It has been the largest floating ice block in Antarctica since its separation from the continent in July 2017 . It had been circling in a northerly direction with hardly losing size, but now, data and images from the Sentinel-1 satellite of the European Union have shown that a considerable part of this iceberg has detached from the great block.
The fragment is about 175 square kilometers and 19 kilometers long and, according to Swansea University researcher Adrian Luckman, speaking to the BBC News science correspondent, this could spell the beginning of the end of the large icy block called A-68. (name assigned by the US National Ice Center that divides Antarctica into quadrants).
“I am continually amazed that something so thin and fragile has lasted so long in the open sea,” Luckman said. ” I suspect that the final rift is beginning , but the later fragments will probably be with us for years.”
Professor Luckman has been monitoring the progress of the iceberg and exposes as responsible for the breakage the wear of small chips everywhere. The expert has spoken about it on his Twitter account:
The monstrous A-68 iceberg is approximately 5,100 square kilometers, as large as Trinidad and Tobago in the Caribbean, and weighs a trillion tons. To have a closer comparative idea, the Community of Madrid has an area of 8,022 km² and the island of Mallorca, a total of 3,640 km². Of course, the A68 looks more like a giant credit card than the iceberg that we usually imagine.
The A-68 separated from the Larsen C ice shelf in July 2017 and had remained floating in the cold waters without any change. Ntil now. On April 19 it dropped a sizable chunk of about 175 square kilometers as it moved north from the Antarctic Peninsula. It has entered harder and warmer waters, so it is going through currents that should carry it towards the South Atlantic. Leading the way to his demise.
In 2017, the A-68 was about 6,000 square kilometers in area, and it didn’t move very far for a few months. It had an average thickness of about 190 meters . But slowly, the colossal iceberg began to move north. At present, it has passed the South Orkney Islands which make up the furthest end of the Antarctic Peninsula and may continue towards the South Sandwich Islands.
How long will the A-68 iceberg last in its entirety?
Scientists are concerned that A-68 is now currently trapped by quite a bit of motion stress, so further splits or fragmentation of the mother iceberg cannot be ruled out in the coming months . Be that as it may, individual pieces of ice could still take many years to disappear.
Nomenclature
Specifically the iceberg would more correctly be the A-68A, because the later breaks also have their own related name. A-68B broke off very early in life from the main iceberg. And this new portion is sure to get the A-68C designation.
