Annette and Jon were touring in
Torres Del Paine National Park in Chile, Southern Patagonia when
they found an amazing site.
Here's the story in their own words: "When viewing the terminal
face of a glacier, typically you only see 10% of the glacier on the
surface. Calving, a natural occurrence where the glacier loses ice
from its' terminus, results in large free-floating chunks of ice.
This particular ice had broken off from the glacier the evening
before from underwater / lower portion of the glacier.
"Witnesses heard a cracking and a loud "boom," and then the ice
surfaced. We understand ice this large breaks off from under the
glacier approximately once a year and we were fortunate to be able
to photograph it. The ice is a very deep blue as it is deprived of
oxygen. Within 24 hours it will be white as the typical floating
ice pieces."
Click on the pictures for larger view
What is this?
It's Blue Ice. According to Wikipedia:
"Blue ice happens when snow falls on a glacier, is compressed and
then becomes part of a glacier that winds its way toward a body of
water. During its travels, all of the air bubbles that are trapped
in the ice are squeezed out, and the size of the ice crystals
increases, making it clear."
The ice is blue for the same reason water is blue. Namely, it is a
result of an overtone of a OH molecular stretch in the water which
absorbs light at the red end of the visible spectrum.
More Blue Ice pictures:
Thanks so much
Tony for the pictures! View more of his
photos.