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Record 1 1989-11-03

English

Subject field(s)
  • Air Pollution
  • Atmospheric Physics
CONT

If the temperature of the atmosphere has a vertical gradient equal to the adiabatic lapse unit of -5.4 degrees F/1000 ft, the atmosphere is said to be neutral.

OBS

[There are] three broad categories of atmospheric stability: unstable, neutral and stable conditions. The neutral condition has a temperature decrease with height of about 10°C/Km (called the adiabatic lapse rate).

French

Domaine(s)
  • Pollution de l'air
  • Physique de l'atmosphère
CONT

[...] avec l'accroissement des puissances d'émission on observe parfois, en atmosphère neutre surmontée d'une inversion, des arrivées de panache au sol même, à proche distance de la cheminée [...]

CONT

Cas d'une atmosphère indifférente. La concentration des polluants est la même dans toutes les directions à partir du centre d'émission : elle décroît régulièrement quand on s'éloigne de ce centre. On a un panache conique (coming).

Spanish

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