Seasonal temperature variations can be explained in terms of the latitudinal and seasonal variations in the surface energy balance. The pattern of temperatures is a function of net short-wave radiation, net long-wave radiation, sensible heat flux, latent heat flux, and change in heat storage. Note that the highest temperatures occur not at the equator landmasses, where it is often cloudy, but at 20 degrees north and south of the equator along zones of semi-permanent high pressure zones where skies are generally clear. The animation can be paused and rewound to emphasize important points.
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