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Emails and documents illegally obtained from servers at the University of East Anglia Climate Research Unit have been uploaded on a climate ‘sceptics’ blog. It is claimed they show evidence of scientists’ collusion to manipulate data in making the case for human-made climate change.
Dr Chris Huntingford, Centre for Ecology and Hydrology (CEH), said:
“Using the very comprehensive set of temperature measurements available to us, we do know that there has been significant warming over the last hundred years. These datasets have been compiled by independent research laboratories in both the UK and the USA.
“Computer model descriptions of the climate system are increasing in their predictive skill, and there are now very good reasons to believe that their output is accurate and can be trusted. These simulations provide compelling evidence of the link between global warming and increases in atmospheric carbon dioxide due to the burning of fossil fuels.
“Such state-of-the-art computer models of how the climate functions do also account for natural cycles in the Earth system. However, when the additional influence of humans is not considered, they are unable to explain the rapid rate of warming that has been observed over the last Century. The implication is that to a very high level of certainty, the warming observed in the last Century is not part of a natural cycle.
“Almost all current scientific understanding of how the climate system operates suggests that humankind is having an influence on our climate system.”
Prof John Burrows, Director of the Biogeochemistry Programme, Centre for Ecology & Hydrology (CEH), said:
“The peer review scientific process was created to try to avoid conspiracies from any side on an issue. Despite the adverse reaction in some quarters the current discussion is a perfect example that whilst it doesn’t always look perfect, an open debate, backed up by peer review, is what science is all about.
“Whilst not ignoring “emailgate” we should not inadvertently move the public attention from the established scientific consensus to the attempt at character assassination being made by these climate change sceptics.
“The basic physics of global climate change has been known since Arrhenius at the end of the 19th century if not before. The four Assessment Reports from the IPCC are consistent, however, the data since 1990 seems to follow worst case scenarios. To me this is evidence that the scientific community is behaving responsibly and rather cautiously with respect to the science of climate change.”
Prof Piers Forster, School of Earth and Environment, University of Leeds, said:
“Scientists at the Climate Research Unit are leading experts in the world’s temperature record. They do an amazingly hard job of collecting data from lots of counties, looking at errors and putting the different datasets together. They have been under increasing pressure from a few individuals to respond to multiple FOI calls. Like all us scientists they are short of man-power and stretch their resources to the maximum to do as much new science as possible. The need to respond to FOI requests are often too large to make them feasibly achievable and whilst some of the emails show scientists to be all too human, nothing I have read makes me doubt the veracity of the peer review process or the general warming trend in the global temperature record. I know that when errors in their global temperature product have previously been found (e.g. Thomson et al., 2008, Nature), they responded as all scientists should, researching the source of the error with true scientific enthusiasm.”
Dr Stephan Harrison, Associate Professor in Quaternary Science, School of Geography, University of Exeter, said:
“The emails from the Climatic Research Unit which have been published on the internet have been seized upon by climate change sceptics as evidence that scientists are involved in a global warming conspiracy, suppression of dissenting voices and making data up to support a global warming agenda. We shouldn’t get too carried away, however. Irrespective of what may or may not have been said in some private emails, this doesn’t change the physical properties of carbon dioxide, and doesn’t change the fact that human activity is warming the planet. There’s a lot of politics in all of this debate, but it is the science that has to drive policy.”
Kathy Maskell, Spokesperson, & Prof Rowan Sutton, Walker Institute, University of Reading, said:
“Throughout the Earth’s history there have been natural changes in climate caused by many factors, including variations in the Earth’s orbit around the Sun, volcanic eruptions, and changes in greenhouse gas concentrations. The scientific evidence now shows that people are changing the global climate.
“Climate scientists look at both natural factors that cause climate to change and they look at the effect that people are having on climate. There is no doubt that human activity, such as burning fossil fuels and agriculture, is increasing greenhouse gases in the atmosphere. This increase in greenhouse gases is causing the globe to warm.
“The current warmth is unusual in the context of the last 1000 years (at least) and is not just part of a natural cycle. Past changes are also thought to have occurred much more slowly than the warming over the 20th century.
“The majority of scientists agree that much of the warming since the mid-20th century is very likely due to increasing greenhouse gases being produced by human activity. Scientists have looked at different possible causes for the warming. Natural changes (like changes in the Sun’s output) cannot explain 20th century warming. The only way to reproduce the warming over the 20th century is to include the effects that people are having on the climate.
“Over the 20th century as a whole there has been a warming trend of 0.7 degrees centigrade and the warming has accelerated since the mid-20th century. The warming has not been steady and there have been periods of cooling. This is exactly what climate scientists would expect. As well as increasing greenhouse gases, natural factors (such as volcanic eruptions and changes in sea surface temeprature in the Pacific called El Nino) are also affecting global temperature. So scientists would expect there to be short periods where there is less warming and even cooling, but overall the trend is towards higher global temperatures.”
Bob Ward, policy and communications director at the Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science, said:
“Once appropriate action has been taken over the hacking, there has to be some process to assess the substance of the e-mail messages as well. The selective disclosure and dissemination of the messages has created the impression of impropriety, and the only way of clearing the air now would be through a rigorous investigation. I have sympathy for the climate researchers at the University of East Anglia and other institutions who have been the target of an aggressive campaign by so-called ‘sceptics’ over a number of years. But I fear that only a thorough investigation could now clear their names.
“There needs to be an assurance that these e-mail messages have not revealed inappropriate conduct in the preparation of journal articles and in dealing with requests from other researchers for access to data. This will probably require investigations both by the host institutions and by the relevant journals. There may also be a role for the UK Office of Research Integrity to advise on any investigation.
“The e-mail messages I have seen posted on ‘sceptics’’ websites do not cast doubt on the basic physical fact that the Earth is warming in response to rising concentrations of greenhouse gases in the atmosphere. ‘Sceptics’ may seek to wrongly portray these e-mail messages as a smoking gun from a worldwide conspiracy to create a global warming hoax, but that is simply a ridiculous fantasy.”
Dr Andy Challinor, lecturer in Climate Change Modelling, University of Leeds, said:
“Scientists are frequently faced with choices about methods of presenting data. The aim is to represent the underlying facts clearly, and there is rarely a single correct way of doing this. The mechanisms for anthropogenic climate change are established science that is well-understood. The idea that the many scientists across the globe working on climate change could collude in misrepresenting the fundamentals of the science is ludicrous, since it would be both counter-cultural to science and logistically impossible.”
Dr Shaun Fitzgerald, Industrial Fellow, University of Cambridge BP Institute, said:
“The evidence base for climate change continues to be debated. However, what is disappointing is that there is less debate about what we should be doing morally regardless of the strength of the case for or against climate change being driven by mankind. Even if some people want to dismiss the evidence base, what do they think we should do as responsible citizens? Clearly we should be seeking ways of reducing our impact on the planet – this is irrefutable. Improving energy efficiency and switching to non/low-carbon energy sources are vital. In the case of improved energy efficiency, there are strong economic arguments today as to why this should be done now. In the case of switching to non/low carbon energy sources, the economic arguments are longer-term and may involve consideration of the cost of climate change as per the Stern report. In summary, I fail to understand why people want to debate the evidence base for climate change rather than debate what we should be doing anyway to reduce our impact on the planet. The technological advances in energy efficiency need to be adopted by more people, and more quickly, before we invest more time debating climate change!”