BPSC (Bihar) Exam > BPSC (Bihar) Questions > The atmosphere is mainly heated by thea)long-...
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The atmosphere is mainly heated by the
- a)long-wave terrestrial radiation
- b)short-wave solar radiation
- c)reflected solar radiation
- d)More than one of the above
- e)None of the above
Correct answer is option 'A'. Can you explain this answer?
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The atmosphere is mainly heated by thea)long-wave terrestrial radiatio...
Understanding Atmospheric Heating
The heating of the Earth's atmosphere is a complex process influenced by several factors, but the primary mechanism is related to long-wave terrestrial radiation.
Key Mechanisms of Atmospheric Heating
- Long-Wave Terrestrial Radiation
- The Earth's surface absorbs solar energy during the day and re-emits it as long-wave infrared radiation.
- This long-wave radiation is absorbed by greenhouse gases in the atmosphere, such as carbon dioxide and water vapor, which effectively warms the air.
- Short-Wave Solar Radiation
- While short-wave solar radiation is crucial for warming the Earth's surface, it primarily heats the ground and oceans.
- Some of this energy is eventually converted to long-wave radiation, which then warms the atmosphere.
- Reflected Solar Radiation
- Not all solar radiation reaches the Earth; a portion is reflected back into space by clouds, aerosols, and the Earth's surface.
- This reflected radiation does not contribute to atmospheric heating as it does not provide energy for warming.
Conclusion
In summary, while solar radiation is essential for heating the Earth, it is the long-wave terrestrial radiation that predominantly warms the atmosphere. This process underscores the importance of greenhouse gases in regulating the Earth's climate and maintaining temperatures suitable for life. Hence, the correct answer to the question is option 'A', as long-wave terrestrial radiation plays a pivotal role in heating the atmosphere.
The heating of the Earth's atmosphere is a complex process influenced by several factors, but the primary mechanism is related to long-wave terrestrial radiation.
Key Mechanisms of Atmospheric Heating
- Long-Wave Terrestrial Radiation
- The Earth's surface absorbs solar energy during the day and re-emits it as long-wave infrared radiation.
- This long-wave radiation is absorbed by greenhouse gases in the atmosphere, such as carbon dioxide and water vapor, which effectively warms the air.
- Short-Wave Solar Radiation
- While short-wave solar radiation is crucial for warming the Earth's surface, it primarily heats the ground and oceans.
- Some of this energy is eventually converted to long-wave radiation, which then warms the atmosphere.
- Reflected Solar Radiation
- Not all solar radiation reaches the Earth; a portion is reflected back into space by clouds, aerosols, and the Earth's surface.
- This reflected radiation does not contribute to atmospheric heating as it does not provide energy for warming.
Conclusion
In summary, while solar radiation is essential for heating the Earth, it is the long-wave terrestrial radiation that predominantly warms the atmosphere. This process underscores the importance of greenhouse gases in regulating the Earth's climate and maintaining temperatures suitable for life. Hence, the correct answer to the question is option 'A', as long-wave terrestrial radiation plays a pivotal role in heating the atmosphere.
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The atmosphere is mainly heated by thea)long-wave terrestrial radiatio...
Terrestrial Radiation:
- The insolation received by the earth is in the form of shortwaves.
- The earth after being heated itself becomes a radiating body and it radiates energy to the atmosphere in the long waveform.
- This energy heats up the atmosphere from below.
- This process is known as terrestrial radiation.
- Longwave radiation is absorbed by atmospheric gases, particularly by carbon dioxide and other greenhouse gases.
- Thus, the atmosphere is indirectly heated by the earth’s radiation.
- The atmosphere in turn radiates and transmits heat to space.
- 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.
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The atmosphere is mainly heated by thea)long-wave terrestrial radiationb)short-wave solar radiationc)reflected solar radiationd)More than one of the abovee)None of the aboveCorrect answer is option 'A'. Can you explain this answer?
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