Hot Debate Among Climate Scientists

Axel Bojanowski reports in Spiegel Online (28.7.2006) about a debate among climate researchers on the reliability and validity of the so called hockey stick graph. The diagram shows a significant increase in global average temperatures for the last thousand years. It's a cornerstone of for the global warming argument. Critics have pointed to the poor data the diagram is made of, but mostly have been put down by U.S. climate scientist Michael Mann who according to Bojanowski is a dominant figure in climate science. Mann testified at a hearing of the U.S. Congress. The hearing was about an evaluation report by the National Academy of Sciences commissioned by the Congress. This report gave Mann bad marks for scientific flaws. Note: None of the critics denies global warming and the human contribution. It's all about the scientific method and the dominance of one figure in the science circus. They just pay tribute to the simple fact the climate science is more complex than thought or than people, even scientists, believed.