Rainfall calms storms

Nature: Rainfall soothes the atmosphere, atmospheric scientists have found. They calculate that a substantial portion of the energy that drives wind and air circulation in the atmosphere is dissipated as friction by raindrops falling through the air. The atmosphere acts like a heat engine, generating mechanical energy by moving heat from Earth’s surface, where air has been warmed by the Sun, to the colder air above. Some of that becomes kinetic energy of air, driving movements ranging from large-scale......

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