Articles | Volume 14, issue 9
The Cryosphere, 14, 2883–2908, 2020
The Cryosphere, 14, 2883–2908, 2020
Research article
09 Sep 2020
Research article | 09 Sep 2020

Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing

Kelly A. Hogan et al.

Data sets

A multibeam-bathymetric compilation for the southern Amundsen Sea shelf, 1999--2019 (Version 1.0) K. A. Hogan, R. D. Larter, A. G. C. Graham, F. O. Nitsche, J. D. Kirkham, R. Totten Minzoni, R. Clark, V. Fitzgerald, J. B. Anderson, C.-D. Hillenbrand, L. Simkins, J. A. Smith, K. Gohl, J. E. Arndt, J. Hong, K. J. Heywood, E. P. Abrahamsen, A. F. Thompson, R. Dunbar, and J. S. Wellner

Short summary
The sea-floor geometry around the rapidly changing Thwaites Glacier is a key control on warm ocean waters reaching the ice shelf and grounding zone beyond. This area was previously unsurveyed due to icebergs and sea-ice cover. The International Thwaites Glacier Collaboration mapped this area for the first time in 2019. The data reveal troughs over 1200 m deep and, as this region is thought to have only ungrounded recently, provide key insights into the morphology beneath the grounded ice sheet.