Sea ice terminology. Describes a floating ice sheet of considerable thickness that is visible 2 metres or more above sea level, and is attached to the coast. They usually have great horizontal extensi
on, and a level or gently rolling surface. Ice shelf growth occurs with annual snow accumulation, and also by the extension of land glaciers over see. Limited areas of the ice shelf may be attached to land. The edge facing the sea is termed as ice front.
A floating ice sheet of considerable thickness showing 2-50 m or more above sea-level, attached to the coast or a glacier. Usually of great horizontal extent and with a level or gently undulating surf
ace. Nourished by annual snow accumulation at the surface and often also by the seaward extension of land glaciers. Limited areas may be aground. The seaward edge is termed an ice front.
A floating ice sheet of considerable thickness showing 6 to 165 ft (2-50 m) or more above sea level, attached to the coast. Usually of great horizontal extent and with a level or gently undulating sur
face. Nourished by annual snow accumulation and also by the seaward extension of land glaciers. Limited areas may be aground. The seaward edge is termed an ice front.
A floating ice sheet of considerable thickness attached to a coast. Ice shelves are usually of great horizontal extent and have a level or gently undulating surface. They are nourished by the accumula
tion of snow and often by the seaward extension of land glaciers. Limited areas may be aground. The seaward edge is termed an ice front (q.v.).
A thick ice formation with a fairly level surface, formed along a polar coast and in shallow bays and inlets, where it is fastened to the shore and often reaches bottom. An ice shelf may grow hundreds
of miles out to sea. It is usually an extension of land ice, and the seaward edge floats freely in deep water. The calving of an ice shelf forms tabular icebergs and ice islands. (Also called shelf ice; formerly barrier.)
Glaciers which are tributaries of an ice shelf. Approximate grounding line may be detectable. This class has been introduced due to the necessity for classifying glaciers which are tributaries of an i
ce shelf.
A pinnacle of ice, shaped like a triangular sail, typically several metres high, formed as a result of differential ablation under strong solar radiation, mainly in low, but sometimes high-arid latitu
des.
From the point of view of the submariner, thin places in the ice canopy, usually less than 1 meter (3.3 feet) thick and appearing from below as relatively light, translucent patches in dark surroundin
gs; the under-surface of an ice skylight is normally flat; ice skylights are called large if big enough for a submarine to attempt to surface through them (120 meters, 131 yards), or small if not.
From the point of view of the submariner, thin places in the ice canopy, usually less than 1 m thick and appearing from below as relatively light translucent patches in dark surroundings. The under-su
rface of an ice skylight is normally flat. Ice skylights are called large if big enough for a submarine to attempt to surface through them (120 m) or small if not.
A storm characterized by a fall of freezing liquid precipitation. The attendant formation of glaze on terrestrial objects creates many hazards. (Also called silver storm.)
An ice storm is used to describe occasions when damaging accumulations of ice are expected during freezing rain situations. Significant accumulations of ice pull down trees and utility lines resulting
in loss of power and communication. These accumulations of ice make walking and driving extremely dangerous. Significant ice accumulations are usually accumulations of