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#1. For mountain waves to form there should be flow of air across the ridge, generally within _____ of the perpendicular to the ridge.
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#2. For mountain waves to form the wind speed for small mountains should be atleast
#3. For mountain waves to form the wind speed for large mountains should be atleast
#4. For mountain waves to form there should be _____ air beow the ridge and less stable air above.
#5. The worst kind of turbulence is encountered in the vicinity of rotor clouds.
#6. In Mountain waves the Rotor clouds form in
#7. Clear air turbulences is often encountered
Jet streams are narrow bands of fast moving air commonly found beneath the tropopause. These air currents can be very fast, especially over South East Asia in winter where the highest recorded velocity was 407 kt. Around these fast currents of air are eddies and shear lines, just like around the edge of powerful river. The shear lines are created when there is marked change in wind speed and direction. This is commonly called Wind shear and is creates very dangerous Clear Air Turbulence (CAT)
#8. Most CAT occurs on the _____ of a jet stream and in the vicinity of upper level frontal zones where temperature contrasts are strong.
Jet streams are narrow bands of fast moving air commonly found beneath the tropopause. These air currents can be very fast, especially over South East Asia in winter where the highest recorded velocity was 407 kt. Around these fast currents of air are eddies and shear lines, just like around the edge of powerful river. The shear lines are created when there is marked change in wind speed and direction. This is commonly called Wind shear and is creates very dangerous Clear Air Turbulence (CAT)
#9. CAT is the bumpiness experienced by aircraft at high altitudes. Over North India its maximum frequency is during:
Due to western disturbance
#10. When approaching an area where mountain waves have been reported, a pilot should expect:
