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Meteorological Technology International
Polar Weather

British Antarctic Survey captures the trajectory of the A23a iceberg

Elizabeth BakerBy Elizabeth BakerJanuary 30, 20242 Mins Read
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Scientists at British Antarctic Survey have been using satellite images to track the trajectory of the A23a iceberg as it moves north out of the Weddell Sea.

Among the clouds and sea ice, the iceberg is shown alongside the tracks of previous large icebergs A68 and A76a. The animation has been compiled from Copernicus Sentinel-3 satellite imagery.

Andrew Fleming, head of mapping and GIS at British Antarctic Survey, commented, “The iceberg is following a very similar path and we’ll be interested to see if it also gets caught in the same place as the previous bergs, which span in circles for several weeks before moving on.”

Previously, in November 2023, A23a moved out of the Weddell Sea sector into the Southern Ocean. It calved from the Filchner Ice Shelf in 1986, before being grounded on the seabed nearby.

Scientists on board RRS Sir David Attenborough sailed past the mega iceberg as part of the BIOPOLE cruise in December 2023, and collected samples of seawater from the area.

Dr Andrew Meijers, chief scientist aboard the RRS Sir David Attenborough and Polar Oceans Science Leader at British Antarctic Survey (BAS), said, “It is incredibly lucky that the iceberg’s route out of the Weddell Sea sat directly across our planned path, and that we had the right team aboard to take advantage of this opportunity. We’re fortunate that navigating A23a hasn’t had an impact on the tight timings for our science mission, and it is amazing to see this huge berg in person – it stretches as far as the eye can see.”

For more key polar weather updates from the meteorological technology industry, click here

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