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Old April 28th 05, 05:41 PM posted to sci.geo.meteorology
Dan Mckenna Dan Mckenna is offline
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First recorded activity by Weather-Banter: Nov 2004
Posts: 17
Default wind speed increase over a ridge and atmospheric gravity waves

Hello and thanks for reading this,

We have an observatory on top of a mountain and I notice
that the wind speed is above the radiosonde winds and NAM 40Km
prediction for this location. I also observe 5 to 15 minute oscillations
in the wind speed and some times also see this in dew point.

Is it possible to relate the ridge geometry cap inversion height to the
speed up factor, radiosonde lapse rate, oscillation frequency and
percent variation in wind speed to estimate the vertical scale size of
the mountain influence ? (mtn outer scale ?)

I assume what I am seeing is atmospheric gravity waves and related Mtn
wave phenomena.

I also see periods in the same range of the wind oscillation in the
optically significant turbulence.

My guess is I will need to use RAMS or the like to investigate the
dependence of all this.

Is there a RAMS modeler in the group that can help me start the model ?

Thanks for your time

Dan McKenna