Chapter 7: Problem 26

What type of cloud is fog? List and define the principal types of fog.

Short Answer

Expert verified

Fog is classified as a type of low-lying cloud. The main types of fog include radiation fog, advection fog, evaporation (steam) fog, and upslope fog. Each type is formed under distinct weather conditions and processes such as heat emission, moist air movement over cool surfaces, rapid evaporation and condensation, and the movement of warm, moist air up a slope.

Step by step solution

Identifying Fog as Cloud

Fog can be recognized as a type of low-lying cloud that appears at the ground level. Like clouds, fog forms when the air becomes supersaturated and the excess water vapor condenses.

Listing Principal Types of Fog

The principal types of fog are categorized based on how they form and the weather conditions that cause them. These include radiation fog, advection fog, evaporation fog (also called steam fog), and upslope fog.

Defining Principal Types of Fog

Radiation fog is formed by the cooling of land after sunset when heat absorbed by the Earth's surface during the day is emitted back into the atmosphere. Advection fog is created when moist air passes over a cool surface and is cooled. Evaporation fog or steam fog results from cold air passing over warmer water or moist land, causing the water to evaporate rapidly and then condense in the cold overlaying air. Upslope fog is formed as warm, moist air is forced up a slope and cooled, leading to condensation and fog.

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What type of cloud is fog? List and define the principal types of fog.

Short Answer

Step by step solution

Identifying Fog as Cloud

Listing Principal Types of Fog

Defining Principal Types of Fog

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