A68_movie_Jul2019_large_opt

Since it calved away from the Larsen C Ice Shelf on July 12th 2017, Iceberg A68 has spun around nearly 270 degrees and been carried north 250 km by the ocean current known as the Weddell Gyre.

This animation is made from hundreds of Sentinel-1 microwave images stiched together in 5-day intervals. You are welcome to download this for sharing or ask me for an un-annotated version, but please make sure proper attribution is given to the Copernicus Mission which funds the satellites and ESA, who pre-process and make available the data.

Iceberg A68 is the sixth largest iceberg in the satellite record. For an object weighing around one trillion tonnes, it appears remarkably mobile – Antarctic tabular icebergs are probably the planet’s most massive free-moving objects. At 160 kilometres long by only a couple of hundred metres thick, the aspect ratio of Iceberg A68 is more like a credit card than a typically imagined iceberg. All the more surprising then, that despite grounding on the sea floor several times, Iceberg A68 remains in pretty much the same shape that it had when it calved away 2 years ago.

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