The Sun is the primary energy source that drives the Earth’s climate system. While some of the radiation emitted from the Sun is reflected back into space, a large portion… Click to show full abstract
The Sun is the primary energy source that drives the Earth’s climate system. While some of the radiation emitted from the Sun is reflected back into space, a large portion is absorbed by the Earth’s atmosphere and surface. Part of the longwave radiation re-emitted from the Earth is absorbed by radiatively active gases in the atmosphere—a phenomenon called the “greenhouse effect.” This effect causes the Earth’s surface temperature to be 33°K warmer than it would be without these gases. All parts of the Earth’s climate system, including the hydrological cycle and atmospheric circulation, are driven by energy input
               
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