Geography Insolation and Temperature - 5 (in Hindi)

Lesson 5 of 5 • 26 upvotes • 11:20mins

R K Shukla

UPSC/ MPPSC SPECIAL GEOGRAPHY LECTURE part 5 Heat budget The earth as a whole does not accumulate or lose heat. It maintains its temperature. This can happen only if the amount of heat received in the form of insolation equals the amount lost by the earth through terrestrial radiation. This balance between the insolation and the terrestrial radiation is termed as the heat budget or heat balance of the earth. This is why the earth neither warms up nor cools down despite the huge transfer of heat that takes place. Albedo can be simply defined as a measure of how much light that hits a surface is reflected back without being absorbed. It is a reflection coefficient and has a value less than one. When the solar radiation passes through the atmosphere, some amount of it is reflected, scattered and absorbed. The reflected amount of radiation is called as the albedo of the earth.