The Aeronomy (pronounced A- eronomie ) is the physics of the upper atmosphere or upper atmosphere. While the physics of the lower atmosphere since Aristotle is known as meteorology, the name was Aeronomy of the physics of the upper atmosphere in 1954 set at the meeting of the International Union of Geodesy and Geophysics in Rome. The Aeronomy is a branch of geophysics. Sometimes the Aeronomy is also attributed as a branch of meteorology, excluded from this other times. This depends on whether by " Meteorology" only the meteorology in the narrower sense is meant those already mentioned physics of the lower atmosphere; or whether the concept of Meteorology relates generally to the physics of the entire global atmosphere.
Local viewing areas of the Aeronomy
The terms upper atmosphere and upper atmosphere are not sharply defined. However, the atmosphere at a height of about 50 km is mostly meant for use in connection with the term Aeronomy.
Practical and Theoretical reasons for this level choice
From a practical point of view, about 50 km in the upper limit of traditional sensing methods using hot air ballooning dar. Higher areas were not available before the introduction of rockets, and therefore remained the observation by indirect methods reserved. From a theoretical perspective, the atmosphere up to an altitude of about 50 km is always well mixed, and therefore has a nearly constant basic chemical composition. Above 50 km of this basic composition begins to change with altitude, with lighter elements with increasing height predominate. Also occurs from approximately the same height range for the first time a significant ionization of the atmospheric gas mixture to whose influence on various other physical properties of the gas with the height also increases.
See also: Aerology, Max Planck Institute for Aeronomy