TERMIUM Plus®

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HOMOSPHERE [1 record]

Record 1 2004-12-06

English

Subject field(s)
  • Atmospheric Physics
  • Geophysics
  • The Earth (Astronomy)
DEF

Atmospheric region lying between the Earth's surface and a height of 80 km, in which the composition of the atmosphere is almost constant apart from small variations in its minor constituents (CO2, O3 and H2O).

CONT

Homosphere [is] the lower of two portions of the atmosphere as distinguished by the general homogeneity of their composition (the other portion is the heterosphere); it extends from the surface to an altitude of 80 to 100 kilometers above the earth, closely coinciding with the neutrosphere, and is characterized by uniformity of composition.

CONT

... above the homosphere (sometimes called the turbosphere) is the heterosphere.

OBS

Most authors use the term "turbosphere" in the sense of "homosphere"; thus they may be considered synonyms. However, if "turbosphere" is considered strictly based upon the atmospheric division, they are not synonnyms. The turbosphere pertains to the dynamical process distribution: turbosphere, diffusosphere and exosphere and the hemosphere to the composition distribution: homosphere and heterosphere.

OBS

Based on atmospheric characteristics (temperature, dynamical process, particle distribution, chemical composition, ionization, etc.), the atmosphere can be divided into different layers.

French

Domaine(s)
  • Physique de l'atmosphère
  • Géophysique
  • Terre (Astronomie)
DEF

Région de l'atmosphère s'étendant de la surface terrestre à une altitude de 80 km, dans laquelle la composition atmosphérique est presque constante, sauf de petites variations des constituants mineurs (CO2, O3 et H2O).

OBS

L'homosphère comprend la troposphère, la stratosphère, la mésosphère et la thermosphère. Les principaux constituants (oxygène et hydrogène) y sont en proportions pratiquement constantes.

OBS

Homosphère, hétérosphère et mésosphère : divisions de l'atmosphère selon sa composition. Troposphère, stratosphère, mésosphère et thermosphère : divisions de l'atmosphère selon la température.

OBS

Cette zone s'étend sur une centaine de kilomètres (cinquante pour certains auteurs) dans l'atmosphère à partir de la surface terrestre.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Geofísica
  • Tierra (Astronomía)
DEF

Región de la atmósfera que se extiende entre la superficie de la Tierra y una altitud de 80 km, en la que la composición de la atmósfera es casi constante, si se exceptúan pequeñas variaciones en los componentes minoritarios (CO2, O3 y H2O).

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