Heating and cooling of the Earths atmosphere happen mainly due to 3 different processes. This article briefly covers information on the 3 important processes – Conduction, Convection and Advection. The information shared in this article will not only help in Civil Service Exam but also help in other competitive exams like banking PO, SSC, state civil services exams etc.
Aspirants would find this article very helpful while preparing for the IAS Exam.
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 Heating and Cooling of Atmosphere
- There are various ways of heating and cooling of the atmosphere.
- The earth after being warmed by insolation transfers the heat to the atmospheric layers in the long waveform.
Conduction
- The air in interaction with the land gets heated gradually and the upper layers in touch with the lower layers also get heated. This process is called conduction.
- This process takes place when two bodies of uneven temperature are in contact with one another, there is a flow of energy from the warmer to the cooler body.
- The heat transfer continues until both the bodies reach the same temperature or the contact is interrupted.
- This process is significant in heating the lower layers of the atmosphere.
Convection
- The air in contact with the earth upsurges vertically on heating in the form of currents and transfers the heat of the atmosphere.
- This vertical heating of the atmosphere is known as convection.
- The convective transfer of energy is limited only to the troposphere.
Advection
- The transfer of heat through the horizontal movement of air is called advection.
- The horizontal movement of the air is comparatively more significant than the vertical movement.
- Most of the diurnal variation in weather is caused by advection only in the middle latitudes.
- During summer in tropical regions predominantly in Northern India, local winds called ‘loo’ is the result of the advection process.
Heating and Cooling of Atmosphere (UPSC Notes):- Download PDF Here
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