Six-sided microscopic particle that allows for deposition of water as ice crystals in the atmosphere. Nucleus for the formation of snowflakes. Deposition normally occurs on these particles when relati
ve humidity becomes 100%.
Depth hoares are large crystals occurring at the base of a snowpack that form due to the fact that a snow crystal can grow over time as moisture freezes onto the crystal from vapor that is rising in t
he snowpack.
A layer of ice crystals, usually cup-shaped and facetted, formed by vapour transfer (sublimation followed by deposition) within dry snow beneath the snow surface. Depth hoar is associated with very fa
st crystal growth under large temperature gradients. Sometimes a layer of depth hoar forms just above, and may assist in identifying, the summer surface. The low density and low strength of depth hoar can make it difficult to retrieve unbroken core sections during coring, and can complicate estimates of accumulation by microwave remote sensing. Layers of depth hoar also increase the likelihood of avalanching.
1.Ice crystals (usually cup-shaped, faceted crystals) of low strength formed by sublimation within dry snow beneath the snow surface; a type of hoarfrost. Associated with very fast crystal growth unde
r large temperature gradients. This is one way in which firn formation may begin. Depth hoar is similar in physical origin to crevasse hoar. 2.Hoarfrost composed of crystals that have built up a three-dimensional complex of faceted, rather than rounded, crystals.
A kind of hoarfrost; ice crystals that develop by sublimation within a layer of dry snow; characterized by rapid recrystallization, usually caused by large temperature gradients; similar in physical o
rigin to crevasse hoar; crystals are faceted, rather than rounded.
Vertical interval between the top surface of a snow layer and the ground beneath; the layer is assumed to be evenly spread over the ground which it covers.
Vertical distance between the top surface of a snow layer and the ground beneath; the layer is assumed to be evenly spread over the ground which it covers.
Vertical distance between the top of a snow layer and the horizontal ground beneath. The layer is assumed to be evenly spread on the surface. When the snow is not uniformly distributed, snow depth is
measured by taking an average of multiple measurements
The minimum distance between the ground surface and frozen ground at any time during the thawing season in an area subject to seasonal freezing and thawing
The minimum distance between the ground surface and frozen ground at any time during the thawing season in an area subject to seasonal freezing and thawing.
The minimum distance between the ground surface and Frozen Ground at any time during the thawing season in an area subject to seasonal freezing and thawing. When no Frozen Ground remains, thawing is c
omplete, and Depth of Thaw cannot be determined. Depth of Thaw may relate to the Active Layer in Permafrost environments or to any other areas with seasonal freezing.