The giant Antarctic iceberg, whose journey was perhaps the best documented in history, has now melted and gone in the Atlantic Ocean.
A68 Larsen ice shelf broke In 2017 on the Antarctic Peninsula as one of the largest icebergs ever. At that time, it measured 2,240 square miles (5,800 square kilometers), the size of Delaware.
Since then, Berg has hit the South Atlantic Ocean and turned towards South Georgia Island. There, warm temperatures and waves shattered it into large chunks. Since then, these chunks have been fragmented into pieces that are too small to track. The US National Iceberg tracks icebergs that are more than 10 nautical miles (18.5 km) long or 20 square miles (68.5 sq km) or more in area. According to the center’s database, the largest part of the Larsen Ice Shelf was disqualified on April 16. It measured only 3 nautical miles x 2 nautical miles (5.5 km x 3.7 km).
The A68 has probably been studied and monitored more than any iceberg to date.Thanks to enough satellite imagery, it was clear when the giant iceberg was First started to crack Under tension of movement (only a week after being released from the ice shelf).Earth scientists say that there is an ice rift Temperature difference in water Surrounded it.They saw it Stuck in the seamount Not far from the place of delivery Pirouette towards warm water In a stream called the Weddell gyre.
It looked like A68 in November 2020 May collide with shallow water Near South Georgia, it may block access to the roosting penguin sea. However, the A68 shook violently, and instead the waves stressed it, and warm water penetrated and widened small cracks, gradually becoming muddy and fractured. According to the BBC..
Laura Gerish, a mapping specialist at the British Antarctic Survey, told the BBC: “We were able to track its progress with daily satellite imagery at a level of detail that we couldn’t really do before.”
Despite the harsh climate of Antarctica making work difficult, researchers are also working to understand how large delivery events such as those that produced the A68 affect the surrounding ecosystems. It’s done. In 2018, the British Antarctic Survey headed to the delivery site to collect seafloor samples, but was plagued by heavy sea ice. The second mission in 2019 is Also disturbed.. The mission to South Georgia in February of this year was finally successful.Deployed researchers Two marine robots Learn how the influx of cold freshwater from the melted debris of A68 affected the local ecosystem near the island. According to the BBC, one of the robots was lost, but the other was recovered in May and its data analyzed.
Originally published in Live Science.
The huge Antarctic iceberg that became an internet star finally melts
Source link The huge Antarctic iceberg that became an internet star finally melts