Antitwilight arch: Difference between revisions

From Glossary of Meteorology
imported>Perlwikibot
No edit summary
m (Rewrite with Template:Term and clean up)
 
(One intermediate revision by the same user not shown)
Line 1: Line 1:
 
{{Term
 
|Display title=antitwilight arch
{{TermHeader}}
|Definitions={{Definition
{{TermSearch}}
|Num=1
 
|Meaning=A bright wedge of pink, orange, or [[purple light]] that extends around the antisolar  [[horizon]] during [[clear]] twilights and that has the greatest vertical width (∼3°–6°) occurring above  the [[antisolar point]].
<div class="termentry">
|Explanation=The antitwilight arch rises with the antisolar point at [[sunset]] and sets with the antisolar point  at [[sunrise]]. The antitwilight arch is brighter than the bluish gray [[dark segment]] beneath it. The  boundary between these features may be distinct shortly after sunset (sun [[elevation]] ''h''<sub>0</sub> &sim; -2&#x000b0;),  but it fades as evening [[twilight]] progresses.
  <div class="term">
}}
== antitwilight arch ==
}}
  </div>
 
<div class="definition"><div class="short_definition">A bright wedge of pink, orange, or [[purple light]] that extends around the antisolar  [[horizon]] during [[clear]] twilights and that has the greatest vertical width (&sim;3&#x000b0;&ndash;6&#x000b0;) occurring above  the [[antisolar point]].</div><br/> <div class="paragraph">The antitwilight arch rises with the antisolar point at [[sunset]] and sets with the antisolar point  at [[sunrise]]. The antitwilight arch is brighter than the bluish gray [[dark segment]] beneath it. The  boundary between these features may be distinct shortly after sunset (sun [[elevation]] ''h''<sub>0</sub> &sim; -2&#x000b0;),  but it fades as evening [[twilight]] progresses.</div><br/> </div>
</div>
 
{{TermIndex}}
{{TermFooter}}
 
[[Category:Terms_A]]

Latest revision as of 21:28, 13 January 2024

A bright wedge of pink, orange, or purple light that extends around the antisolar horizon during clear twilights and that has the greatest vertical width (∼3°–6°) occurring above the antisolar point.

The antitwilight arch rises with the antisolar point at sunset and sets with the antisolar point at sunrise. The antitwilight arch is brighter than the bluish gray dark segment beneath it. The boundary between these features may be distinct shortly after sunset (sun elevation h0 ∼ -2°), but it fades as evening twilight progresses.


A bright wedge of pink, orange, or purple light that extends around the antisolar horizon during clear twilights and that has the greatest vertical width (∼3°–6°) occurring above the antisolar point.

The point on the celestial sphere that lies directly opposite the sun from the observer, that is, on the line from the sun through the observer.

Retrieved from "https://glossarystaging.ametsoc.net/w/index.php?title=Antitwilight_arch&oldid=28124"
Powered by MediaWiki
Powered by WikiTeq
Powered by Semantic MediaWiki
Copyright 2025 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.