Thursday, November 12, 2015

Melting glaciers of Greenland could pose a major threat to Mankind


The melting glaciers of Greenland could pose a major threat to Mankind and this would be on the agenda when the world gets ready for the most important global climate summit yet in Paris later this month. The news from Greenland could add urgency to the negotiations because another major glacier appears to have begun a rapid retreat into a deep underwater basin.
This has been noticed at Greenland's Jakobshavn Glacier and also in the Amundsen Sea region of West Antarctica as reported in nzherald.co.nz dated 13 November 2015.
Warm ocean waters reaching the deep bases of marine glaciers appears to be a major cause for the melting. The new fast-moving glacier is the Zachariae glacier or Zachariæ Isstrøm - it is located in the far northeastern part of Greenland.
In a new paper in Science, Jeremie Mouginot of the University of California-Irvine and his colleagues have discovered that the ocean-based glacier, which contains 0.5 metres or a foot and a half of potential sea level rise, has begun a rapid retreat, especially since 2012.
The glacier has lost fully 95 percent of the ice shelf that used to help stabilize it and now sports a 75-metre high ice cliff extending above the water (the glacier also extends hundreds of additional meters below it).
NASA has estimated that currently, the Greenland ice sheet is losing several hundred billion tons (or gigatons) per year and that is raising sea levels by three quarters of a millimeter annually.
That is a dangerous trend.

(Image source wikimediacommons.org)

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