Recreational Pilot Licence · Practice

Advection fog forms when:

• A.Atmospheric pressure rises rapidly causing the dewpoint to fall below surface temperature
• B.A pool of warm moist air rises overnight and cools adiabatically to form fog at dawn
• C.Air is heated rapidly over sun-warmed land and rises to form low cloud by noon
• D.Warm moist air moves horizontally over a cooler surface, cooling to its dewpoint