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The greenhouse effect is the process by which radiation from a planet’s atmosphere warms the planet’s surface to a temperature above what it would be without its atmosphere.
If a planet’s atmosphere contains radiatively active gases (i.e., greenhouse gases) the atmosphere will radiate energy in all directions. Part of this radiation is directed towards the surface, warming it. The downward component of this radiation โ that is, the strength of the greenhouse effect โ will depend on the atmosphere’s temperature and on the amount of greenhouse gases that the atmosphere contains.
On Earth, the atmosphere is warmed by absorption of infrared thermal radiation from the underlying surface (heated by the sun), absorption of shorter wavelength radiant energy from the sun, and convective heat fluxes from the surface. Greenhouse gases in the atmosphere radiate energy, some of which is directed to the surface and lower atmosphere. The mechanism that produces this difference between the actual surface temperature and the effective temperature is due to the atmosphere and is known as the greenhouse effect.
Earthโs natural greenhouse effect is critical to supporting life. Human activities, primarily the burning of fossil fuels and clearing of forests, have intensified the natural greenhouse effect, causing global warming.
The mechanism is named after a faulty analogy with the effect of solar radiation passing through glass and warming a greenhouse. The way a greenhouse retains heat is fundamentally different, as a greenhouse works by reducing airflow and retaining warm air inside the structure
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infra red radiation is absorbed.Hlo give me your WhatsApp no. my no.7004928092
Great job sir
easy step by step.. green house effect topic very good
thanks sir
sir ozone and water vapour b greenhouse gasses hain…kya ye b global warming k liye responsible hain?
sir btayein
nice bt needs to be more informed
thank you sir
why heat come in through green house gases but can not go out? due to green house gases heat should not b come in….๐
sir any lecture on cloud effect on atmosphere temperature. is available ,or not if yes please give link….
thnks
kya kya karna padega ki mera topic koi v n chute
awsm sir……
I have no words to voice m y opinions , for your lesson
is awesome.
are you sure so2 is not a green house gas …????
atmospheric lifetime of co2 is 50-200 years
very nice explanation sir…thank you…please complete whole environment series for upsc sir
you r too good vry polite
nice chapter sir ….i learnt essally by you teach ….
thanks Sir