Meteorology · Fog
Radiation fog is characteristically a fog that:
- AForms only in mid-ocean during gales
- BIs produced by warm rain falling through cold air
- CForms over land on clear, calm nights and is rare over the open sea✓ Correct
- DOnly occurs in the tropics at noon
Explanation
Radiation fog forms over land at night when the surface cools by radiation under clear skies and light winds, chilling the air above to its dew point. It needs a land surface, so it affects harbors and rivers rather than the open ocean.
Authority: Bowditch (Pub. No. 9)
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