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A snow cornice or simply cornice (from the Italian cornice meaning "ledge") is an overhanging edge of
"Cornice" from the Avalanche Encyclopedia
* ttps://www.cbc.ca/news/canada/british-columbia/lions-bay-search-resumes-hikers-found-and-recovered-1.4062976 {{"'A great tragedy:' Bodies of 5 missing hikers recovered near Lions Bay, B.C." Aeolian landforms Mountaineering Snow
A snow cornice or simply cornice (from the Italian cornice meaning "ledge") is an overhanging edge of snow
Snow comprises individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes.
It consists of frozen crystalline water throughout ...
on a ridge or the crest of a mountain
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually highe ...
and along the sides of gullies
A gully is a landform created by running water, mass movement, or commonly a combination of both eroding sharply into soil or other relatively erodible material, typically on a hillside or in river floodplains or terraces. Gullies resemble lar ...
.
Formation
A snow cornice forms by wind blowingsnow
Snow comprises individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes.
It consists of frozen crystalline water throughout ...
over sharp terrain breaks (e.g. the crest of the mountain) where it attaches and builds out horizontally. This build-up is most common on the steeper and leeward sides of mountains. Cornices are extremely dangerous and travelling above or below them should be avoided.
When a cornice ''collapses'', it breaks in from the cornice to the top of the peak; even being on the snow on top of rock exposes the alpinist to hazard in this situation. The best practice in mountaineering is to stay far enough back from the edge so as not to be able to see the drop, as an approximate metric of exposure. Interview und Bilder zum Unglück
In avalanche
An avalanche is a rapid flow of snow down a slope, such as a hill or mountain.
Avalanches can be set off spontaneously, by such factors as increased precipitation or snowpack weakening, or by external means such as humans, animals, and eart ...
safety, cornices are a high avalanche danger as they often break and trigger larger avalanches that permeate several snow layers. Cornices are particularly vulnerable to collapse during periods of high solar irradiance.
Gallery
See also
*List of climbing topics
This is an index of topics related to climbing.
A
Abseil
- Acetazolamide
- '' Action Directe''
- Altitude sickness (also known as: ''Acute mountain sickness'' (AMS))
- Aid climbing
- Aider
- Alcove (climbing)
- knot
- Alpine hut
- Alpine style
...
* Sastrugi
Sastrugi, or zastrugi, are features formed by erosion of snow by wind.
They are found in polar regions, and in snowy, wind-swept areas of temperate regions, such as frozen lakes or mountain ridges.
Sastrugi are distinguished by upwind-facing poi ...
References
External links
"Cornice" from the Avalanche Encyclopedia
* ttps://www.cbc.ca/news/canada/british-columbia/lions-bay-search-resumes-hikers-found-and-recovered-1.4062976 {{"'A great tragedy:' Bodies of 5 missing hikers recovered near Lions Bay, B.C." Aeolian landforms Mountaineering Snow