That sensational rectangle-shaped iceberg that was photographed in mid-October by NASA researcher Jeremy Harbeck had a a lot more traumatic journey than we believed. Researchers recalled through satellite images to backtrack the ‘berg’s journey. They discovered that it calved from the Larsen C Ice Rack in November 2017.

In Universe Today’s initial post on the rectangle-shaped iceberg, we reported that it had actually just recently calved from the substantial iceberg A-68, which itself originated from the Larsen C Ice Rack This made good sense since no one believed that those square edges might’ve made it through for so long without being injured.

However as it ends up, the square-cornered icebergs didn’t originate from A-68, however straight from the Larsen C Ice Rack. That suggests it had a a lot longer, a lot more dangerous journey than idea. Researchers returned over satellite information from the USGS’s Landsat 8 and the European Area Firm’s Sentinel-1 and traced the ‘berg’s origins.

What they discovered was that after the massive A-68 iceberg calved from the Larsen C Ice Rack, the rectangle-shaped iceberg broke off from the newly-exposed edge of Larsen. The image listed below, from Steph Lhermitte of the Delft University of Innovation, reveals what took place.

After it broke off from the Larsen Rack, it started moving northward, through the brand-new channel of water in between A-68 and the Larsen. It’s fantastic it made it through that part of its journey with its rectangle-shaped shape undamaged. The are has lots of other, smaller sized bergs, not to point out A-68 and the Larsen Rack.

The iceberg continued north and took a trip through a narrow passage in between A-68’s northern suggestion and a rocky outcrop near the ice rack called Bawden Ice Increase. NASA/UMBC glaciologist Chris Shuman compares this zone to a nutcracker. The rectangle-shaped iceberg has a great deal of cousins in the location. A-68 has actually consistently smashed versus the Bawden Ice Increase, and triggered pieces of ice to splinter into a collection of clean-cut geometric shapes. A location of geometric ice debris shows up in the Landsat 8 image (listed below) from October 14, 2018, 2 days prior to the IceBridge flight that Harbeck initially recorded the images from.

This Landsat-8 image from October 18th shows a field of geometric ice rubble including the rectangular iceberg, now a trapezoid. Image: Landsat-8
This Landsat-8 image from October 18 th reveals a field of geometric ice debris consisting of the rectangle-shaped iceberg, now a trapezoid. Image: Landsat-8

The popular rectangle-shaped iceberg did not keep its exceptional shape through its journey. Repetitive accidents broke it into smaller sized pieces, and in the image above it is a trapezoid. The trapezoidal berg has to do with 900 meters large and 1500 meters long, and it’s simply another iceberg now, wandering north into warmer waters to pass away.


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