Thursday 29 October 2009
Dr Bob Bradnock, Senior Visiting Fellow at Kings College London, gave a seminar on 14 October entitled “Climatic Change: A Threat to the Future?”. He began by disappointingly stating he was not really an expert on climate change, but then disarmingly pointed out that, such was the complexity of the subject and the range of disciplines needed to be fully expert, no one else was either.
He said that the climate has been changing throughout history and we can only be uncertain of the likely changes in the future. Our present interglacial warm period is just that, unusually warm, and the climate panic of thirty or forty years ago was about the earth becoming much colder. Rising CO2 levels do serve to increase global temperatures, but the dominant factor, solar radiation, is itself unpredictable. The earth’s orbit may be affecting climate over millennia.
Although the ‘average’ global temperature appears to have risen between the 1970s and 1990s, there has been no rise in the last decade, despite the continuing rises in CO2 in the atmosphere. Many other mechanisms, including the effect of the oceans and the clouds and the unknown positive and negative feedbacks in the system, mean that the level of certainty insisted on by the global warming / climate change consensus, with its talk of ‘climate change denial‘, is highly suspect.
In his discussion of whether warming might be raising sea levels, particularly in the Maldives and Bangladesh, Dr Bradnock mentioned that sea levels are actually 180 metres higher in South Africa than Sri Lanka. The land area of Bangladesh is growing, not falling; the shoreline in the Maldives appears to be going down relative to the land. Altogether, a lot to think about for both climate change proponents and opponents.
Report by Mr Malcolm Rees and the Web Team