Climate change emails between scientists reveal flaws in peer review

A close reading of the hacked emails exposes the real process of science, its jealousies and tribalism
Read more: doubts about "hockey stick" graph revealed

Fred Pearce guardian.co.uk, Tuesday 2 February 2010 18.27 GMT Article history


The coastline of Lake Baikal, Siberia, one of the areas where analysis of temperature change was severely disputed. Photograph: Olivier Renck/Getty Images/Aurora Creative

Scientists sometimes like to portray what they do as divorced from the everyday jealousies, rivalries and tribalism of human relationships. What makes science special is that data and results that can be replicated are what matters and the scientific truth will out in the end.

But a close reading of the emails hacked from the University of East Anglia in November exposes the real process of everyday science in lurid detail.

Many of the emails reveal strenuous efforts by the mainstream climate scientists to do what outside observers would regard as censoring their critics. And the correspondence raises awkward questions about the effectiveness of peer review – the supposed gold standard of scientific merit – and the operation of the UN's top climate body, the Intergovernmental Panel on Climate Change (IPCC).

The scientists involved disagree. They say they were engaged not in suppressing dissent but in upholding scientific standards by keeping bad science out of peer-reviewed journals. Either way, when passing judgment on papers that directly attack their own work, they were mired in conflicts of interest that would not be allowed in most professions.

The cornerstone of maintaining the quality of scientific papers is the peer review system. Under this, papers submitted to scientific journals are reviewed anonymously by experts in the field. Conducting reviews is seen as part of the job for academics, who are generally not paid for the work.

The papers are normally sent back to the authors for improvement and only published when the reviewers give their approval. But the system relies on trust, especially if editors send papers to ­reviewers whose own work is being criticised in the paper. It also relies on anonymity, so reviewers can give candid opinions.

Cracks in the system have been obvious for years. Yesterday it emerged that 14 leading researchers in a different field – stem cell research – have written an open letter to journal editors to highlight their dissatisfaction with the process. They allege that a small scientific clique is using peer review to block papers from other researchers...