What is the primary contributor to wind shear?

• A. Static weather patterns
• B. Variation in wind speed and direction with altitude
• C. Consistent weather fronts
• D. Sea-level pressures

Answer: (B)

The primary contributor to wind shear is the variation in wind speed and direction with altitude. This phenomenon occurs because the atmospheric layers experience different influences from factors such as friction, temperature changes, and pressure systems. As aircraft ascend or descend, they can encounter varying wind speeds and directions, which can significantly impact their performance and handling characteristics.

In the lower atmosphere, ground friction can slow down the wind, while winds aloft may blow much faster. Such discrepancies can create sudden shifts in wind velocity and direction, leading to potential challenges for pilots during takeoff and landing phases. Understanding this variability allows pilots to anticipate and react appropriately to wind shear, enhancing safety and performance.

While static weather patterns, consistent weather fronts, and sea-level pressures all play significant roles in the overall weather dynamics, they do not primarily address the immediate impact of wind shear in the context of changes in wind behavior with altitude.