What is a correct indication of wind shear?

Wind shear refers to a sudden change in wind speed and/or direction over a short distance, and it can significantly affect aircraft performance during takeoff and landing. The correct indication of wind shear in this context is an airspeed change greater than 15 knots, which can indicate a rapid alteration in the wind environment around the aircraft. Such a change can result in challenges for pilot control, as it may affect lift and stall margins when approaching or departing from controlled airspace.

For pilots, recognizing significant changes in airspeed is crucial for maintaining safe flight operations. A variation of more than 15 knots often suggests that the aircraft may be encountering turbulent air or shifts in wind direction, both of which are common scenarios associated with wind shear.

Other options don’t provide reliable indicators of wind shear. A sudden increase in altitude, a sudden drop in temperature, or a steady climb rate do not specifically relate to the characteristics or effects of wind shear. These phenomena may be part of varied atmospheric conditions but do not directly signal the presence of wind shear as effectively as a notable change in airspeed does.