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to the site. The biggest problem with this system is that if
there are no glide slab releases there is no opportunity for
the probes to return to the vertical position.Although,in
this study no effort has been made to separate glide from
normal avalanches such differentiation could be attained
by using shorter probes.In future studies correlations with
weather activity will be made, this was made difficult with
this data set as the exact times of the recorded avalanches
wasnotknowninmanyinstances.Furtherdesign
improvements are necessary such asimproving robustness
oftheelectricalconnectionsandprobesthemselves.
Despitethelimitations,theprobescanpr ovidethe
forecasterwith additional information about glide cycles
and creep in the snow.
ACKNOWLEDGEMENTS
The authors wish to thank Robin Black, The National Research
Council ofCanada,Brant Benum,Scot Davies,LakeLouise
Ski Area and The Sunshine Ski Area for their support during
this project. Wilson and Stathamperformedthis work while
under contract for Mountain Watch Inc.
REFERENCES
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Akitaya, E. and Shimizu, H. Behaviour of a Snow Cover After
CrackFormationon Mountain Slope ISSW 1988pp179-186
In derGand,H.R.andZupancic,M.SnowGliding and Ava-
lanchesInternationalSymposiumonScientificAspectsof
SnowandIceAvalanchesPublicationNumber69,1966,
pp230-242
Langinger, B. Stability and Fracture of the Snow Pack for Glide
Avalanches, Avalanche Formation, Movement and Effects, Pro-
ceedings of the Davos Symposium,IAHS Press Wallingford,
Oxfordshire. IAHS Pub #162, 1986, pp229-240
McClung D.M. Avalanche Formation, Movement and Effects,
Proceedings of the Davos Symposium, September 1986 IAHS
publication No. 162, 1987, P475-508
McClung, D.M., Bennetto J.D., Walker, S. and Golley W. Snow
Gliding on SteepRockCoquihalla,B.C. ISSW 1990pp93-94
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