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Effet des émissions à effet de serre sur l'ozone stratosphérique.

The effect of greenhouse emissions on the ozone layer.

Auteurs : VELDERS G.

Type d'article : Article

Résumé

Damage to the ozone layer is principally caused by increase in emissions of such chlorine and bromine compounds as CFCs, halons, etc. The contribution due to emissions of other compounds is usually neglected, while methane, nitrous oxide and carbon dioxide do in fact influence the ozone layer, either directly or indirectly. The increase in methane concentration on top of the increase of CFCs has led to a reduction in the damage to the ozone layer of +1.4% between 1980 and 1990. An increase in the HCl reservoir has been responsible for this reduction. It has been calculated that the increase of nitrous oxide between 1980 and 1990 has resulted in a slight reduction of ozone breakdown of +0.1%. CO2 does not have any direct chemical effect on the ozone layer; it exerts its influence via temperature change.

Détails

  • Titre original : The effect of greenhouse emissions on the ozone layer.
  • Identifiant de la fiche : 1999-0603
  • Langues : Anglais
  • Sujet : Environnement, Généralités
  • Source : Change - n. 39
  • Date d'édition : 11/1997
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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