Media Advisory: The Hockey Stick Controversy New Analysis Reproduces Graph of Late 20th Century Temperature RiseMay 11, 2005 BOULDER—Caspar Ammann, a paleoclimatologist at the National Center for Atmospheric Research (NCAR), is available to comment on the so-called hockey stick controversy discussed by Stephen McIntyre and Ross McKitrick today at the National Press Club in Washington, D.C. The hockey stick refers to the shape of a frequently cited graph of global mean temperature that shows a rapid rise between 1900 and 2000 after 900 years of relative stability. The graph first appeared in a research paper by Michael Mann, Raymond Bradley,...