Tree ring dating and climate change

15-Mar-2020 21:56 by 10 Comments

Tree ring dating and climate change

‘I am certain that the science is rock solid.’ He admitted that his CRU colleagues had sometimes used ‘injudicious phrases’, but that was because they kept on being ‘diverted’ from their work by those who wished to scrutinise it.‘It’s understandable that sometimes people get frustrated,’ he said. Roger Pielke, Professor of Environmental Studies at the University of Colorado, could in no sense be described as a climate change sceptic, let alone a ‘denier’.

This, he lamented, ‘dilutes the message rather significantly’.Keith Briffa from the University of East Anglia’s Climatic Research Unit (CRU), which plays a key role in forming IPCC assessments, urged caution, warning that when it came to historical climate records, there was no new data, only the ‘same old evidence’ that had been around for years.It is only now that their concerns have started to emerge from the thousands of pages of ‘Warmergate’ emails leaked last month from the CRU’s computers, along with references to performing a ‘trick’ to ‘hide’ temperature decline and instructions to resist all efforts by the CRU’s critics to use the Freedom of Information Act to check the unit’s data and conclusions. ‘In the long term, it will make very little difference to the scientific consensus, and to the way politicians respond to it,’ Professor Trevor Davies, the university’s Pro-Vice Chancellor and a former CRU director, told me.Critics such as Mc Intyre had been ‘after the CRU station data for years.If they ever hear there is a Freedom of Information Act now in the UK, I think I’ll delete the file rather than send to anyone’.Gabriel Fahrenheit did not invent the mercury thermometer until 1724, so scientists who want to reconstruct earlier climate history have to use ‘proxy data’ - measurements derived from records such as ice cores, tree-rings and growing season dates.

For example, some suggest that the ‘medieval warm period’, the 350-year era that started around 1000, when red wine grapes flourished in southern England and the Vikings tilled now-frozen farms in Greenland, was considerably warmer than even 1998.He and other ‘global warmists’ often insist that when it comes to the IPCC’s main conclusions - that the Earth is in a period of potentially catastrophic warming and that the main culprit is man-made greenhouse gas emission - no serious scientist dissents from the conventional view.In fact, there is a large body of highly-respected academic experts who fiercely contest this thesis: people such as Richard Lindzen, Professor of Meteorology at the Massachusetts Institute of Technology and a disillusioned former IPCC member, and Dr Tom Segalstad, head of geology at Oslo University, who has stated that ‘most leading geologists throughout the world know that the IPCC’s view of Earth processes are implausible if not impossible’.Under his leadership, it gained an international reputation for authoritative and ground-breaking research.Last night, Norman Lamb, MP for North Norfolk, said: ‘My father was always very concerned that the highest possible standards were met.In the course of an extraordinary BBC interview in which he called an American critic an ‘****hole’ live on air, Jones’s colleague Professor Andrew Watson insisted that the fuss was completely unjustified, because all Jones had been talking about was ‘tweaking a diagram’.

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