Which fog type typically forms when warm air flows from the sea to the land at night?

Advection fog forms when warm, moist air moves horizontally over a cooler surface, leading to cooling of the air at the surface to its dew point, which results in fog. In the context of warm air flowing from the sea to the land at night, the sea is generally warmer than the cooler land surface. This temperature difference causes the warm air to cool as it moves over the land, leading to the condensation of moisture in the air and the subsequent formation of fog. This process is commonly observed along coastal areas, especially during the transition from day to night.

In contrast, steam fog occurs when cold air moves over warmer water, causing moisture to evaporate and form fog. Upslope fog typically forms when moist air is forced to rise over a topographical barrier, cooling as it rises. Radiation fog develops on clear nights when the ground cools quickly, cooling the air in contact with it and leading to fog formation. Each of these other types of fog has a unique formation mechanism that does not apply to the scenario of warm air moving from the sea to cooler land.