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Mertz Glacier and Icebergs

Credits
NASA (Jesse Allen); Link: http://earthobservatory.nasa.gov

With its ice tongue pointing towards Australia and New Zealand, the Mertz Glacier in East Antarctica extends into the Southern Ocean. A glacier can “calve”, which means that pieces of ice break off and start to float in the open sea as icebergs. Often comprising an area of several square kilometres, sea currents make these giants cross the Antarctic for months or even years. However, as soon as they reach northern and warmer areas, they begin to melt.

 

Location: Mertz Glacier, East Antarctica
Picture taken on January 1, 2010
Sensor: EO-1 - ALI

 

Penguin Traces

Credits
NASA/GSFC; Link: http://earthobservatory.nasa.gov

The Antarctica emperor penguins are endangered. Due to the global temperature increase, the ice in the south will melt quickly and the birds will lose their natural habitat. Scientists use satellite images in order to investigate the number of penguins in the Antarctic. Since the penguins are hard to detect due to their black and white feathering, scientists look for their excrements. In the middle of the picture, you can see brown lines that cannot originate from the ice and thus must be organic: This so-called seabird guano clearly indicates the presence of a penguin colony.

Gletscher in der Antarktis

Credits
NASA (Jesse Allen, Robert Simmon); Link: http://earthobservatory.nasa.gov

The Matusevich Glacier in the Antarctic streams towards the east coast while pushing its way through a valley in the mountains. Its ice tongue has been constrained so far but once it reaches the end of the mountains, the ice spreads out and calves into the ocean. Afterwards, the undulations of the sea break the ice into small pieces that begin to flow into the open sea as icebergs.

 

Location: Antarctic

Picture taken on September 6, 2010

Sensor: EO-1 – ALI