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The Government of Canada’s terminology and linguistic data bank.
SUDDEN COLLAPSE [1 record]
Record 1 - internal organization data 2007-10-31
Record 1, English
Record 1, Subject field(s)
- Meteorological Forecasting, Data Measurement and Analysis
- Atmospheric, Climatic and Meteorological Phenomena
Record 1, Main entry term, English
- drop
1, record 1, English, drop
correct, officially approved
Record 1, Abbreviations, English
Record 1, Synonyms, English
- sudden collapse 2, record 1, English, sudden%20collapse
correct, officially approved
- SC 3, record 1, English, SC
correct
- SC 3, record 1, English, SC
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
At 64%, sudden collapses are most common fracture character for weak layers that produced whumpfs (fracture propagation in a weak layer, usually on low angle terrain). 4, record 1, English, - drop
Record number: 1, Textual support number: 2 CONT
About 15 years ago, some staff at Canadian parks started classifying fractures as "pops" (sudden planar fractures), and "drops" (sudden collapses) due to collapse of a thick weak layer. A recent analysis showed that pops and drops were common near human-triggered avalanches, but other types of fractures were infrequent near such avalanches. 5, record 1, English, - drop
Record number: 1, Textual support number: 3 CONT
Field tests at and above treeline continue to produce drops on a midpack facet layer and near the base of the snowpack. [Example approved by the Avalanche Bulletin Terminology Standardization Committee.] 6, record 1, English, - drop
Record number: 1, Textual support number: 1 OBS
Sudden Collapse (drop) SC: Fracture crosses the column with a single loading step and is associated with a noticeable collapse of the weak layer. [Reference: Table on Fracture Character in Small-Column Snowpack Tests.] 6, record 1, English, - drop
Record number: 1, Textual support number: 2 OBS
Prof. Bruce Jamieson of the University of Calgary has come up with a code for identifying weak layers[: Fracture Character in Small-Column Snowpack Tests. Three major classes of fractures are identified: Sudden fractures (e.g.: pops and drops), Resistant fractures (e.g.: progressive compressions and resistant planars) and Breaks (e.g.: non-planar breaks).] 4, record 1, English, - drop
Record number: 1, Textual support number: 3 OBS
drop; sudden collapse: terms officially approved by the Avalanche Bulletin Terminology Standardization Committee. 7, record 1, English, - drop
Record 1, French
Record 1, Domaine(s)
- Prévisions météorologiques et mesure et analyse des données
- Phénomènes météorologiques, climatiques et atmosphériques
Record 1, Main entry term, French
- affaissement soudain
1, record 1, French, affaissement%20soudain
correct, masculine noun, officially approved
Record 1, Abbreviations, French
Record 1, Synonyms, French
- rupture soudaine par effondrement 1, record 1, French, rupture%20soudaine%20par%20effondrement
correct, feminine noun, officially approved
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Les tests sur le terrain à la ligne forestière et au-dessus de celle-ci, produisent encore des affaissements soudains sur une couche intermédiaire de faces planes et près de la base du manteau neigeux. [Exemple entériné par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.] 1, record 1, French, - affaissement%20soudain
Record number: 1, Textual support number: 1 OBS
Rupture soudaine par effondrement (affaissement soudain) SC : La rupture se produit en une seule étape de surcharge sur toute la largeur de la colonne et elle s'accompagne d'un affaissement marqué de la couche fragile. [Référence : tableau sur les Caractéristiques de la rupture lors des tests de stabilité du manteau neigeux sur petite colonne.] 1, record 1, French, - affaissement%20soudain
Record number: 1, Textual support number: 2 OBS
affaissement soudain; rupture soudaine par effondrement : termes uniformisés par le Comité d'uniformisation de la terminologie des bulletins d'avalanche. 2, record 1, French, - affaissement%20soudain
Record 1, Spanish
Record 1, Textual support, Spanish
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