Halley VI research station, situated on the Brunt ice shelf. Photograph: British Antarctica Station


Scientists to be removed from Halley VI Research Station amid fears facility could slide into encroaching ice fissure...

The British research base which first discovered the hole in the ozone layer is to close for the winter amid concerns it could fall into a giant ice chasm.

Scientists will be removed from the Halley VI research station, which is run by the British Antarctic Survey and is situated on an ice shelf, between March and November as a “precautionary measure” because of fears it could slide into an encroaching fissure.

The organisation said while there was no immediate risk to its 88 staff at the station the new crack “presents a complex glaciological picture” and that it would be extremely difficult to evacuate during the winter if the ice shelf fractured.

Tim Stockings, director of operations, said Halley VI, which was to be occupied by 16 staff over the winter months, was designed specifically to move inland if required and that the relocation was going well.

He said: “This challenging engineering project is scheduled to complete as planned by early March 2017. We want to do the right thing for our people. Bringing them home for winter is a prudent precaution given the changes that our glaciologists have seen in the ice shelf in recent months.”

He added: “Our goal is to winterise the station and leave it ready for reoccupation as soon as possible after the Antarctic winter.”

The second crack to the north of the station was first spotted in October 2016. Since then glaciologists have monitored its growth using a network of GPS instruments that measure the deformation of the ice, together with European Space Agency satellite imagery and on-site drone footage.

While they have run computer models and created bathymetric maps to determine whether or not a large iceberg will calve, they say they are unable to predict with certainty what the impact could be on the ice shelf.

The BAS said it was confident of mounting a fast uplift of personnel during summer months should the fracturing of the ice shelf occur. However, access to the centre by ship or aircraft is extremely difficult during the winter months when it is dark 24 hours a day, with extremely low temperatures and the sea frozen.

The station is a platform for global Earth, atmospheric and space weather observation in a climate-sensitive zone. Crucial research carried out at the base includes studies such as the impact of extreme space weather events and climate change. Halley VI has also taken ozone measurements continually since 1956 when the team first discovered the Antarctic ozone-layer hole in 1985.

Temporary containerised facilities have been set up at the site to keep projects going during winter until the team is moved to the new location next summer.

Monday 16 January 2017


original story HERE


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