Easterly wave: Difference between revisions

Latest revision as of 07:20, 29 March 2024

A migratory wavelike disturbance of the tropical easterlies.

It is a wave within the broad easterly current and moves from east to west, generally more slowly than the current in which it is embedded. Although best described in terms of its wavelike characteristics in the wind field, it also consists of a weak trough of low pressure. Easterly waves do not extend across the equatorial trough. To the west of the trough line in an easterly wave over the ocean, there is generally found divergence, a shallow moist layer, and exceptionally fine weather. The moist layer rises rapidly near the trough line; in and to the east of the trough line intense convergence, much cloudiness, and heavy rain showers prevail. This asymmetric weather pattern may be greatly distorted by orographic and diurnal influences if the wave passes over land areas. Easterly waves occasionally intensify into tropical cyclones.
Compare equatorial wave.

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+{{Term
+|Display title=easterly wave
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+|Definitions={{Definition
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+|Num=1
+|Meaning=A [[migratory]] wavelike [[disturbance]] of the [[tropical easterlies]].
-<div class="termentry">
+|Explanation=It is a [[wave]] within the broad easterly current and moves from east to west, generally more  slowly than the current in which it is embedded. Although best described in terms of its wavelike  characteristics in the [[wind field]], it also consists of a weak [[trough]] of low pressure. Easterly waves  do not extend across the [[equatorial trough]]. To the west of the [[trough line]] in an easterly wave  over the ocean, there is generally found [[divergence]], a shallow moist layer, and exceptionally fine  weather. The moist layer rises rapidly near the trough line; in and to the east of the trough line  intense [[convergence]], much [[cloudiness]], and [[heavy rain]] showers prevail. This asymmetric weather  pattern may be greatly distorted by [[orographic]] and [[diurnal]] influences if the wave passes over  land areas. Easterly waves occasionally intensify into [[tropical cyclones]]. <br/>''Compare'' [[equatorial wave]].
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+}}
-== easterly wave ==
+}}
-  </div>
-<div class="definition"><div class="short_definition">A [[migratory]] wavelike [[disturbance]] of the [[tropical easterlies]].</div><br/> <div class="paragraph">It is a [[wave]] within the broad easterly current and moves from east to west, generally more  slowly than the current in which it is embedded. Although best described in terms of its wavelike  characteristics in the [[wind field]], it also consists of a weak [[trough]] of low pressure. Easterly waves  do not extend across the [[equatorial trough]]. To the west of the [[trough line]] in an easterly wave  over the ocean, there is generally found [[divergence]], a shallow moist layer, and exceptionally fine  weather. The moist layer rises rapidly near the trough line; in and to the east of the trough line  intense [[convergence]], much [[cloudiness]], and [[heavy rain]] showers prevail. This asymmetric weather  pattern may be greatly distorted by [[orographic]] and [[diurnal]] influences if the wave passes over  land areas. Easterly waves occasionally intensify into [[tropical cyclones]]. <br/>''Compare'' [[equatorial wave]].</div><br/> </div>
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-[[Category:Terms_E]]