Unbranched prismatic ice crystals, in the form of needles, columns or plates, often so tiny that they seem to be suspended in the air. These crystals may fall from a cloud or from a cloudless sky.
A fall of unbranched ice crystals, in the form of needles, columns, or plates, often so tiny that they seem to be suspended in the air; these are visible mainly when they glitter in the sunshine (diam
ond dust); they may then produce a luminous pillar or other halo phenomena; this hydrometeor, which is frequent in polar regions, occurs at very low temperatures and in stable air masses.
Part of an ice stream raised slightly higher, and flowing slightly more slowly, than surrounding ice. The attributes that define the ice raft suggest that basal sliding is relatively slow at its bed,
and therefore that it might represent a persistent 'sticky spot'.
The transportation of glacier sediment away from the ice margin by icebergs. Sediment transported by floating ice and deposited in the ocean is called glacial-marine sediment. Deposited in lakes, it i
s called glacial-lacustrine sediment.
Sea ice terminology. Describes a brittle, shiny crust of ice formed on a quiet surface by direct freezing, or from grease ice, usually in water of low salinity; with a thickness of about 5 centimetres
. Easily broken by wind or swell, it commonly breaks into rectangular pieces.
A brittle, shiny crust of floating ice, formed on a quiet surface by direct freezing or from grease ice, usually in water of low salinity; thickness less than 5 centimeters (2 inches); easily broken b
y wind or swell, commonly breaking into rectangular pieces.
A brittle shiny crust of ice formed on a quiet surface by direct freezing or from grease ice, usually in water of low salinity. Thickness to about 1 in (5 cm). Easily broken by wind or swell, commonly
breaking in rectangular pieces.
A brittle, shiny crust of floating ice, formed on a quiet surface by direct freezing or from grease ice, usually in water of low salinity. Thickness less than 5 cm. Easily broken by wind or swell, com
monly breaking in rectangular pieces.
A thin but hard layer of sea ice, river ice, or lake ice. Apparently this term is used in at least two ways: 1) for a new encrustation upon old ice; and 2) for a single layer of ice usually found in b
ays and fjords where freshwater freezes on top of slightly colder seawater. (Also called ice crust.)
A brittle shiny crust of ice formed on a calm surface by direct freezing, or from grease ice, usually in water of low salinity. Thickness to about 5 cm. Easily broken by wind or swell, commonly breaki
ng in rectangular pieces.