NASA discovered a perfectly rectangular monolithic slab of ice in Antarctica, floating simply off the Larsen C ice shelf. This iceberg appears quite unnatural, considering the 90-degree angles.
NASA took the image as part of Operation Ice Bridge, a mission to picture Earth’s polar regions so as to see how ice (thickness, location, accumulation, and so forth.) has been changing lately.
While the chunk of ice is very peculiar to take a look at, it is a completely natural phenomenon. The majority of us are accustomed to seeing pictures of angular ice sheets with only a little tip bulging out of the water. Nonetheless, there is a totally extraordinary type of iceberg called tabular icebergs.
Tabular ice shelves have steep, about vertical sides and a flat plateau top. These icebergs normally break off of ice shelves, which are tabular bodies of thick ice. At the point when there is a clean calve of the ice shelf, the edges can be near 90 degrees. For this situation, the ice shelf is likely not extremely old as wind, waves and sea spray will, in the long run, winnow away the sharp edges of this iceberg and round it out, Kelly Brunt, a NASA researcher, told Live Science.
As you may know, ordinarily just 10 percent of an iceberg sits over the sea surface when floating. Notwithstanding, it’s not clear whether the ice sheet is completely drifting or somewhat sitting on the ocean bottom.
While this iceberg hasn’t been measured, some of these icebergs can be incredibly large. The world’s biggest recorded iceberg is Iceberg B-15, sitting at 183 miles in length and 23 miles wide. The tabular iceberg, which was bigger than the island of Jamaica, calved off the Ross Ice Shelf in 2000.
Ice shelves from where land meets the sea. As ice flow from the mainland mass down to the sea, it inevitably spills out over the sea, in a few spots floating and in other places partially supported by the ocean floor. The ice that sits over the sea yet is attached to the land is an ice shelf. A normal process for these ice shelves is calving, the breaking off of distal ice from the larger ice shelf.
NASA plans to study this calving process through Operation IceBridge as a means of measuring melting because of an unnatural weather change. As the planet warms, these ice shelves become much more susceptible to calve off and melt as they drift off into the sea. This is a key variable in the continued sea level rise NASA has been estimating for a considerable length of time.