Overshooting top: Difference between revisions
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<div class="definition"><div class="short_definition">( | <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|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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Latest revision as of 16:33, 25 April 2012
overshooting top[edit | edit source]
(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.
