Alan Robock, May 19, 2011,
Nature, Vol 473, pp 275-276
PDF file:
http://climate.envsci.rutgers.edu/pdf/NatureNuclearWinterComment.pdf Nuclear winter is a real and present danger
Models show that even a ‘small’ nuclear war would cause catastrophic climate change. Such findings must inform policy, says Alan Robock.
In the 1980s, discussion and debate about the possibility of a ‘nuclear winter’ helped to end the arms race between the United States and the Soviet Union. As former Soviet president Mikhail Gorbachev said in an interview in 2000: “Models made by Russian and American scientists showed that a nuclear war would result in a nuclear winter that would be extremely destructive to all life on Earth; the knowledge of that was a great stimulus to us, to people of honour and morality, to act.”
As a result, the number of nuclear weapons in the world started to fall, from a peak of about 70,000 in the 1980s to a total of about 22,000 today. In another five years that number could go as low as 5,000, thanks to the New Strategic Arms Reduction Treaty (New START) between the United States and Russia, signed on 8 April 2010.
Yet the environmental threat of nuclear war has not gone away. The world faces the prospect of a smaller, but still catastrophic, nuclear conflict. There are now nine nuclear-weapons states. Use of a fraction of the global nuclear arsenal by anyone, from the superpowers to India versus Pakistan, still presents the largest potential environmental danger to the planet by humans.
That threat is being ignored. One reason for this denial is that the prospect of a nuclear war is so horrific on so many levels that most people simply look away. Two further reasons are myths that persist among the general public: that the nuclear winter theory has been disproved, and that nuclear winter is no longer a threat. These myths need to be debunked.
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