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LOWER ATMOSPHERE [1 record]

Record 1 2004-10-29

English

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

That part of the atmosphere (i.e. the troposphere and lower stratosphere) in which most weather phenomena occur.

CONT

What is the lower atmosphere? The troposphere is the layer of neutral atmosphere from the Earth's surface up to the tropopause at around 10 kilometers. The stratosphere is the layer of neutral atmosphere from around 10 kilometers to around 50 kilometers above the Earth's surface, the temperature increasing steadily due to absorption of UV radiation by ozone. It is in these regions that weather patterns occur.

CONT

Ozone does occur naturally in the lower atmosphere (troposphere), but only in relatively low background concentrations of about 30 parts per billion (ppb) ...

OBS

The boundaries of the lower atmosphere vary among authors.

OBS

lower atmosphere: ... used in contrast to the common meaning for the upper atmosphere. In other contexts, the term implies the lower troposphere.

OBS

lower atmosphere: term standardized by ISO.

French

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

Partie de l'atmosphère située au-dessous de la haute atmosphère.

CONT

Ainsi, le domaine de la basse atmosphère s'identifie à la troposphère, riche en vapeur d'eau et en nuages, et au sein de laquelle la température décroît dans l'ensemble assez régulièrement avec l'altitude.

OBS

Les limites de la basse atmosphère varient énormément d'un auteur à l'autre; il s'agit d'un terme qui sert à désigner commodément et sans trop de précision la région située sous celle qui présente de l'intérêt pour un auteur donné. De façon générale, la basse atmosphère commence sous la tropopause.

OBS

basse atmosphère : terme normalisé par l'ISO.

Spanish

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