Which atmospheric layer is characterized by a decrease in temperature with increasing altitude and contains the coldest temperatures in the Earth’s atmosphere ?
Mesosphere
Temperature falls with height in two layers: the troposphere and the mesosphere. In the stratosphere and thermosphere it rises with height.
The mesosphere extends roughly from 50 km to 80-85 km. Temperature keeps falling in it and reaches about -90 °C near the mesopause, the coldest part of the atmosphere.
The troposphere also cools with height, but its minimum (about -57 °C at the tropopause) is warmer, so the layer with the coldest temperatures is the mesosphere.
Hence, Mesosphere.
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