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May 31, 2008

Iceberg art

*WARNING: EDUCATIONAL CONTENT

Blue stripes are often created when a crevice in the ice sheet fills up with meltwater and freezes so quickly that no bubbles form. When an iceberg falls into the sea, a layer of salty seawater can freeze to the underside. If this is rich in algae, it can form a green stripe. Brown, black and yellow lines are caused by sediment, picked up when the ice sheet grinds downhill towards the sea.

So enjoy them while you can; pretty soon global warming (que dramatic scary music and people creaming) will render images like these a thing of the past.




1 comment:

  1. Really stunning photographs, God knows I hate the cold but that's almost an incentive to see it in person.

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