Which statement best describes how radiation fog can be dispersed?

Which statement best describes how radiation fog can be dispersed?

• A. Convection or strong winds
• B. Calm, dry conditions
• C. Cooling the air further
• D. Increasing humidity

Answer: (A)

Radiation fog disperses when the air is mixed enough to bring in warmer, drier air that evaporates the fog droplets. Convection from daytime heating or mechanical turbulence from strong winds always provides that mixing, breaking up the saturated layer and allowing the fog to dissipate. Calm, dry conditions don’t promote mixing, so the fog tends to linger. Cooling the air further or increasing humidity would either deepen the fog or keep it, rather than disperse it.

Radiation fog disperses when the air is mixed enough to bring in warmer, drier air that evaporates the fog droplets. Convection from daytime heating or mechanical turbulence from strong winds always provides that mixing, breaking up the saturated layer and allowing the fog to dissipate. Calm, dry conditions don’t promote mixing, so the fog tends to linger. Cooling the air further or increasing humidity would either deepen the fog or keep it, rather than disperse it.