Mesosphere
Weather
The atmospheric shell between about 20 km and about 70 to 80 km, extending from the top of the stratosphere (the stratopause) to the upper temperature minimum that defines the mesopause (the base of the thermosphere).
Climate Change
Mesosphere The region of the atmosphere between about 50 km and 80-85 km, extending from the top of the stratosphere to the upper temperature minimum. It is characterized by a broad temperature maximum (near 0 °C) at its base, from which the temperature decreases to a minimum (about -90 °C) at the mesopause level.
Defense
The portion of the atmosphere from about 30 to 80 kilometers above the earth.