Nu ook op het internet bevestiging gevonden dat lijn van convectie inderdaad lijgolven kan veroorzaken. De bron is me niet helemaal duidelijk. Het is afkomstig van
'absoluteastronomy.com' ("Exploring the universe of knowledge")
Bron:absoluteastronomy.com
In meteorology, lee waves, are atmospheric standing waves. The most common form is mountain waves, which are atmospheric internal gravity waves. These were discovered in 1933 by two German glider pilots, Hans Deutschmann and Wolf Hirth, above the Riesengebirge. They are periodic changes of atmospheric pressure, temperature and orthometric height in a current of air caused by vertical displacement, for example orographic lift when the wind blows over a mountain or mountain range. They can also be caused by the surface wind blowing over an escarpment or plateau, or even by upper winds deflected over a thermal updraft or cloud street.
The vertical motion forces periodic changes in speed and direction of the air within this air current. They always occur in groups on the lee side of the terrain that triggers them. Usually a turbulent horizontal vortex is generated around the first trough, the so called rotor. The strongest lee waves are produced when the lapse rate shows a stable layer above the obstruction, with an unstable layer above and below.
Verder is een hele tijd geleden ook een artikel gepubliceerd:
Takle, E. S. and Brown, J. M.: 1982, 'Altocumulus Lenticularis Clouds over Flat Terrain',
Helaas kan ik het artikel zelf niet vinden op internet, alleen citaties. Dus waarschijnlijk is dat niet vrij beschikbaar.
Groeten,
Bas
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