The part of the atmosphere that stretches between 10 KM and 50 KM above the Earth's surface at moderate latitudes.
1. Its temperature is stratified with cooler layers lower down and warmer layers higher up.
2. The word derives from the French stratosph貥, sphere of layers, which was coined by French meteorologist L鯮-Philippe Teisserenc de Bort (1855-1913) from the Latin stratus, a spreading out + the Greek sphaira, sphere.
3. It is above the troposphere and below the mesosphere.