Huge Iceberg Breaks Off
from Greenland's Petermann Glacier
July 19, 2012
A NASA satellite has captured images of a huge iceberg breaking off from
one of the largest glaciers in the Arctic territory of Greenland.
image provided by NASA shows calving, crescent-shaped crack at center,
on the Petermann Glacier in northwestern Greenland. An iceberg twice the
size of Manhattan tore off one of Greenland's largest glaciers, July 19,
The iceberg, which measures twice the size of New York City's Manhattan
island (about 120 square kilometers), broke off Greenland's Petermann
Glacier earlier this week. Images from NASA's Aqua satellite showed the
iceberg separating from a floating river of ice called an ice tongue,
which is part of the mostly land-based glacier.
The initial rift in the ice was first detected in 2001.
This is the second time in two years that a massive iceberg has calved,
or broken off, from the Petermann Glacier. The iceberg that calved in
2010 was twice the size of the one that broke off this week.
Glaciers calve icebergs normally, but the frequency and size of the
icebergs have raised concerns among scientists that climate change is a