Metro-03
Meteorology Review
D.
Clear air turbulence (CAT) 1.1.1.4.1.1
Sg 3, fr 7
Fig 7 & 8:
1.
Jet Stream CAT 1.1.1.3.5
Jet Stream Clear Air
Turbulence (CAT)
a.
Caused by shear zones associated with the
movement of wind within the jet stream
b.
Most common when wind speed increases or
decreases rapidly between altitudes
c.
Common near areas of highest wind velocity
within the jet stream, on the polar side and
below the core
?
Where is the most severe turbulence in a mountain
wave phenomenon?
ANSWER: Near rotor cloud formations
2.
Mountain wave CAT
Sg 3, fr 8
Fig 9: Mountain
a.
High velocity airflow over mountain range is
Wave Phenomenon
disrupted and causes turbulence over and
downwind of range
b.
Produces large “waves” of air with strong
updrafts and downdrafts
c.
Rotor turbulence very severe below wave, tops
of mountains, and especially near rotor
clouds—similar to turbulence found near
thunderstorms
(7-97) Original
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