David Megginson wrote: > Arnt Karlsen wrote: > > ..ahem, _not_; wave lift sometimes cause static clouds over and > > downwind of mountain ridges, in some cases you can fly backwards > > thru these clouds. ;-) > > I'm trying to think this one through.
It's a condensation effect. The air gets carried up over a mountain into lower pressures. The expansion causes it to cool down. If it starts out humid enough, it will eventually reach the dewpoint and the water will condense out and it will become a "cloud". Then it goes back down the ridge, compresses, heats up, and reabsorbs the water to become "clear air" again. To an outside observer, it looks like the cloud is staying in the same place over the ridge as the air moves "through" it. Andy _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
