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Which phrase characterizes a low-pressure system in the Northern Hemisphere?

A. Warm, rising air that cools as it expands into higher altitudes
B. Air that spirals out clockwise at low levels
C. A system usually associated with clear, dry conditions
D. A system containing cooling air that is becoming denser and heavier

Answer :

Low-pressure systems in the Northern Hemisphere have warm, rising air and cyclonic circulation.

What defines Northern Hemisphere low-pressure systems?

Low-pressure systems in the Northern Hemisphere are associated with the upward movement of air, where warm air rises and cools as it reaches higher altitudes. This cooling leads to condensation and the formation of clouds, often resulting in precipitation.

As the warm air rises, it creates a counterclockwise rotation known as cyclonic circulation. This means that the air spirals inward and upward, resulting in a convergence of air at the center of the low-pressure system.

The characteristics of low-pressure systems in the Northern Hemisphere differ from those in the Southern Hemisphere due to the Coriolis effect.

In the Northern Hemisphere, the Coriolis effect causes the air to rotate counterclockwise, while in the Southern Hemisphere, it rotates clockwise.

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