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"A tabular iceberg can be seen on the right, floating among sea ice just off of the Larsen C ice shelf. The iceberg's sharp angles and flat surface indicate that it probably recently calved (split off) from the ice shelf," NASA reports.
less"A tabular iceberg can be seen on the right, floating among sea ice just off of the Larsen C ice shelf. The iceberg's sharp angles and flat surface indicate that it probably recently calved (split off) from the
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
NASA's Operation IceBridge uses a fleet of planes to collect images of the Earth's polar ice and monitor how a changing climate is impacting impacting the thickness, location and accumulation of ice.
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![The western edge of the famed iceberg A-68 (TOP R), calved from the Larsen C ice shelf, is seen from NASA's Operation IceBridge research aircraft, near the coast of the Antarctic Peninsula region, on October 31, 2017, above Antarctica. The massive iceberg was measured at approximately the size of Delaware when it first calved in July. NASA's Operation IceBridge has been studying how polar ice has evolved over the past nine years and is currently flying a set of nine-hour research flights over West Antarctica to monitor ice loss aboard a retrofitted 1966 Lockheed P-3 aircraft. According to NASA, the current mission targets 'sea ice in the Bellingshausen and Weddell seas and glaciers in the Antarctic Peninsula and along the English and Bryan Coasts.' Researchers have used the IceBridge data to observe that the West Antarctic Ice Sheet may be in a state of irreversible decline directly contributing to rising sea levels. The National Climate Assessment, a study produced every 4 years by scientists from 13 federal agencies of the U.S. government, released a stark report November 2 stating that global temperature rise over the past 115 years has been primarily caused by 'human activities, especially emissions of greenhouse gases'. (Photo by Mario Tama/Getty Images) Photo: Mario Tama, Getty Images]()
The western edge of the famed iceberg A-68 (TOP R), calved from the Larsen C ice shelf, is seen from NASA's Operation IceBridge research aircraft, near the coast of the Antarctic Peninsula region, on October 31, 2017, above Antarctica. The massive iceberg was measured at approximately the size of Delaware when it first calved in July. NASA's Operation IceBridge has been studying how polar ice has evolved over the past nine years and is currently flying a set of nine-hour research flights over West Antarctica to monitor ice loss aboard a retrofitted 1966 Lockheed P-3 aircraft. According to NASA, the current mission targets 'sea ice in the Bellingshausen and Weddell seas and glaciers in the Antarctic Peninsula and along the English and Bryan Coasts.' Researchers have used the IceBridge data to observe that the West Antarctic Ice Sheet may be in a state of irreversible decline directly contributing to rising sea levels. The National Climate Assessment, a study produced every 4 years by scientists from 13 federal agencies of the U.S. government, released a stark report November 2 stating that global temperature rise over the past 115 years has been primarily caused by 'human activities, especially emissions of greenhouse gases'. (Photo by Mario Tama/Getty Images)
lessThe western edge of the famed iceberg A-68 (TOP R), calved from the Larsen C ice shelf, is seen from NASA's Operation IceBridge research aircraft, near the coast of the Antarctic Peninsula region, on October
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Giant tabular icebergs surrounded by ice floe drift in Vincennes Bay in the Australian Antarctic Territory on January 11, 2008. Australia's CSIRO's atmospheric research unit has found the world is warming faster than predicted by the United Nations' top climate change body, with harmful emissions exceeding worst-case estimates.
lessGiant tabular icebergs surrounded by ice floe drift in Vincennes Bay in the Australian Antarctic Territory on January 11, 2008. Australia's CSIRO's atmospheric research unit has found the world is warming
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"A tabular iceberg can be seen on the right, floating among sea ice just off of the Larsen C ice shelf. The iceberg's sharp angles and flat surface indicate that it probably recently calved (split off) from the ice shelf," NASA reports.
less"A tabular iceberg can be seen on the right, floating among sea ice just off of the Larsen C ice shelf. The iceberg's sharp angles and flat surface indicate that it probably recently calved (split off) from the
... more
Perfectly rectangular iceberg spotted by NASA is an object of geometric perfection
A remarkable rectangular iceberg with sharp edges and a smooth surface looks as if it were deliberately cut by a machine, but NASA scientists say it's a product of Mother Nature.
The space organization's IceBridge plane monitoring the Earth's polar ice captured the image last week, and NASA ice scientist Kelly Brunt told Live Science the ice slab is a perfect example of what's known as a "tabular iceberg."
These icebergs usually break off the edge of ice shelves and are known for their vertical sides, 90-degree angles and flat plateaus. When they first split off they're objects of geometric perfection, until they float around and begin to melt, bump into things and look misshapen.
ALSO: Massive iceberg breaks off glacier in Antarctica
"We get two types of icebergs: We get the type that everyone can envision in their head that sank the Titanic, and they look like prisms or triangles at the surface and you know they have a crazy subsurface," Brunt told Live Science. "And then you have what are called 'tabular icebergs.'"
This particular tabular iceberg came from the Larsen C ice shelf on the Antarctic Peninsula. Scientists suspect it's about a mile-long across.
See more photos from NASA's operation IceBridge that's monitoring the thickness of ice in the gallery above.
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https://www.sfgate.com/science/article/tabular-iceberg-NASA-IceBridge-photo-rectangle-13329352.php
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