What type of fog is caused by warm, moist air moving over a cool surface?

Advection fog forms when warm, moist air travels over a cooler surface, leading to the condensation of water vapor in the air. This type of fog typically occurs along coastlines where warm maritime air can move over cooler ocean waters or land, resulting in reduced visibility. The temperature difference between the air and the surface causes the moisture in the air to condense into tiny water droplets, creating fog. This is a common phenomenon in areas where warm air masses are prevalent, particularly near bodies of water.

In contrast, radiation fog is formed when the ground cools rapidly at night through radiation, causing the air closest to the surface to cool and reach its dew point. Upslope fog develops as air is forced to rise over topographical features, which can cool the air enough for condensation to occur. Frontal fog typically occurs at warm fronts when warmer, moist air rises over cooler air, leading to the condensation of moisture; however, it is not primarily driven by the movement of the air over a surface as in advection fog.