Icebergs are mostly white because the ice is full of tiny air bubbles.
The bubble surfaces reflect white light giving the iceberg an overall
white appearance. Ice that is bubble free has a blue tint which is due
to the same light phenomenon that tints the sky. The blueish streaks of clear, bubble free ice often seen in icebergs
results from the refreezing of meltwater which fills crevasses formed in
the glacier as it creeps over land. The ice is blue because of the
natural light scattering characteristics of pure ice. Occasionally
airborne dust or dirt eroded from land ends up on the glacier surface
eventually forming a noticeably darkened brown or black layer within the ice of a floating iceberg. Black ice is also of high density and bubble free.
 |
| Jökulsárlón, Iceland. Photo by Teatsche on Flickr |
 |
| Jökulsárlón, Iceland. Photo by Teatsche on Flickr |
 |
Jökulsárlón, Iceland. Photo by josche on Flickr
|
 |
Jökulsárlón, Iceland - LINK
|
 |
| Jökulsárlón, Iceland. Photo by Teatsche on Flickr |
No comments:
Post a Comment