The outlines show the maximum horizontal displacement of a radiotracer (sodium-24) following its release at 8-m (26-ft) depth in Stewart's Dark Lake, Wisconsin. The numbers indicate the hours elapsed after release.
Clouds as photographed by meteorological satellites. (a) A garden of thunderstorms, showing the anvils, forming at the tropopause inversion. (b) A hurricane, showing the eye. (c) Convective cloud over land and sea-breeze clouds.