Following the calving of the A-81 iceberg at the end of January 2023, the Brunt Ice Shelf is moving faster than before. It is currently moving approximately 4 meters a day towards the sea, whereas before the calving it moved at an average of between 1-2.5 meters a day. The observations have been submitted this week to the journal The Cryosphere.
Scientists at British Antarctic Survey are closely monitoring the situation using GPS equipment deployed on the ice and satellite data. Credit: British Antarctic Surveyat the end of January 2023, the Brunt Ice Shelf is moving faster than before. It is currently moving approximately 4 meters a day towards the sea, whereas before the calving it moved at an average of between 1-2.5 meters a day.
Scientists at British Antarctic Survey are closely monitoring the situation using GPS equipment deployed on the ice and. The monitoring data are used to aid operational planning at Halley Research Station, which is situated on the most stable part of the Brunt Ice Shelf, 20 km from the new ice front. In 2016, BAS took the precaution of relocating Halley Research Station 23 km inland of the fissure that eventually caused the calving of the A-81 iceberg, after it began to widen.
Halley is closed during the Antarctic winter and no staff are currently on station. BAS operations teams are currently planning for a routine field season at Halley with a team of 40 people flying to the Brunt Ice Shelf in November 2023. They will spend the season maintaining the power supplies and facilities that keep theoperating remotely through the winter. Their work will continue until they are collected by aircraft in February 2024.
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