Difference between revisions of "Overshooting top"

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<div class="definition"><div class="short_definition">(<br/>''Or'' anvil dome, penetrating top.) A domelike protrusion above a [[cumulonimbus]]  anvil, representing the intrusion of an [[updraft]] through its [[equilibrium]] level ([[level of neutral  buoyancy]]).</div><br/> <div class="paragraph">It is usually a [[transient]] feature because the rising [[parcel]]'s [[momentum]] acquired during its  buoyant ascent carries it past the point where it is in equilibrium; the air within it rapidly becomes  negatively buoyant and descends. Tall and persistent overshooting tops are frequently observed  with strong or severe [[thunderstorms]] in which there is a nearly continuous stream of buoyant  updrafts.</div><br/> </div>
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<div class="definition"><div class="short_definition">(''Or'' anvil dome, penetrating top.) A domelike protrusion above a [[cumulonimbus]]  anvil, representing the intrusion of an [[updraft]] through its [[equilibrium]] level ([[level of neutral  buoyancy]]).</div><br/> <div class="paragraph">It is usually a [[transient]] feature because the rising [[parcel]]'s [[momentum]] acquired during its  buoyant ascent carries it past the point where it is in equilibrium; the air within it rapidly becomes  negatively buoyant and descends. Tall and persistent overshooting tops are frequently observed  with strong or severe [[thunderstorms]] in which there is a nearly continuous stream of buoyant  updrafts.</div><br/> </div>
 
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Revision as of 14:48, 20 February 2012



overshooting top

(Or anvil dome, penetrating top.) A domelike protrusion above a cumulonimbus anvil, representing the intrusion of an updraft through its equilibrium level (level of neutral buoyancy).

It is usually a transient feature because the rising parcel's momentum acquired during its buoyant ascent carries it past the point where it is in equilibrium; the air within it rapidly becomes negatively buoyant and descends. Tall and persistent overshooting tops are frequently observed with strong or severe thunderstorms in which there is a nearly continuous stream of buoyant updrafts.