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it is because air sinks at the poles
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∙ 10y ago
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High pressure areas are created around the poles as cold air?
It RISES...
After high pressure areas are created around the poles cold polar air flows toward?
The low pressure area at the Equator.
Why does air flow from the poles to the equator?
It goes south and new hot air comes up to the poles to be frozen and pushed back down.
Are veins under high pressure?
No, veins are not under high pressure. High-pressure vessels are the arteries.
Why do the warm tropical air sink when they reach the poles?
Think of the air at the Equator as a column. If you heat it, the air in the column expands and rises, cooling as it does so. As the column gets taller, at altitude you have relatively higher pressure, and the air flows out towards a lower pressure area. When the air flows out from the top of the column, it leaves lower pressure at the surface. The opposite happens at the poles where the air is cold and dense. The column is shorter and heavier than the column at the Equator. The pressure is lower at altitude and so the high pressure air from the Equator flows there. Adding air to the top of the polar column raises the surface pressure and the air flows from there to a lower pressure area at the equator. So you get a circulation, out from the Equator to the poles at high level, and in towards the Equator at lower level. The air that left the Equator was warm when it was on the surface at the Equator, but by the time it has risen 40,000-50,000 feet and traveled several thousand miles at high altitude, it is no longer warm. The rotation of the earth and the roughness of the terrain affect the flow greatly, and the air at the surface tends to turn to the right causing rotating areas of high and low pressure.
What kind of pressure does the air masses at the poles?
low pressure and high pressure
Would you expect high or low air pressure at the poles?
you would expect it to have high pressure
Do you see areas of low pressure or high pressure order earth's poles?
north
Why is high pressure at the pole?
it is because air sinks at the poles
High pressure areas are created around the poles as cold air?
It RISES...
After high pressure areas are created around the poles cold polar air flows toward?
The low pressure area at the Equator.
What is subtropical high pressure?
it is found over the north and south poles
Why is there high air pressure at the poles?
Because cold air is denser than warm air.
After high pressure areas are created around the poles cold polar air flows toward what?
The South Pole
What causes two distinct pressure zones between equator and the poles?
The Earth's rotation turns the polar high pressure systems westward as they move from the poles (westerlies), and the subtropical high pressure systems eastward as they move toward the equator (tropical easterlies).
How does air travel at the poles?
The cold dense air at the poles sinks, so the air from the upper level of atmosphere flows in on the top of the increasing weight while creating an area of high pressure at the poles. Now, the air that rises at the equator does not flow directly to the poles.
What is prevailling westerlies?
The winds in the middle latitudes between 35 and 65 degrees are prevailing winds. They blow from the area's high pressure towards the poles.
