Fire Earth

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Posts Tagged ‘iceberg calving’

FIRE-EARTH Alert: Larsen C Calving in Antarctica

Posted by feww on January 7, 2017

Larsen C Ice shelf primed to shed 10% of its area –Researchers

Larsen C Ice shelf in Antarctica is primed to shed 10% of its area, or nearly 5,200 km² of ice.

  • Only 20 km of ice now connects an iceberg  half the size of Jamaica [“one quarter the size of Wales,”] to its parent ice shelf.
  • Fundamentally changing the landscape of the Antarctic Peninsula, the calving event will result in a new, less stable configuration for Larsen C,  one that could “eventually follow the example of its neighbour Larsen B, which disintegrated in 2002 following a similar rift-induced calving event,” according to researchers at Project Midas.
The current location of the rift on Larsen C, as of January 2017. Labels highlight significant jumps. Tip positions are derived from Landsat (USGS) and Sentinel-1 InSAR (ESA) data. Background image blends BEDMAP2 Elevation (BAS) with MODIS MOA2009 Image mosaic (NSIDC). Other data from SCAR ADD and OSM. Via Project Midas

The current location of the rift on Larsen C, as of January 2017. Labels highlight significant jumps. Tip positions are derived from Landsat (USGS) and Sentinel-1 InSAR (ESA) data. Background image blends BEDMAP2 Elevation (BAS) with MODIS MOA2009 Image mosaic (NSIDC). Other data from SCAR ADD and OSM.

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PIG Calves a Massive Iceberg

Posted by feww on July 9, 2013

Pine Island glacier (PIG) spawns a huge iceberg in the Antarctic

The iceberg measures about 720 sq km, or eight times the size of Manhattan Island, said a report.

PIG
Credit DLR – Image taken by TerraSAR-X, Germany’s Earth-observation satellite.

The large crack spreading across the “longest and fastest flowing glacier” in the west Antarctic was first observed in October 2011.

“The PIG is the most rapidly shrinking glacier on the planet,” said a researcher.

“It’s losing more ice than any other glacier on the planet, and it’s contributing to sea level rise faster than any other glacier on the planet.”

The speed of Pine Island Glacier increased by 73 percent between 1974 and  2007. As a result, PIG had a negative mass balance of 46 gigatons per year, that is the glacier system drained more water into the sea than replaced by snowfall, researchers say.

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