Question

Where is the biggest ozone hole?

Answer 1

Biggest ozone hole:

1. The ozone hole is the region where the ozone layer is the thinnest, located above Antarctica.
2. Antarctica has the biggest ozone hole.
3. The ozone hole over Antarctica develops each year between the end of August and the start of October.
4. In the Antarctic winter a unique atmospheric condition known as the polar vortex forms.
5. The polar vortex blocks warmer mid-latitude air from mixing with the air above the pole creating extremely cold polar air temperatures.
6. In this cold vortex, polar stratospheric ice crystals clouds form.
7. This unique atmospheric condition eventually allows the chlorine to be released from chlorine nitrate.
8. The ice crystals that make up polar clouds provide the reaction surfaces where chlorine nitrate reacts with water to form hypochlorous acid.
9. As soon as the sun rises in the Antarctic in August, chlorine stored in hypochlorous acid is freed by photolysis.
10. This freed chlorine causes ozone destruction.
11. Ozone densities drop rapidly, only to recover when the polar vortex breaks up.
12. The ozone hole does not block radiation that is damaging to all living creatures on the planet.
13. Recognizing the deleterious effects of ozone depletion, an international agreement known as the Montreal Protocol was signed in Montreal (Canada) in 1987 and went into force in 1989 to regulate the emission of compounds that deplete the ozone layer.