What can the appearance of cirrus clouds before a warm front initially indicate?
Answer and explanation
Correct answer: Gradual ascent of warm moist air aloft
A warm front has a gently sloping boundary where advancing warm air gradually rises over retreating cooler air. The first cloud often observed at a considerable distance ahead of the surface front is thin, high cirrus, followed in sequence by cirrostratus, altostratus, and lower layered clouds as the front approaches. Thus cirrus can signal the early arrival of moist warm air aloft and an approaching warm-front system, although local weather variations are possible.
Frequently asked questions
What is the correct answer to this question?
Gradual ascent of warm moist air aloft
Why is this the correct answer?
A warm front has a gently sloping boundary where advancing warm air gradually rises over retreating cooler air. The first cloud often observed at a considerable distance ahead of the surface front is thin, high cirrus, followed in sequence by cirrostratus, altostratus, and lower layered clouds as the front approaches. Thus cirrus can signal the early arrival of moist warm air aloft and an approaching warm-front system, although local weather variations are possible.
Which subject and chapter does this question cover?
This is a Class 12 Geography question. Chapter: Water in the Atmosphere. Topic: Clouds and precipitation.
