From another message board -

Inside Afghanistan’s Deadly Copter War | Danger Room | Wired.com



Afghanistan is weird,” explains Black Hawk pilot Chief Warrant Officer 2 Steve Atencio. <b>“Temperature change doesn’t occur the same as it does back home, for some reason.</b> There is usually a standard lapse rate [in temperature]. You gain or lose 2 degrees [as you descend or ascend a certain altitude], but for some reason here, it’s more dramatic. We’re continually looking at that tab data to ensure you won’t have a mishap.”
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Lessons learned never passed on, or perhaps forgotten?

My A-10 unit didn't do as well as they would have liked in Gunsmoke(1989?). Weapons School guys started analysing all the bombs, and the inputs into the bomb(dive angle, speed, G's, etc, etc) to figure out where the bombing system was being affected. Couldn't figure it out...until they started thinking about the temperature lapse rate. Gunsmoke is held in Neveda, higher and drier, then the east coast/Europe environment.

They got together with the factory guys and figured out how to manually adjust the temperature that the air data computer used to figure out bomb flight path. 1991 Gunsmoke winners was the result(obviously not the only reason).