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"> | #<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 20–30 km s<sup>−1</sup> and can reach heights of 9000 km before falling back or fading. Their total lifetime generally spans 5–10 minutes.</div><br/> </div> | ||
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<p>''Term edited 10 September 2018.''</p> | |||
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Latest revision as of 04:28, 10 September 2018
spicule
- 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.
- 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.
