Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

3

Ou

thermometer [.1]

Brevets

S/O

Description générale

Clear colourless glass; black scale; metallic bulb; thin silver line of mercury.

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

22,6 cm

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Chimie

Catégorie

Équipement d'essai et mesure

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Colombie-Britannique

Période

late 1970’s – ca. 2000’s

Canada

Parks Canada operates a snow study plot in Rogers Pass National Historic Site of Canada in Glacier National Park, B.C. Combined with meteorological data, the daily information gathered, recorded and monitored from studying the snowpack was used to produce daily avalanche forecasts and bulletins. Set in the context of “Snow Research” for “Avalanche Control”.

Fonction

Part of the snow study kit, these standard thermometers were used to measure the temperature within the snow pack, where temperatures can fluctuate drastically (called the temperature gradient) - from the warmer snow temps which promote high crystal growth rate found in deeper layers, to cooler temps that favor slower crystal growth rate typically found nearer the surface. Generally, snow crystal growth increases under high temperature gradients where the formation of faceting of the crystals is associated with unstable snow, weak layers and bonds, and favorable to avalanche conditions. At lower temperature gradients however, snow crystal growth is slower, promoting rounded snow crystals whose bonds are stronger - a more stable snowpack .

Technique

These standard thermometers can be used to determine air temperature as well as snow temperatures within the snowpack.

Notes sur la région

Inconnu

Détails

Marques

None.

Manque

Nothing missing.

Fini

Clear colourless glass; black scale; metallic bulb; thin silver line of mercury.

Décoration

None.