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Director of Hatcheries and Conditioning
http://news.bbc.co.uk/2/hi/science/nature/5109188.stm
The Earth was hotter in the late 20th Century than it had been in the last 400 or possibly 1,000 years, a report requested by the US Congress concludes.
It backs some of the key findings of the original study that gave rise to the iconic "hockey stick" graph.
The diagram, which shows a sharp upturn in temperatures in recent decades, has been a prime target for groups who doubt humans are warming the planet.
These sceptics had challenged the way the hockey stick data was assembled.
They argued it had been massaged to produce the distinctive shape.
The fall-out culminated in one US politician demanding to see financial and research records from the three scientists who had put the data together: Michael Mann, Raymond Bradley, and Malcolm Hughes (sometimes referred to simply as MBH).
'Plausible' assessment
The new report, carried out by a panel of the US-based National Research Council (NRC), largely vindicates the researchers' work, first published in 1998.
The report says it has very high confidence that the last few decades of the 20th Century were warmer than any comparable period in the last 400 years.