publication . Article . 1999

Vertical circulation and thermospheric composition: a modelling study

H. Rishbeth; Ingo Müller-Wodarg;
Open Access
  • Published: 01 Jun 1999 Journal: Annales Geophysicae, volume 17, pages 794-805 (eissn: 1432-0576, Copyright policy)
  • Publisher: Copernicus GmbH
Abstract
<jats:p>Abstract. The coupled thermosphere-ionosphere-plasmasphere model CTIP is used to study the global three-dimensional circulation and its effect on neutral composition in the midlatitude F-layer. At equinox, the vertical air motion is basically up by day, down by night, and the atomic oxygen/molecular nitrogen [O/N2] concentration ratio is symmetrical about the equator. At solstice there is a summer-to-winter flow of air, with downwelling at subauroral latitudes in winter that produces regions of large [O/N2] ratio. Because the thermospheric circulation is influenced by the high-latitude energy inputs, which are related to the geometry of the Earth's magne...
Persistent Identifiers
Subjects
arXiv: Physics::GeophysicsPhysics::Space PhysicsPhysics::Atmospheric and Oceanic PhysicsAstrophysics::Earth and Planetary Astrophysics
free text keywords: Earth and Planetary Sciences (miscellaneous), Space and Planetary Science, Astronomy and Astrophysics, Atmospheric Science, Geology, Atmospheric sciences, Thermosphere, Downwelling, Atmosphere, Solstice, Ionosphere, Latitude, Equator, Middle latitudes, lcsh:Science, lcsh:Q, lcsh:Physics, lcsh:QC1-999, lcsh:Geophysics. Cosmic physics, lcsh:QC801-809
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