Created by wind shear, an abrupt change in the speed or direction of the flow.

Created by wind shear, an abrupt change in the speed or direction of the flow.

• A. Gust Front
• B. Shear Turbulence
• C. Mechanical Turbulence
• D. Thermal Turbulence

Answer: (C)

Wind shear creates shear turbulence. When wind speed or direction changes abruptly over a short distance, the air flow becomes irregular and eddies form, producing turbulence that is specifically driven by that wind-speed/direction gradient. This is distinct from other types: mechanical turbulence comes from friction with the ground and obstacles like trees or buildings; thermal turbulence arises from buoyant rising air due to surface heating; gust fronts are the leading edges of outflows from storms. So, the turbulence caused directly by a wind shear gradient is termed shear turbulence.

Wind shear creates shear turbulence. When wind speed or direction changes abruptly over a short distance, the air flow becomes irregular and eddies form, producing turbulence that is specifically driven by that wind-speed/direction gradient. This is distinct from other types: mechanical turbulence comes from friction with the ground and obstacles like trees or buildings; thermal turbulence arises from buoyant rising air due to surface heating; gust fronts are the leading edges of outflows from storms. So, the turbulence caused directly by a wind shear gradient is termed shear turbulence.