METEOROLOGY – CLOUD & VIIBILITY CALCULATOR
Fog Dispersal Time
A precise tool.
What is the Fog Dispersal Time & How does it work?
Radiation fog is a type of ground-level stratus cloud that forms when the air near the surface cools to its dew point, often due to radiative cooling. This process typically occurs on clear nights with little wind.
The rate at which radiation fog disperses depends on several factors including solar angle, temperature, and humidity. The higher the sun’s position in the sky (larger solar angle), the faster the fog will dissipate due to increased solar radiation warming the ground and air.
T = frac{Delta T}{k cdot A}
T = Time for fog dispersal, Delta T = Temperature difference between air and ground, k = thermal conductivity constant, A = solar angle
Parameters
Result
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Frequently Asked Questions
What is radiation fog?
Radiation fog is a ground-level stratus cloud that forms when air near the surface cools to its dew point, typically at night with little wind.
How does solar angle affect fog dispersal?
A higher solar angle increases solar radiation warming the ground and air, leading to faster fog dispersion.
What factors determine fog dispersal time?
Fog dispersal time depends on solar angle, temperature, humidity, and wind speed.
Can fog disperse without sunlight?
Yes, fog can disperse through other means such as wind, mixing with warmer air, or evaporation.
What is the dew point in relation to fog formation?
The dew point is the temperature at which air becomes saturated and condensation occurs, leading to fog formation.
How does humidity impact fog dispersal?
Higher humidity can slow down fog dispersal as there is more moisture available for condensation.
Is there a specific formula to calculate fog dispersal time?
Yes, the formula involves factors like solar angle, temperature, and humidity, but it requires precise measurements and calculations.
Results are for informational purposes only and do not constitute professional advice.