Spicule: Difference between revisions

From Glossary of Meteorology
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#<div class="definition"><div class="short_definition">A spike of [[ice]] formed during the [[freezing]] of a water drop or a contained volume of  water (as in a puddle or freezer container); expansion of the inward freezing ice expels any remaining  water through a weak point in the shell which then freezes as a spike in the colder [[environment]].</div><br/> </div>
#<div class="definition"><div class="short_definition">A spike of [[ice]] formed during the [[freezing]] of a water drop or a contained volume of  water (as in a puddle or freezer container); expansion of the inward freezing ice expels any remaining  water through a weak point in the shell which then freezes as a spike in the colder [[environment]].</div><br/> </div>
#<div class="definition"><div class="short_definition">Bright spike of [[luminous]] gas extending from the [[chromosphere]] into the [[corona]] of the  sun.</div><br/> <div class="paragraph">Spicules are several hundred kilometers in diameter and extend outward 5000&ndash;10 000 km.  Observed in photographs of the limb, these features have a lifetime of several minutes.</div><br/> </div>
#<div class="definition"><div class="short_definition">Rapidly changing, predominantly vertical spike-like structures in the solar [[chromosphere]] and observed extending from the solar limb. Spicules appear to be ejected from the low chromosphere at velocities of 20&#8211;30 km s<sup>&#8722;1</sup> and can reach heights of 9000 km before falling back or fading. Their total lifetime generally spans 5&#8211;10 minutes.</div><br/> </div>
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<p>''Term edited 10 September 2018.''</p>


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Latest revision as of 05:28, 10 September 2018



spicule[edit | edit source]

  1. A spike of ice formed during the freezing of a water drop or a contained volume of water (as in a puddle or freezer container); expansion of the inward freezing ice expels any remaining water through a weak point in the shell which then freezes as a spike in the colder environment.

  2. Rapidly changing, predominantly vertical spike-like structures in the solar chromosphere and observed extending from the solar limb. Spicules appear to be ejected from the low chromosphere at velocities of 20–30 km s−1 and can reach heights of 9000 km before falling back or fading. Their total lifetime generally spans 5–10 minutes.


Term edited 10 September 2018.


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