Question

mesosphere has a high night shining clouds give reason
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Answer 1

Answer:

Noctilucent clouds, or night shining clouds, are tenuous cloud-like phenomena in the upper atmosphere of Earth. ... Recent studies suggest that increased atmospheric methane emissions produce additional water vapor once the methane molecules reach the mesosphere – creating, or reinforcing existing noctilucent clouds.

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Answer 2

Very strange, high altitude clouds called "noctilucent clouds" or "polar mesospheric clouds" sometime form in the mesosphere near the poles. These peculiar clouds form much, much higher up than other types of clouds. It is formed as much as 50 miles (80 km) above the Earth's surface. They're thought to be made of ice crystals that form on fine dust particles from meteors. Since atmospheric pressure decreases with altitude, the rising air expands.