A68: "Megaberg" has pumped huge volumes of fresh water
The massive Iceberg A68 was dumped greater than 1.5 billion tons of ocean freshwater each every day, at the peak of its melt.
To put it in perspective It's around 1500 times more water consumed each day by every UK citizens. For a brief period, the biggest Iceberg. It covered more than 6,000 square kilometers (2,300 square miles) when it broke away from Antarctica in the year 2017. However, by the time it reached 2021, it was gone. A trillion tonnes of glacier gone. The way a huge block of ice turned into an obsession Iceberg which became a popular social media icon disappears Polar ocean floor exposed following 50 years of ice covering Museum at the bottom of the earth reopens the very end of the year. Researchers are currently trying to assess the impact A68 had on the planet. A team by Leeds University has been back looking through the entire satellite images to determine the size of the giant as it moved to the north of to the White Continent, through the Southern Ocean and up into the South Atlantic. This has enabled the group to assess varying melt rates during the course of the megaberg's three-and-a-half-year existence. One of the most important times clearly was towards the end as A68 drew closer to the warm climes that are part of south Georgia. British Overseas Territory of South Georgia. There were concerns that the huge block might be crushed in the shallows surrounding it blocking the routes of foraging that millions of penguins whales and seals. However, it didn't happen as it was discovered by the team that, as they is able to demonstrate that A68 did not have enough depth of the keel to remain in the water. "It does seem that it briefly touched the continental shelf. That's when the berg took a turn and we saw a small piece break off. But it wasn't enough to ground A68," lead author Ms . Anne Braakmann-Folgmann, from the Nerc Centre for Polar Observation and Modelling at Leeds explained to BBC News. "And I think you can see why in the thickness estimates," said co-author Prof. Andrew Shepherd. "By that stage the berg's keel was 141m, on average, and the bathymetry (depth) charts in the area showed 150m. It was a close call in the end. In April 2021, A68 had split into many smaller pieces that were beyond being tracked. But the impacts on the ecosystem would have lasted much longer.
Yorumlar
Yorum Gönder