What is defined as a sudden, brief increase in wind speed?

A sudden, brief increase in wind speed is referred to as a gust. Gusts typically manifest as short bursts of wind that can occur quickly and vary in intensity. They can have significant implications for aviation, as they can affect an aircraft's performance and handling characteristics. Understanding gusts is crucial for pilots and air traffic control personnel, as they influence landing and takeoff procedures, especially in adverse weather conditions.

The other terms mentioned do not accurately describe this phenomenon. A shift generally refers to a change in wind direction rather than speed. A blow is more colloquial and may not be used in technical meteorological discussions. Similarly, a surge typically implies a more sustained increase or flow, which does not align with the brief nature of a gust. Thus, the term "gust" is the precise terminology for this specific wind condition.