Wind formation is primarily caused by temperature differences in the hemispheres, which create pressure differences in the atmosphere. Here's how it works:
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Temperature Differences: Different areas on Earth receive varying amounts of solar energy, leading to temperature differences. For example, the equator receives more direct sunlight compared to the poles.
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Pressure Differences: These temperature differences cause variations in air pressure. Warm air rises, creating a low-pressure zone, while cooler air sinks, creating a high-pressure zone.
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Air Movement: Air moves from areas of high pressure to areas of low pressure, resulting in wind. This movement is influenced by the Earth’s rotation and the Coriolis effect, which causes winds to curve rather than move in a straight line.
The other factors you mentioned, like the movement of Earth on its axis and the turning of circulating air currents, do play a role in the overall dynamics of wind patterns but are secondary to the primary cause of temperature differences leading to pressure variations. The constant density of air is not a direct cause of wind formation but is more of a characteristic of air that influences its behavior.