How is blue ice formed?
the ice is always colorless
in the upper atmosphere
in the depths of the glacier
from salt sea water
Blue ice occurs under the surface of a glacier as a result of repeated, slow thawing and freezing of water. This process speeds up when snow falls on the top of a glacier, the ice compresses, air bubbles are squeezed out and ice crystals enlarge, making the ice appear blue. In the Greenland environment this process takes from 100 up to 150 years.
reach: rather globalAntarcticAntarcticaArcticGreenlandicewater
Answers by country
the ice is always colorless
in the upper atmosphere
in the depths of the glacier
from salt sea water
answers
Republic of Ireland24
Australia12
Germany36
the United States58
the United Kingdom60
India18
Poland3637