The large-scale movement of the atmosphere, including the tropical Hadley cell and the midlatitude Ferrel cell.
Named after William Ferrel, the thermally indirect middle-latitude mean atmospheric overturning: near-surface flow is poleward and the upper return equatorward. It is maintained largely by eddy forcing and surface stress. Its Eulerian mean thermal transport can oppose the poleward eddy contribution; it is not a second thermally direct Hadley cell.
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Atmospheric circulation refers to the large-scale movement of air in the Earth's atmosphere, which is driven by differences in solar heating and the rotation of the Earth. This circulation is fundamental to weather patterns and climate systems around the globe. The primary features of atmospheric circulation include: 1. **Hadley Cells**: These are tropical atmospheric circulation cells that extend from the equator to about 30 degrees latitude.