Coloured satellite image of the hole in the ozone layer above Antarctica. Blue indicates low ozone levels. Green,orange and yellow represent higher ozone levels. The ozone hole is a seasonal phenomenon that occurs during the Antarctic spring (August and September). Polar winds keep cold air trapped above the continent,and reactions between ice clouds,sunlight and man-made chlorine degrades the ozone layer of the atmosphere. Levels of ozone-damaging chemicals have fallen since the 1987 Montreal Protocol. Image taken by NASA's Aura satellite on 16th September 2013 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NASA's Goddard Space Flight Center |
Bildgröße: | 1800 px × 1963 px |
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Eigentums-Rechte: | nicht erforderlich |
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