Articles | Volume 14, issue 9
https://doi.org/10.5194/tc-14-2883-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-14-2883-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
09 Sep 2020
Research article |
| 09 Sep 2020
| 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
British Antarctic Survey, Natural Environment Research Council,
High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Robert D. Larter
British Antarctic Survey, Natural Environment Research Council,
High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Alastair G. C. Graham
College of
Marine Science, University of South Florida, Saint Petersburg, FL 33701, USA
Robert Arthern
British Antarctic Survey, Natural Environment Research Council,
High Cross, Madingley Road, Cambridge, CB3 0ET, UK
James D. Kirkham
British Antarctic Survey, Natural Environment Research Council,
High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Scott Polar Research Institute, University of Cambridge, Lensfield
Road, Cambridge, CB2 1ER, UK
Rebecca L. Totten
Department of Geological Sciences, University of Alabama, Tuscaloosa,
AL 35487, USA
Tom A. Jordan
British Antarctic Survey, Natural Environment Research Council,
High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Rachel Clark
Department of Earth and Atmospheric Sciences, University of Houston,
Houston, TX 77204, USA
Victoria Fitzgerald
Department of Geological Sciences, University of Alabama, Tuscaloosa,
AL 35487, USA
Anna K. Wåhlin
Department of Marine Sciences, University of Gothenburg, 40530
Göteborg, Sweden
John B. Anderson
Department of Earth Science, Rice University, Houston, TX 77005, USA
Claus-Dieter Hillenbrand
British Antarctic Survey, Natural Environment Research Council,
High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Frank O. Nitsche
Lamont-Doherty Earth Observatory, Columbia University, Palisades, New
York, NY, USA
Lauren Simkins
Department of Environmental Sciences, University of Virginia,
Charlottesville, VA 22904, USA
James A. Smith
British Antarctic Survey, Natural Environment Research Council,
High Cross, Madingley Road, Cambridge, CB3 0ET, UK
Karsten Gohl
Alfred Wegener Institute Helmholtz-Centre for Polar and Marine
Research, 27568 Bremerhaven, Germany
Jan Erik Arndt
Alfred Wegener Institute Helmholtz-Centre for Polar and Marine
Research, 27568 Bremerhaven, Germany
Jongkuk Hong
Korea Polar Research Institute (KOPRI), Incheon 21990, Republic of
Korea
Julia Wellner
Department of Earth and Atmospheric Sciences, University of Houston,
Houston, TX 77204, USA
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 https://doi.org/10.5285/F2DFEDA9-BF44-4EF5-89A3-EE5E434A385C
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.
The sea-floor geometry around the rapidly changing Thwaites Glacier is a key control on warm...
