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Jun Lao: "Re: halos in Philippines" (Jul 1, 19:08):
> Marko,
>
> Your skies in the north might be more conducive to more colorful
> displays since ice crystals should be (?) more common in your area -
> the mere fact that ice crystals exist here in the tropics raises more
> than a few eyebrows when I relate it to my officemates.
Actually, the tropical tropopause is colder than polar tropopause. This
can be explained by the fact that the tropical tropopause is in much
higher altitude, near 15 kilometers, compared to about 8 kilometer of
polar tropopause.
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