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Polar Stratospheric Clouds - Nacreous Clouds 3

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Nacreous Clouds - Antarctica

Nacreous Clouds or Polar Stratospheric Clouds.

As the clouds are so high they can often receive light from below the horizon due to the curvature of the earth so appearing very bright at dusk or dawn.

These pictures were taken in the Antarctic winter when the sun didn't appear above the horizon for long and much of the time any natural light was twilight. The winter gives ideal conditions for the formation of such clouds and also for observation of such clouds.

Picture taken 23/08/2009 12.41 - McMurdo Antarctica.

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This picture published courtesy of Alan Light - This picture is in the public domain.

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