What type of fog occurs on clear, calm nights when the air near the ground cools faster than the air higher above the ground? View Available Hint(s) precipitation fog upslope fog steam fog radiation fog advection fog

The type of fog that occurs on clear, calm nights when the air near the ground cools faster than the air higher above the ground is called **radiation fog**. ### Explanation: - **Radiation Fog** forms when the ground loses heat through radiation, cooling the air directly above it. This typically happens on clear nights when there is little to no wind, allowing the air near the surface to cool significantly. - As the air cools, it can reach its dew point, leading to condensation and the formation of fog. The other types of fog mentioned do not fit this description: - **Precipitation Fog** forms when rain falls through cool air and evaporates, adding moisture to the air. - **Upslope Fog** occurs when moist air is lifted over a topographic barrier, cooling as it rises. - **Steam Fog** forms when cold air moves over warm water, causing evaporation and subsequent condensation. - **Advection Fog** occurs when warm, moist air moves over a cooler surface, leading to cooling and condensation. Thus, the correct answer is **radiation fog**.