The mesopause is the atmospheric boundary layer between the mesosphere and the thermosphere . Their position is defined by the second minimum of the atmospheric temperature profile. The mesopause lies at an altitude of approx. 80 to 85 km in summer and at an altitude of around 100 km in winter.
While the FAI sets the limit to space at 100 km (corresponding to the Kármán line ), according to a different definition of the US Air Force , this limit is already at a height of about 80 km (50 miles ) above the ground and therefore corresponds roughly the mesopause.
- Helmut Kraus: The Earth's Atmosphere: An Introduction to Meteorology. 3rd edition Springer-Verlag, Berlin / Heidelberg / New York 2004, ISBN 3-540-20656-6 , p. 141.