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Climat et atmosphère

Definition(s)

The depletion of the earth stratospheric ozone layer as a result of the catalytic destruction of ozone by atomic halogens. The main source of these halogen atoms in the stratosphere is photodissociation of man-made halocarbon refrigerants, solvents, propellants, and foam-blowing agents (CFCs, HCFCs, freons, halons). The earth's stratospheric ozone layer plays a critical role in absorbing ultraviolet radiation emitted by the sun. (Source: InforMEA/MMA based on Wikipedia)
The fragile shield of ozone is been damaged by chemicals released on earth. The main chemicals that are depleting stratospheric ozone are chlorofluorocarbons which are used in refrigerators, aerosols, and as cleaners in many industries, and halons, which are used in fire extinguishers. The damage is caused when these chemicals release highly reactive forms of chlorine and bromine. Over the past 30 years ozone levels over parts of Antarctica have dropped by almost 40% during some months and a 'hole' in ozone concentrations is clearly visible in satellite observations. (Source: GEMET/WRIGHT)

Hiérarchie

Related terms:
ozone hole
ozone layer

In other languages

Anglais
ozone layer depletion
Russe
разрушение озонового слоя
Espagnol
agotamiento de capa de ozono
Chinois, Simplifié
臭氧层损耗
Arabe
استنفاد طبقة الأوزون

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Multilateral environment agreements tagged with appauvrissement de la couche d'ozone

You can see below a list of multilateral environment agreements. Use the links on the right to view the content tagged with appauvrissement de la couche d'ozone. This includes official treaty texts, decisions, recommendations, and other related informational documents such as publications, annuals, meetings, documents or reports.
Convention de Vienne
Convention de Rotterdam