Turbopause
Theturbopause,also called thehomopause,marks the altitude in an atmosphere below whichturbulent mi xingdominates. Mathematically, it is defined as the point where the coefficient ofEddy diffusionis equal to the coefficient ofmolecular diffusion.[1]The region below the turbopause is known as thehomosphere,where the atmosphere is well mixed for chemical species which have longmean residence times.Highly reactive chemicals tend to have variable concentration throughout the atmosphere, while unreactive species have more homogeneous concentrations. The region above the turbopause is theheterosphere,wheremolecular diffusiondominates and the chemical composition of the atmosphere varies according to chemical species and their atomic weight.
Earth'sturbopause lies near themesopause,at the intersection of themesosphereand thethermosphere,at an altitude of roughly 90 km (56 mi).[2]Some other turbopauses in theSolar Systemthat are known includeVenus'turbopause at about 130–135 km (81–84 mi),Mars'at about 130 km (81 mi),Jupiter'sat roughly 385 km (239 mi), andTitan'sat around 800–850 km (500–530 mi).[3]
It was discovered byFrench scientistsfollowing the firing of twoVéroniquesounding rockets on 10 and 12 March 1959.[4]
References[edit]
- "The Atmosphere".web.haystack.mit.edu.Archived fromthe originalon 8 November 2005.
- Specific
- ^Atreya, Sushil K. (1986). "Vertical Mi xing". In Atreya, Sushil K. (ed.).Atmospheres and Ionospheres of the Outer Planets and Their Satellites.Physics and Chemistry in Space. Vol. 15.SpringerBerlinHeidelberg.pp. 66–79.doi:10.1007/978-3-642-71394-1_4.ISBN9783642713941.
- ^"turbopause".AMS Glossary (glossary.ametsoc.org).American Meteorological Society.Retrieved2019-06-01.
- ^Catling, David; Kasting, James (2017).Atmospheric Evolution on Inhabited and Lifeless Worlds?.Cambridge University Press.p. 6.ISBN9780521844123.
- ^Varnoteaux, Philippe."Il y a 60 ans, Véronique AGI emmenait la France dans l'espace – PARTIE 1: La campagne de tirs"(in French).Retrieved2019-08-31.
