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| q |
Long Antarctic winter (May through September)
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| è |
The stratosphere is cold enough to form PSCs
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| è |
PSCs deplete odd nitrogen (NO)
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| è |
Help convert unreactive forms of chlorine (ClONO2 and
HCl) into more
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reactive forms (such as Cl2).
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| è |
The reactive chlorine remains bound to the surface of
clouds particles.
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| è |
Sunlight returns in springtime (September)
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| è |
The sunlight releases reactive chlorine from the
particle surface.
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| è |
The chlorine destroy ozone in October.
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| è |
Ozone hole appears.
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| è |
At the end of winter, the polar vortex breaks down.
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| è |
Allow fresh ozone and odd nitrogen to be brought in from
low latitudes.
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| è |
The ozone hole recovers (disappears) until next October.
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