wind shear


wind shear

noun

Definition of WIND SHEAR

:  a radical shift in wind speed and direction that occurs over a very short distance

First Known Use of WIND SHEAR

1941

wind shear

noun    (Concise Encyclopedia)

Rate of change of wind velocity with distance perpendicular to the wind direction. A very narrow zone of abrupt velocity change is known as a shear line. Wind shear is observed near the ground and in jet streams, where it may be associated with clear-air turbulence. Vertical wind shear is closely associated with the vertical flux of momentum, heat, and water vapour.

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