Under which condition can fog form near a cold surface even under high pressure?
Answer and explanation
Correct answer: When the air is stable and surface cooling is present
High-pressure conditions often produce sinking, stable air and light winds. If the surface cools the air immediately above it to its dew point, water vapour condenses into tiny droplets near the ground and radiation or advection fog may form. Thus, high pressure does not prevent fog when sufficient moisture, cooling, and stability occur. Option A gives all the essential conditions.
Frequently asked questions
What is the correct answer to this question?
When the air is stable and surface cooling is present
Why is this the correct answer?
High-pressure conditions often produce sinking, stable air and light winds. If the surface cools the air immediately above it to its dew point, water vapour condenses into tiny droplets near the ground and radiation or advection fog may form. Thus, high pressure does not prevent fog when sufficient moisture, cooling, and stability occur. Option A gives all the essential conditions.
Which subject and chapter does this question cover?
This is a Class 12 Geography question. Chapter: Water in the Atmosphere. Topic: Forms of condensation: dew, frost, fog, and mist.
