Sundogs in tundra along a trans-Alaska pipeline, during mid-winter

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Description:

This phenomenon is occurred by the reflection by crystal ice of the sunlight in air under cold, clear weather.

Credit:

Yongwon Kim , University of Alaska Fairbanks , Fairbanks - United States

Other images/videos by this photographer (1 images)

When:

Submitted on May 3, 2010

Sections:

Biogeosciences (89 images)

Camera:

Cannon

Model:

Mark-II

Comments:

Apart from the sundogs, a 22 deg halo is also very clear in this mage. Both sundogs (also called parhelia) and the 22 deg halo are caused by minimum deviation of sunlight through the 60 deg prism of ice crystals (in cirrus clouds usually), the former when the crystal plates are oriented horizontally, the latter when they are oriented randomly. So in this picture I would assume you have both randomly oriented and horizontally oriented plates. Nice photo!

Posted by Konstantinos Kourtidis on May 14, 2010 14:56

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