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Posts Tagged ‘icebergs’

Japan tsunami broke huge icebergs off Antarctica

August 9, 2011 Comments off

thewatchers

The massive March 11 Japan earthquake and its ensuing tsunami were so powerful that they broke off huge icebergs thousands of miles away in Antarctica, according to a new study.

The calving of icebergs (where a huge chunk of ice breaks off from a glacier or ice shelf) from the Sulzberger Ice Shelf in Antarctica was linked to the tsunami, which originated with the magnitude 9.0 earthquake off the coast of the Japanese island of Honshu, by satellite observations of the Antarctic coast immediately after the earthquake.

Icebergs have been reported to calve following earthquakes before, including after the magnitude 6.3 earthquake that struck Christchurch, New Zealand, on Feb 22. But the new finding marks the first direct observation of such a connection between tsunamis and iceberg calving.

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Rapid Greenland Glacial Melt Shown By ESA Satellite

July 20, 2011 Comments off

nanopatentsandinnovations

Some of the last images from ESA’s ERS-2 satellite have revealed rapidly changing glacial features in Greenland. In its final days, the veteran satellite gave us frequent views of the Kangerdlugssuaq glacier and its advancing ice stream.

Kangerdlugssuaq ice stream
Kangerdlugssuaq ice stream
Credit: ESA

Before it retired on 6 July, ESA’s ERS-2 Earth observation satellite entered an orbit to capture radar images of the same area on the ground every three days, rather than its previous 35-day cycle.

Images of the Kangerdlugssuaq glacier in eastern Greenland taken from March to May 2011 show that the ice stream was Read more…