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mesosphere


Quick Reference

1 Upper-atmospheric layer above the stratopause (at 50 km) through which temperature decreases with height up to about 80 km, where temperatures reach a minimum of about -90 °C. This level is the mesopause, an inversion above which temperatures rise again. See also atmospheric structure.

2 That part of the Earth underlying the asthenosphere. The term is no longer in current use in this sense.


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