Which type of fog forms when warm moist air rises over a sloping terrain?

The type of fog that forms when warm moist air rises over a sloping terrain is upslope fog. This phenomenon occurs as the warm, moisture-laden air ascends the slope, causing it to cool as it moves to higher elevations. As the air cools, it reaches its dew point, leading to condensation and the formation of fog.

This type of fog is particularly common in mountainous or hilly regions where the elevation change allows for sufficient cooling of the air mass. In contrast, advection fog is created when warm moist air moves horizontally over a cooler surface, radiation fog develops on clear, calm nights when the ground cools rapidly, and ground fog forms close to the surface due to thermal radiation cooling. Each of these other types of fog arises from different mechanisms and conditions, making upslope fog distinct in its association with elevation changes and moist air rising.