ozone stratosphérique

CONT: Le problème du «trou dans la couche de bon ozone» stratosphérique (12 à 41 km d'altitude environ) est attribué semble-t-il aux CFC(1) et au N [indice 2] O.
OBS: L'O [indice 3] stratosphérique n'est pas considéré comme un gaz à effet de serre, contrairement à l'O [indice 3] troposphérique. En règle générale, on partage l'ozone troposphérique de l'ozone stratosphérique à partir de 12 km d'altitude.

CONT: While the total amount of ozone in the troposphere is small compared with stratospheric ozone, it is important in considering the energy balance of the atmosphere. At the lower levels of the atmosphere, ozone is at higher pressures and its absorption of outgoing infrared radiation is very much more effective than higher-level ozone.
OBS: About 90% of the total ozone is found in the stratosphere.
OBS: A gas essential to life on Earth as it screens out solar UV radiation.

CONT: O ozônio estratosférico é o componente chave na absorção da radiação ultravioleta, protegendo a vida contra os efeitos nocivos desta radiação.