imported>Perlwikibot |
|
| Line 1: |
Line 1: |
| | | #REDIRECT: [[Lee wave]] |
| #REDIRECT [[lee wave]] | |
| | |
| {{TermHeader}}
| |
| {{TermSearch}}
| |
| | |
| <div class="termentry">
| |
| <div class="term">
| |
| == lee wave ==
| |
| </div>
| |
| | |
| #<div class="definition"><div class="short_definition">Any [[wave disturbance]] that is caused by, and is therefore stationary with respect to, some barrier in the fluid flow.</div><br/> <div class="paragraph">Whether the [[wave]] is a [[gravity wave]], [[inertia wave]], [[barotropic wave]], etc., will depend on the structure of the fluid and the dimensions of the barrier. Most research has been devoted to the gravity lee wave ([[mountain wave]]) in the [[atmosphere]], of [[wavelength]] of order <div class="display-formula"><blockquote>[[File:ams2001glos-Le13.gif|link=|center|ams2001glos-Le13]]</blockquote></div> where ''V'' is the current speed, ''T'' the Kelvin [[temperature]], ''g'' the [[acceleration of gravity]], and γ<sub>''d''</sub> and γ the [[dry-adiabatic]] and [[environmental lapse rates]], respectively. This is the wave that is evident in [[lenticular]] or [[Moazagotl]] cloud systems and is strikingly exemplified in the [[Bishop wave]]. Dynamically, the lee wave is the sum of the [[free waves]] of the system and those wave components forced by the particular shape of the barrier. The [[disturbance]] is, in general, negligible at any distance [[upstream]] of the barrier, a result that follows from the dynamics when the system is started from rest, but a point that requires special attention when the steady-state assumption is made. The term lee wave is also applied loosely to nonwave disturbances in the lee of obstacles, such as the [[rotor cloud]].</div><br/> </div>
| |
| #<div class="definition"><div class="short_definition">A [[mountain wave]] occurring to the lee of a mountain or mountain barrier.</div><br/> <div class="paragraph">These waves can become visible in the form of [[lenticular]] or trapped lee-wave clouds.</div><br/> </div><div class="reference">Eliassen, A., and E. Kleinschmidt 1957. Dynamic Meteorology. Handbuch der Geophysik. Vol. XLVIII, . 59– 64. </div><br/>
| |
| </div>
| |
| | |
| {{TermIndex}}
| |
| {{TermFooter}}
| |
| | |
| [[Category:Terms_L]]
| |
