture had nudged the amount of carbon dioxide in the atmosphere just above the tipping point.
“The bottom line is we are basically skipping a whole glacial cycle, which is unprecedented,” said Andrey Ganopolski, at the Potsdam Institute for Climate Impact Research (PIK) in Germany and who led the research. “It is mind-boggling that humankind is able to interfere with a mechanism that shaped the world as we know it.”
“Like no other force on the planet, ice ages have shaped the global environment and thereby determined the development of human civilisation,” Schellnhuber said. “Now human interference is acting as a huge geological force, so this is a defining paper for the Anthropocene idea.” If carbon emissions are not restricted, he said, they could end the million-year-long period of ice age cycles altogether.
Michel Crucifix, at the Université catholique de Louvain in Belgium and not involved in the new research, said: “It reinforces previous assessments asserting that humanity’s collective footprint on Earth already extends beyond any imaginable future of our society.”
“Such long-term consequences may seem surprising, given that the emissions will occur over a few centuries at most,” he said. “In fact, the mean half-life of CO2 in the atmosphere is of the order of 35,000 years. Consequently, anthropogenic CO2 will still be in the atmosphere in 50,000 years’ time, and even 100,000 years, which is enough to prevent any glaciation.”
Text: Damian Carrington, Fossil fuel burning ‘postponing next ice age’, Guardian Australia.