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April 28, 2009
I've been listening with one ear to the bits and pieces of the responses in the media to Ian Plimer's Heaven and Earth on Counterpoint and Lateline. The text is one in which Pilmer challenges the accepted science of global warming, as his argument is within the tradition of those who argue that natural climate change. The process of natural climate change are outside of human hands and are unable to be manipulated by human efforts. The most we could do is adapt to the changes that are occurring.
The natural science argument is reasonable. The Earth is an evolving dynamic system. Current changes in climate, sea level and ice are within variability. Atmospheric CO2 is the lowest for 500 million years. Climate has always been driven by the Sun, the Earth’s orbit and plate tectonics and the oceans, atmosphere and life respond.I have no problems with that.
My problem is with Pilmer's inference from this ---global warming does not threaten the world because human activity does not cause global warming. The world does not face catastrophic climate change unless carbon emissions are drastically reduced, since there is no global warming as temperatures have been dropping since 1998.
Pilmer's claim that global temperatures have dropped since 1998, thus disproving a warming trend, is one that is contested by many of the world's climate scientists. The counter argument is that though temperatures have dropped a very small amount since 1998, both in surface temperatures and in atmospheric temperatures measured from satellites. However, that doesn't mean that global warming has stopped , since The temperatures, if we average from 1998 to 2008, are warmer than the previous 10 years, or the 10 years before that, or any 10-year period over at least the last 150 years.
That issue will be resolved by the normal procedures of science in terms of theory, evidence and modelling.
PIlmer's second argument is quite different as it steps outside natural science. He argues that climate change politics is religious fundamentalism masquerading as science. It's triumph is computer models unrelated to observations in nature and there has been no critical due diligence of the science of climate change. Moreover, dogma dominates, sceptics are pilloried and 17th Century thinking promotes prophets of doom, guilt and penance. Scientists are part of a new religious-like dogma that closes down debate.
I find this equation of normal science with the dogma of religious fundamentalism masquerading as science as crazy stuff. Though I suspect that it derives from Pilmer's adherence to Popper's philosophy of science, Popper's his equation of Freudism and Marxism as nonscience, and his defence of the open society, Pilmer's claim of totalitarianism still makes no sense to me. My eyes glaze over when I read it given that our cultural history has been characterised by the conflict between science vs. fundamentalist religion since Galileo. Is “climate-change fundamentalism” a little poetic license on Pilmer's part, in which senior scientists are likened to the priesthood, Nobel laureates are likened to doctrinal authorities and that science has sacred texts, cience "has rites and rituals? Or does Pilmer understand fundamentalism as “a movement or attitude stressing strict and literal adherence to a set of basic principles.”
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The National Farmers' Federation has thrown its backing behind controversial climate change dissenter, Professor Ian Plimer, whose new book aims to debunk the theories and dire predictions of some within the scientific fraternity.
Conforms my suspicions. That is why the drought is the explanation for no water in the Murray River.