Which characteristic of advection fog is true?

Advection fog is a type of fog that forms when warm, moist air moves over a cooler surface, which causes the air temperature to drop and reach the dew point. This process leads to the condensation of water vapor in the air, resulting in fog formation.

The correct answer highlights that advection fog can appear suddenly and tends to be more persistent than radiation fog. This is due to the nature of its formation; as long as the warm, moist air continues to flow over the cooler surface, the fog can remain in place. It does not depend solely on nighttime conditions, and it can persist during the day as long as the conditions are favorable.

In contrast, radiation fog typically forms during the night due to cooling at ground level and dissipates once the sun rises and warms the air. Advection fog, however, may not dissipate quickly after sunrise because its persistence is related to the ongoing movement of air, which can keep the fog intact even in daylight.

Furthermore, advection fog is not limited to mountainous areas; it can occur over various terrains where there is a temperature contrast between the air and the surface it moves over. This characteristic allows it to be more widespread compared to other types of fog, such as radiation fog, which