How is warm front formation different from occluded front formation?
A: A warm air mass rises above a cold air mass during a warm front, but two cold air masses surround a warm air mass during an occluded front.
B: Two cold air masses surround a warm air mass during a warm front, but a cold air mass moves against a warm air mass during an occluded front.
C: A cold air mass moves faster than a warm air mass during a warm front formation, but a cold air mass is pushed upward during an occluded front.
D: A warm air mass and a cold air mass form a boundary during a warm front, but water condenses between two air masses during an occluded front.
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(B) Two cold air masses surround a warm air mass during a warm front, but a cold air mass moves against a warm air mass during an occluded front.
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Answer:
Option A is the correct answer. During a warm front, a warm air mass rises above a cold air mass, whereas during an occluded front, two cold air masses surround a warm air mass.
Explanation:
- Warm front: A warm front is generated when a warm air mass attempts to displace a cold air mass. Warm fronts move slowly because pushing the denser cold air is more difficult. A reduction in air pressure is the first symptom of an oncoming warm front. Warm fronts are often accompanied by rain and thunderstorms. Temperatures rise after the warm front passes, and gloomy, wet weather prevails. Warm fronts are depicted on a weather map by a solid red line with red semicircles.
- Occluded front: An occluded front is generated when a warm air mass is stuck between two cold air masses, and the cold air mass in the back seeks to overwhelm the warm air mass in the middle. Warm air is forced upwards, resulting in towering clouds.
Hence, during a warm front, a warm air mass rises above a cold air mass but warm air is surrounded by two cold air masses during the occluded front.
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