写真

Photographer's Note

This photo depicts a Polar stratospheric cloud (Nacreous cloud), Wich can often be seen in the cold (very cold) and dry icelandic winter afternoons (or dawns). Those are dry crystallized clouds in the stratosphere (17-50 km above earth), wich reflect sunlight differently than the normal ones. Due to their christallization, and different shape (of the christallized water) the light rays get bent and that changes their frequenzy, causing us to see them as differnt colours. The clouds temperature is about -90ーC, -130ーF.
Found in the polar regions of earth, witnessing those phenomenons is a spectacular experience.

The clouds are found high enough, up in the atmosphere, that the sun can light them, even though it's below the horizon.

leonine53, catalina, Buin, Karitsiotis, AandK has marked this note useful

Photo Information
  • Copyright: Johann Gunnarsson (joi_franski) (43)
  • Genre: 場所
  • Medium: カラー
  • Date Taken: 2004-12-21
  • Camera: Kodak DX7590
  • Exposure: f/2.8, 1/50 seconds
  • Details: Tripod: Yes
  • Photo Version: Original Version, Workshop
  • Date Submitted: 2006-01-18 4:49
Viewed: 1805
Points: 10
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