Which type of fog occurs from moist air moving up rising terrain?

Upslope fog forms when moist air is forced to rise up the slopes of terrain, such as hills or mountains. As this air ascends, it expands and cools adiabatically. When the air cools to its dew point temperature, condensation occurs, resulting in the formation of fog. This type of fog is commonly found in mountainous regions where moist air can be effectively lifted, leading to reduced visibility and localized weather phenomena.

In contrast, frontal fog occurs in relation to weather fronts, where warm, moist air is lifted over cooler air masses, typically leading to precipitation and cloud formation rather than the specific terrain-related conditions that define upslope fog. Radiation fog is formed under clear skies on calm nights when the ground cools rapidly, causing moisture near the surface to condense. Advection fog develops when warm, moist air moves over a cooler surface, leading to cooling and condensation but not directly related to the lifting mechanism of terrain. Each of these other types of fog has distinct characteristics that differentiate them from upslope fog.