MAR 03, 2021 8:42 AM PST

Ginormous iceberg breaks off Antarctica ice sheet

According to observations from the British Antarctic Survey (BAS) at the Halley Research Station, a massive iceberg has separated from the Brunt Ice Shelf in Antarctica. Reports say the calved iceberg measures 1270 km² in size.

The calving comes after roughly a decade of waiting, as BAS scientists first noticed cracks in the 150-meter thick ice shelf years ago. However, it became obvious that the calving would take place in the near future back in November of 2020 when a new large crack called the North Rift appeared. The crack eventually widened enough to break off from the ice shelf on the morning of February 26th.

“Our teams at BAS have been prepared for the calving of an iceberg from Brunt Ice Shelf for years. We monitor the ice shelf daily using an automated network of high-precision GPS instruments that surround the station; these measure how the ice shelf is deforming and moving.  We also use satellite images from ESA, NASA, and the German satellite TerraSAR-X.  All the data are sent back to Cambridge for analysis, so we know what’s happening even in the Antarctic winter, when there are no staff on the station, it’s pitch black, and the temperature falls below minus 50 degrees C (or -58F),” said BAS director Jane Francis.

As to what is will happen next, Francis adds that while it is unclear how the iceberg will move, the extensive monitoring of the ice shelf by the BAS, European Space Agency, and NASA, will provide precise updates as events unfold. “Over the coming weeks or months, the iceberg may move away; or it could run aground and remain close to Brunt Ice Shelf,” notes Francis. “Halley Station is located inland of all the active chasms, on the part of the ice shelf that remains connected to the continent. Our network of GPS instruments will give us early warning if the calving of this iceberg causes changes in the ice around our station.”

“This is a dynamic situation.  Four years ago, we moved Halley Research Station inland to ensure that it would not be carried away when an iceberg eventually formed.  That was a wise decision.  Our job now is to keep a close eye on the situation and assess any potential impact of the present calving on the remaining ice shelf.  We continuously review our contingency plans to ensure the safety of our staff, protect our research station, and maintain the delivery of the science we undertake at Halley,” comments BAS Director of Operations, Simon Garrod.

The researchers add that there is currently no evidence to suggest that climate change was an active factor in the calving of the iceberg, saying that such sea ice changes in this area are natural and relatively common.   

Sources: BAS, Earther Gizmodo

About the Author
BA Environmental Studies
Kathryn is a curious world-traveller interested in the intersection between nature, culture, history, and people. She has worked for environmental education non-profits and is a Spanish/English interpreter.
You May Also Like
OCT 07, 2022
Earth & The Environment
United Nations Genetic Diversity Target Deadline Has Passed
OCT 07, 2022
United Nations Genetic Diversity Target Deadline Has Passed
In a recent study published in Science, an international team of researchers led by Stanford University examine how habi ...
OCT 12, 2022
Plants & Animals
New gibbon fossils suggest the genus is 8 million years old
OCT 12, 2022
New gibbon fossils suggest the genus is 8 million years old
New fossil teeth and face suggest gibbon ancestors are older than thought
OCT 29, 2022
Technology
Making EVs More Enticing for Drivers
OCT 29, 2022
Making EVs More Enticing for Drivers
In a recent study published in IEEE Transactions on Intelligent Transport Systems, a pair of researchers from North Caro ...
OCT 31, 2022
Plants & Animals
Innovative Insecticides Adversely Affect Bee Health
OCT 31, 2022
Innovative Insecticides Adversely Affect Bee Health
Insecticides and pesticides have been developed for years to help protect agricultural products and improve crop outputs ...
NOV 01, 2022
Chemistry & Physics
Modern Pesticides Found in Archaeological Materials
NOV 01, 2022
Modern Pesticides Found in Archaeological Materials
It may or may not come as a surprise to some, but a lot of archaeological finds are found, well…underground. Quit ...
NOV 23, 2022
Drug Discovery & Development
Evidence of antibiotic resistance genes in 'zombie' microbes of the arctic permafrost
NOV 23, 2022
Evidence of antibiotic resistance genes in 'zombie' microbes of the arctic permafrost
One of the most significant consequences of climate change is the greenhouse gases generated from the microbial decompos ...
Loading Comments...