Which of the following statements is are true with refrence to the structure of cyclones 1 Near the ...........

Geography Atmosphere

Which of the following statements is/are true with refrence to the structure of cyclones:

1. Near the center the pressure gradient force and the force from Coriolis effect must be in an approximate balance, or the cyclone would collapse on itself as a result of the difference in pressure.

2. Due to Magnetic effect of the Earth, wind flow around a large cyclone is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

Which of the statements given above is/are correct?

1 only

2 only

Both 1 and 2

Neither 1 Nor 2

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Explanation:

Cyclone is a large scale air mass that rotates around a strong center of low atmospheric pressure. Cyclones are characterized by inward spiraling winds that rotate about a zone of low pressure. The largest low-pressure systems are polar vortices and extratropical cyclones of the largest scale (the synoptic scale). Warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within the synoptic scale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the tropical upper tropospheric trough during the summer months in the Northern Hemisphere. The surface winds spiral inwards upon the centre of the cyclone because air descends at the centre of the cyclone. Because of the Coriolis effect, the wind flow around a large cyclone is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.