Movement of Iceberg A-68 interrupted by the shallow seabed near the Bawden Ice Rise

Prior to mid-July 2018, drift speed at the center of iceberg A-68 were generally less than 2 km/day. This was driven by strong easterly and southerly winds, the high concentration of sea ice and the front of the Larsen C Ice Shelf that limited the movement of A-68.

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Iceberg A-68 captured in Sentinel-1 SAR on 22 July 2017, 28 August 2018 and 256 January 2019, respectively.

The iceberg gradually moved northward due to southerly winds and finally emerged from the front of Larsen C Ice Shelf in July 2018. Iceberg A-68 moved faster after mid-July 2018, showing nearly circular motion. Iceberg A-68 escaped from the bay-shaped region, but the northern part of the iceberg remains near to the Bawden Ice Rise. The movement of iceberg A-68 was likely interrupted by the shallow seabed, specifically nearby the Bawden Ice Rise.

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Change in movement speed of iceberg A-68.

Detailed analysis of drift of iceberg A-68 can be found in the paper below.

Han, H.; Lee, S.; Kim, J.-I.; Kim, S.H.; Kim, H.-C. Changes in a Giant Iceberg Created from the Collapse of the Larsen C Ice Shelf, Antarctic Peninsula, Derived from Sentinel-1 and CryoSat-2 Data. Remote Sens. 2019, 11, 404.

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