Freezing level: Difference between revisions

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|Meaning=Commonly, and in aviation terminology, the lowest [[altitude]] in the [[atmosphere]], over  a given location, at which the [[air temperature]] is 0°C; the height of the 0°C constant-temperature  surface.
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|Explanation=This simple concept may become slightly complicated by the existence of one or more "above-  freezing layers" formed by [[temperature]] inversions at altitudes higher than the above-defined  freezing level. In [[cloud physics]] terminology, this is more accurately termed the [[melting level]], for  melting of [[ice]] always occurs very near 0&#x000b0;C, but liquid [[cloud drops]] may remain supercooled to  much colder temperatures. <br/>''See'' [[icing level]].
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== freezing level ==
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<div class="definition"><div class="short_definition">Commonly, and in aviation terminology, the lowest [[altitude]] in the [[atmosphere]], over  a given location, at which the [[air temperature]] is 0&#x000b0;C; the height of the 0&#x000b0;C constant-temperature  surface.</div><br/> <div class="paragraph">This simple concept may become slightly complicated by the existence of one or more "above-  freezing layers" formed by [[temperature]] inversions at altitudes higher than the above-defined  freezing level. In [[cloud physics]] terminology, this is more accurately termed the [[melting level]], for  melting of [[ice]] always occurs very near 0&#x000b0;C, but liquid [[cloud drops]] may remain supercooled to  much colder temperatures. <br/>''See'' [[icing level]].</div><br/> </div>
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Latest revision as of 12:05, 30 March 2024

Commonly, and in aviation terminology, the lowest altitude in the atmosphere, over a given location, at which the air temperature is 0°C; the height of the 0°C constant-temperature surface.

This simple concept may become slightly complicated by the existence of one or more "above- freezing layers" formed by temperature inversions at altitudes higher than the above-defined freezing level. In cloud physics terminology, this is more accurately termed the melting level, for melting of ice always occurs very near 0°C, but liquid cloud drops may remain supercooled to much colder temperatures.
See icing level.

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