Question

Why do temperature increase rapidly after ionosphere?

Answer 1

Answer:

because of the absorption of high amounts of incoming high energy Cong from the solar radiation by UE atoms of nitrogen and oxygen. The top of the mesosphere is the coldest part of the atmosphere.

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Answer 2

Answer:The upper atmosphere is ionized by solar radiation. ... Ionization processes release energy which heat up the upper atmosphere. So temperature increases with height in the ionosphere region to the extent that by 150-200km, the Earth's atmosphere is extremely hot compared to surface temperatures.