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What causes high pressure over land in winter?

Answer and explanation

Correct answer: Cooling of land

Direct answer: Option A, cooling of land. Pressure is related to air temperature and movement. In winter, land loses heat quickly and becomes colder than the nearby sea. Step by step: the land cools; air touching the cold land also cools; cooler air becomes denser and heavier; it tends to sink; sinking air produces relatively high pressure at the surface. Option A is correct. Option B, extreme heating of land, makes air warm and rising, which is associated with lower pressure, not winter high pressure over land. Option C, freezing of the sea, is not the general cause; the sea usually cools more slowly than land. Option D, loo, is a hot, dry summer wind and does not explain winter pressure. Exam cue: cold, dense sinking air means high pressure; warm, rising air means low pressure.

Related tags

WinterHigh PressureLand Cooling

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