As the final freezing hours of 2008 fade into history, this would seem to be a good time to look back at the year and also at the short history of Harmless Sky, which is now just over a year old.The first rather tentative pages went live on 17^th December 2007.It would be tedious to rehearse all that has happened, so I am going to focus on just one topic which encapsulates much of what this blog is about and highlights issues that are now at the heart of the climate debate.At the beginning of the year I came across two articles published by the New Statesman, which had generated a huge number of comments on their website. The first was by Dr David Whitehouse, an astrophysicist who was the BBC’s Science Correspondent from 1988-98 and then science editor of BBC News Online from 1998-2006. During this period he must have been ideally placed to see how concern about global warming grew from being the preoccupation of a few scientists and environmental activists into a new scientific and moral orthodoxy. His article was provocatively entitled, ‘Has Global Warming Stopped?’

After describing the anthropogenic global warming hypothesis, Dr Whitehouse pointed out that although CO₂ levels have continued to rise during this century, temperatures have failed to do so. He then explored a weakness in the hypothesis, demonstrating that, although it can explain the warming of the last decades of the twentieth century very well, it cannot explain why temperatures have levelled off, and then fallen, without a commensurate decline in CO₂ levels. Dr Whitehouse did not in any way suggest that the hypothesis was bad science, but merely probed the way in which it relates to recent temperature trends that are quite unexpected. He also suggested that this flaw in the hypothesis might indicate that there are natural influences on global temperature of which we are still unaware, and questions whether our understanding of the climate is adequate to draw firm conclusions about what is happening.

So we are led to the conclusion that either the hypothesis of carbon dioxide induced global warming holds but its effects are being modified in what seems to be an improbable though not impossible way, or, and this really is heresy according to some, the working hypothesis does not stand the test of data.

It is the use of the term heresy that puts this thoughtful, cautious and scrupulously argued article in context. The Environment Columnist of the New Statesman is Mark Lynas, one of the high priests of global warming alarmism, and that venerable publication’s editorial policy on climate change is set accordingly.

A month later, a furious and somewhat hysterical response from Mark Lynas appeared. It started like this: Continue reading »