What is a common characteristic of wind shear in aviation?

Wind shear is characterized by a sudden change in wind speed and/or direction over a relatively short distance in the atmosphere. A common and critical aspect of wind shear in aviation is that it can result in significant speed changes, often 50 knots or more. This can be particularly dangerous during takeoff and landing phases, as pilots must be able to anticipate and respond to these rapid changes to maintain control of the aircraft. Understanding the potential severity of wind shear is essential for flight operations, as it greatly influences aircraft performance and safety.

The other characteristics mentioned, such as occurring only at high altitudes or only in coastal regions, are not accurate. Wind shear can occur at various altitudes and in different geographic locations, making it a ubiquitous concern in aviation rather than being limited to specific conditions. Additionally, wind shear does not result in consistent wind direction; instead, it is defined by its very variability.