Encyclopedia of Snow, Ice and Glaciers - Google Books

http://books.google.de/books?id=mKKtQR4T-1MC

The earth’s cryosphere, which includes snow, glaciers, ice caps, ice sheets, ice shelves, sea ice, river and lake ice, and permafrost, contains about 75% of the earth’s fresh water. It exists at almost all latitudes, from the tropics to the poles, and…