The committee would like to express its appreciation to the many people who contributed to this report. In particular, we would like to thank the participants of the two workshops held as part of this study, especially those who gave keynote presentations at the Workshop on Abrupt Climate Change: William Ascher, David Bradford, Grant Branstator, Tony Broccoli, Wallace Broecker, Mark Cane, Bob Dickson, Isaac Held, Sylvie Joussaume, John Kutzbach, Jean Lynch-Stieglitz, Peter Schlosser, Jeff Severinghaus, Karen Smoyer, and Gary Yohe. These talks helped set the stage for fruitful discussions in the breakout sessions that followed. The steering committee is also grateful to Doug Martinson for stepping in at the last minute to lead one of the breakout discussions. In addition, the committee is grateful to the participants of the Workshop on the Economic and Ecological Impacts of Abrupt Climate Change for their insights and written reports, parts of which have been incorporated into this report: Craig Allen, Edward Cook, Peter Daszak, Mark Dyurgerov, David Inouye, Klaus Keller, George Kling, Walter Koenig, Carl Leopold, Thomas Lowell, Robert Mendelsohn, John Reilly, Joel Smith, Thomas Swetnam, Richard Tol, Ferenc Toth, Harvey Weiss, John Weyant, and Gary Yohe. The committee is also grateful to a number of people who provided important discussion and/or material for this report, including Vic Baker, Katherine Hirschboeck, and James Knox.

The committee would like to acknowledge the generous financial sup-