| Radiation fog forms due to surface cooling at night in a light wind. Advection fog forms when warm humid air flows over a cold surface. |
| Radiation fog is formed by surface cooling in a calm wind. Advection fog is formed by evaporation over the sea. |
| Radiation fog forms due to night cooling and advection fog due to daytime cooling. |
| Radiation fog forms only on the ground, advection fog only on the sea. |
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