Advection fog forms when moist air moves over colder ground or water. It is most common along coastal areas, but often develops deep in continental areas. Advection fog deepens as wind speed increases up to about 15 knots. Wind much stronger than 15 knots lifts the fog into a layer of low stratus or stratocumulus. Upslope fog forms as a result of moist, stable air being cooled adiabatically as it moves up sloping terrain. Once upslope wind ceases, the fog dissipates.Answer (A) is incorrect because radiation fog and ice fog do not depend upon wind in order to exist. Answer (B) is incorrect because ground fog does not depend on wind in order to exist.
Advection fog forms when moist air moves over colder ground or water. It is most common along coastal areas, but often develops deep in continental areas. Advection fog deepens as wind speed increases up to about 15 knots. Wind much stronger than 15 knots lifts the fog into a layer of low stratus or stratocumulus. Upslope fog forms as a result of moist, stable air being cooled adiabatically as it moves up sloping terrain. Once upslope wind ceases, the fog dissipates.Answer (A) is incorrect because radiation fog and ice fog do not depend upon wind in order to exist. Answer (B) is incorrect because ground fog does not depend on wind in order to exist.
