The atmosphere is largely transparent to short wave solar radiation.The energy received by the earth is known as incoming solar radiation which in short is termed insolation.The earth’s surface receives most of its energy in short wavelengths.Thus, the atmosphere is mainly heated by the long wave terrestrial radiation. In the greenhouse effect, greenhouse gases absorb the terrestrial radiation and re-radiate the heat into the atmosphere thereby keeping it warm.The Earth gets heated due to the greenhouse effect. The earth does not heat up due to the short wave radiation it gets from the sun.Finally, the amount of heat received from the sun is returned to space, thereby maintaining a constant temperature at the earth’s surface and in the atmosphere.The atmosphere in turn radiates and transmits heat to the space.Thus, the atmosphere is indirectly heated by the earth’s radiation.The longwave radiation is absorbed by atmospheric gases particularly by carbon dioxide and other greenhouse gases.This process is known as terrestrial radiation.This energy heats up the atmosphere from below.The earth after being heated itself becomes a radiating body and it radiates energy to the atmosphere in the long waveform.The insolation received by the earth is in the form of shortwaves.The correct answer is Long wave terrestrial radiation.
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