The Stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. It is stratified in temperature, with warmer layers higher up and cooler layers farther down. This is in contrast to the troposphere near the Earth's surface, which is cooler higher up and warmer farther down. The border of the troposphere and stratosphere, the tropopause, is marked by where this inversion begins, which in terms of atmospheric thermodynamics is the equilibrium level. The stratosphere is situated between about 10 km (6 mi) and 50 km (30 mi) altitude above the surface at moderate latitudes, while at the poles it starts at about 8 km (5 mi) altitude.
an inhospitable environment for any living creature. Without a space
suit, a person’s body is exposed to a vacuum environment and he will be
dead in 14 secs.
Normally the atmosphere cools a few degrees with a rise in
altitude. Flying a jet at about 35,000 ft is typically where
temperatures drop off dramatically to -50F or even -70F
The cooling trend slows down as you enter the initial layer of
the stratosphere, which is never at an exact altitude. The
stratosphere just like any layer of the atmosphere starts and stops
at various heights depending on where you are on the planet. These
layers are temperature dependent. So Bobby McGee at the equator
will give a report on the altitude of the stratosphere which will
differ from Jenny McGoo's report because she lives at the North
Pole. These variations change with the seasons
So the reason the temperature actually increases as you climb
through the stratosphere is due to the ozone layer. Ozone molecules
absorb energy and give heat back to the stratosphere. Still, it's
very cold: 0 to -10F degrees.