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An accumulation of melt-water on ice, mainly due to melting snow, but in the more advanced stages also due to the melting of ice.

Related Terms

ICE JAM

An accumulation of broken river ice or sea ice caught in a narrow channel

ICE-BLINK

A whitish glare on low clouds above an accumulation of distant ice

ICEBERG TONGUE

A major accumulation of icebergs projecting from the coast, held in place by grounding and joined together by fast ice.

ICE SHELF

A floating ice sheet attached to the coast and of considerable thickness, showing 20 to 50 meters or more above sea level. Usually of great horizontal extent and with a level or gently undulating surface, the ice shelf is augmented by annual snow accumulation and often also by the seaward extension of land glaciers. Limited areas of the ice shelf may be aground. The seaward edge is called

DEFROST CYCLE

Refrigerating cycle in which evaporator frost and ice accumulation is melted.

DEFROSTING

Process of removing frost accumulation from evaporators.

HIDEOUT

Is the accumulation of chemicals on surfaces, in crevices or in deposits within the system during normal operation.

ACCRETION

Accumulation of material on the surface of an object

DETRITUS

An accumulation of the fragments resulting from the disinte- gration of rocks

FOG

A visible accumulation of tiny droplets of water, formed by condensation of water vapor in the air, with the base at the surface of the earth. It reduces visibility below 1 kilometer (0.54 nautical mile). If this is primarily the result of movement of air over a surface of lower temperature, it is called advection fog; if primarily the result of cooling of the surface of the earth and the adjacent layer of atmosphere by radiational cooling, it is called radiation fog. An advection fog occurring as monsoon circulation transports warm moist air over a colder surface is called a monsoon fog. A fog that hides less than six-tenths of the sky, and does not extend to the base of any clouds is called a ground fog. Fog formed at sea, usually when air from a warm-water surface moves to a cold-water surface, is called sea fog. Fog produced by apparent steaming of a relatively warm sea in the presence of very cold air is called steam fog, steam mist, frost smoke, sea smoke, arctic sea smoke, arctic smoke, or water smoke. Fog composed of suspended particles of ice, partly ice crystals 20 to 100 microns in diameter but chiefly, especially when dense, droxtals 12 to 20 microns in diameter is called ice fog. A rare simulation of true fog by anomalous atmospheric refraction is called mock fog. A dry fog is a fog that does not moisten exposed surfaces.

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