Difference between revisions of "Melting level"

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<div class="definition"><div class="short_definition">The [[altitude]] at which [[ice crystals]] and snowflakes begin to melt as they descend  through the [[atmosphere]]. In [[cloud physics]] and in [[radar meteorology]], this is the accepted term  for the 0&deg;C constant-temperature surface (<br/>''see'' [[bright band]]).</div><br/> <div class="paragraph">It is physically more apt than the corresponding operational term, [[freezing level]], for melting  of pure [[ice]] must begin very near 0&deg;C, but [[freezing]] of liquid water can occur over a broad [[range]]  of temperatures (between 0&deg; and &minus;40&deg;C; <br/>''see'' [[supercooling]]). <br/>''See also'' [[freezing point]], [[ice point]],  [[melting point]].</div><br/> </div>
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<div class="definition"><div class="short_definition">The [[altitude]] at which [[ice crystals]] and snowflakes begin to melt as they descend  through the [[atmosphere]]. In [[cloud physics]] and in [[radar meteorology]], this is the accepted term  for the 0&#x000b0;C constant-temperature surface (<br/>''see'' [[bright band]]).</div><br/> <div class="paragraph">It is physically more apt than the corresponding operational term, [[freezing level]], for melting  of pure [[ice]] must begin very near 0&#x000b0;C, but [[freezing]] of liquid water can occur over a broad [[range]]  of temperatures (between 0&#x000b0; and -40&#x000b0;C; <br/>''see'' [[supercooling]]). <br/>''See also'' [[freezing point]], [[ice point]],  [[melting point]].</div><br/> </div>
 
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Latest revision as of 14:39, 20 February 2012



melting level

The altitude at which ice crystals and snowflakes begin to melt as they descend through the atmosphere. In cloud physics and in radar meteorology, this is the accepted term for the 0°C constant-temperature surface (
see bright band).

It is physically more apt than the corresponding operational term, freezing level, for melting of pure ice must begin very near 0°C, but freezing of liquid water can occur over a broad range of temperatures (between 0° and -40°C;
see supercooling).
See also freezing point, ice point, melting point.


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