Professor Ollier takes on James Hansen’s claim that the Greenland and Antarctic ice sheets are in danger of collapse due to global warming. Hansen’s claims are the basis for Al Gore’s suggestion, in An Inconventient Truth, that the seas may rise by 20 feet in the near future.
Professor Ollier argues that, “Hansen’s seeming ignorance of the mechanism by which glaciers flow leads him into major errors.”
You may have seen Professor Cliff Ollier’s write up of glacier dynamics originally circulated by Benny Peiser’s excellent CCNet newsletter. The Center for Science & Public Policy has published a paper adapted from the original article with expanatory footnotes and diagram added to clarify some of the more technical parts of the article.
This paper describes glacier dynamics, such as the glacier budget, how glaciers flow (through a process known as “creep”), how creep is related to temperature and stress, and how the simple rules of creep allow us to understnad some observations of glaciers.
We hope you find this paper useful.
Center for Science & Public Policy
Frontiers of Freedom