Atmospheric circulation refers to the large-scale movement of air in the Earth's atmosphere, driven by the uneven heating of the planet's surface by the Sun. This process creates wind patterns and influences weather systems, as warm air rises and cool air sinks, leading to the formation of high and low-pressure areas. These circulation patterns are organized into three main cells in each hemisphere: the Hadley Cell, Ferrel Cell, and Polar Cell. Together, they help distribute heat and moisture around the globe, affecting climate and weather conditions in different regions, from tropical storms to polar climates.