Radiation fog is characterized by which of the following?

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Multiple Choice

Radiation fog is characterized by which of the following?

Radiation fog forms when the ground loses heat to space at night (radiational cooling) and the air just above the surface cools to its dew point, causing water vapor to condense into tiny droplets. This happens most readily under clear skies and light winds, which let the surface cool without stirring the air, and it typically occurs after a clear, calm night with moist near-surface air. If warm, moist air moves over a cooler surface, fog forms through advection, not radiational cooling. Upslope fog results from air cooling as it rises along terrain. Fog from mixing happens when air layers with different humidities mix, increasing the dew point or saturation. The distinctive mechanism for radiation fog is nighttime surface cooling leading to near-surface saturation.

Radiation fog forms when the ground loses heat to space at night (radiational cooling) and the air just above the surface cools to its dew point, causing water vapor to condense into tiny droplets. This happens most readily under clear skies and light winds, which let the surface cool without stirring the air, and it typically occurs after a clear, calm night with moist near-surface air.

If warm, moist air moves over a cooler surface, fog forms through advection, not radiational cooling. Upslope fog results from air cooling as it rises along terrain. Fog from mixing happens when air layers with different humidities mix, increasing the dew point or saturation. The distinctive mechanism for radiation fog is nighttime surface cooling leading to near-surface saturation.

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