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[–] 21 points 6 months ago

Clouds.

  • polar stratospheric clouds play an important role in creating the ozone hole
  • the highest clouds on earth are about 80 km high
  • in the mid-latitudes most rain is cold rain, that means it leaves the clouds as ice and melts on the way down
  • pure water droplets without an aerosol inside (cloud condensation nucleus) freeze at about -40°C, sea salt aerosols make cloud droplets freeze at about -38°C, …

And there’s much more to be found.

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