A wind system refers to the movement of air in the atmosphere, driven by differences in temperature and pressure. These differences occur due to the uneven heating of the Earth's surface by the sun. As warm air rises, cooler air moves in to replace it, creating wind. Wind systems can be local, like breezes, or global, such as the trade winds and jet streams. These systems play a crucial role in weather patterns and climate, influencing everything from hurricanes to monsoons. Understanding wind systems helps meteorologists predict weather changes and patterns.