What does de-icing refer to?

De-icing specifically refers to the process of removing ice that has already formed on surfaces, such as aircraft wings, runways, or vehicles. This process is crucial in aviation and transportation as ice can significantly impede performance and safety. When ice accumulates, it can alter the aerodynamic properties of an aircraft or create dangerous conditions on the ground, leading to potential accidents.

In practical terms, de-icing typically involves the use of chemical agents or heated systems that help to melt and eliminate the ice layer. Understanding this process is vital for safety protocols in environments where winter weather creates icy conditions. Other options, such as melting snow or preventing ice formation, relate to winter weather management but do not specifically describe the action of removing ice that is already present. Thus, the focus on removing ice clarifies the nature of de-icing specifically.