23 Feb '12, 2am

Iceberg shards & ghostly tendrils stream from an Antarctic ice shelf: cool image from our EO-1 satellite.

Off the northeastern edge of Antarctica’s Amery Ice Shelf lies Mackenzie Bay, which was painted with a ghostly blue-green mass in early February 2012. Similarly colored tendrils also streamed northward across the ocean, their flow sometimes interrupted by icebergs. Multiple factors might account for the ghostly shapes, including low-lying clouds or katabatic winds —downslope winds blowing toward the coast, which can freeze the water at the ocean surface. But an intriguing and perhaps more likely explanation involves processes occurring below the ice shelf. An ice shelf is a thick slab of ice often fed by glaciers attached to the coastline. The shelf floats on the ocean surface, with seawater circulating underneath. Like most ice shelves, the Amery is very thick in the upstream area near the shore. It thins significantly as it stretches northward away from the continent. Wa...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=77207

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Mackenzie Bay, Antarctica [image] #NASA

earthobservatory.nasa.gov 22 Feb '12, 11pm

Off the northeastern edge of Antarctica’sAmery Ice Shelf lies Mackenzie Bay, which was painted with a ghostly blue-green m...

Amery Ice Shelf [image] #NASA

earthobservatory.nasa.gov 11 Feb '12, 11pm

Several glaciers in East Antarctica, including the Lambert Glacier, share the same route to the ocean through the Amery Ic...

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earthobservatory.nasa.gov 11 Feb '12, 11pm

Several glaciers in East Antarctica, including the Lambert Glacier, share the same route to the ocean through the Amery Ic...

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earthobservatory.nasa.gov 11 Feb '12, 11pm

Several glaciers in East Antarctica, including the Lambert Glacier, share the same route to the ocean through the Amery Ic...

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