Difference between revisions of "Cloud drop"

From Glossary of Meteorology
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<div class="definition"><div class="short_definition">A spherical [[particle]] of liquid water, from a few micrometers to a few tens of micrometers  diameter, formed by [[condensation]] of [[water vapor]] on a [[hygroscopic]] aerosol particle ([[cloud  condensation nucleus]]).</div><br/> <div class="paragraph">Such drops, apparently suspended in the air with other drops, form a visible [[cloud]]. Clouds  may also contain interstitial [[haze]] particles, smaller than a few micrometers (&#x003bc;m) in diameter.  Activation distinguishes a cloud from a haze, which contains only or mainly unactivated droplets.  [[Cloud drops]] differ in size from [[drizzle drops]] and [[raindrops]]. A diameter of 0.2 mm has been  suggested as an upper limit to the size of drops that shall be regarded as cloud drops; larger drops  fall rapidly enough so that only very strong updrafts can sustain them. Any such division is somewhat  arbitrary, and active [[cumulus]] clouds sometimes contain cloud drops much larger than this.</div><br/> </div>
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<div class="definition"><div class="short_definition">A spherical [[particle]] of liquid water, from a few micrometers to a few tens of micrometers  diameter, formed by [[condensation]] of [[water vapor]] on a [[hygroscopic]] aerosol particle ([[cloud condensation nuclei|cloud  condensation nucleus]]).</div><br/> <div class="paragraph">Such drops, apparently suspended in the air with other drops, form a visible [[cloud]]. Clouds  may also contain interstitial [[haze]] particles, smaller than a few micrometers (&#x003bc;m) in diameter.  Activation distinguishes a cloud from a haze, which contains only or mainly unactivated droplets.  [[Cloud drops]] differ in size from [[drizzle drops]] and [[raindrops]]. A diameter of 0.2 mm has been  suggested as an upper limit to the size of drops that shall be regarded as cloud drops; larger drops  fall rapidly enough so that only very strong updrafts can sustain them. Any such division is somewhat  arbitrary, and active [[cumulus]] clouds sometimes contain cloud drops much larger than this.</div><br/> </div>
 
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Latest revision as of 16:38, 25 April 2012



cloud drop

A spherical particle of liquid water, from a few micrometers to a few tens of micrometers diameter, formed by condensation of water vapor on a hygroscopic aerosol particle (cloud condensation nucleus).

Such drops, apparently suspended in the air with other drops, form a visible cloud. Clouds may also contain interstitial haze particles, smaller than a few micrometers (μm) in diameter. Activation distinguishes a cloud from a haze, which contains only or mainly unactivated droplets. Cloud drops differ in size from drizzle drops and raindrops. A diameter of 0.2 mm has been suggested as an upper limit to the size of drops that shall be regarded as cloud drops; larger drops fall rapidly enough so that only very strong updrafts can sustain them. Any such division is somewhat arbitrary, and active cumulus clouds sometimes contain cloud drops much larger than this.