When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...
On Friday, 17 October 2014 from 8:00 a.m. to 5:00 p.m. (USA Mountain Time), our Web site and FTP services will be unavailable because of system maintenance. We apologize for any inconvenience this may cause you.
a hard snow surface lying upon a softer layer; may be formed by sun, rain or wind, and is described as breakable crust or unbreakable crust, depending upon wether it will break under the weight of a turning skier.