EARTH SCIENCE > ATMOSPHERE > ALTITUDE > MESOPAUSE
The top of the mesosphere and the base of the thermosphere.
The mesopause is usually located at heights of 85¿95 km, and is the site of
the coldest temperatures in the atmosphere. Temperatures as low as 100 K
(− 173¿C) have been measured at the mesopause by rockets.
The Glossary of Meteorology Online http://amsglossary.allenpress.com/