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

Hogan, Kelly A.; Larter, Robert D.; Graham, Alastair G. C.; Arthern, Robert; Kirkham, James D.; Totten, Rebecca L.; Jordan, Tom A.; Clark, Rachel; Fitzgerald, Victoria; Wåhlin, Anna K.; Anderson, John B.; Hillenbrand, Claus-Dieter; Nitsche, Frank O.; Simkins, Lauren; Smith, James A.; Gohl, Karsten; Arndt, Jan Erik; Hong, Jongkuk; Wellner, Julia

doi:https://doi.org/10.5194/tc-14-2883-2020

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.

https://doi.org/10.5194/tc-14-2883-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 14, issue 9

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, Robert D. Larter, Alastair G. C. Graham, Robert Arthern, James D. Kirkham, Rebecca L. Totten, Tom A. Jordan, Rachel Clark, Victoria Fitzgerald, Anna K. Wåhlin, John B. Anderson, Claus-Dieter Hillenbrand, Frank O. Nitsche, Lauren Simkins, James A. Smith, Karsten Gohl, Jan Erik Arndt, Jongkuk Hong, and Julia Wellner

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Final revised paper (published on 09 Sep 2020)
Supplement to the final revised paper
Preprint (discussion started on 03 Feb 2020)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

SC1: 'Brief Comment on Revealing the former bed of Thwaites Glacier using sea-floor bathymetry', Nicholas Holschuh, 17 Feb 2020
- AC3: 'Response to Reviewer SC1: tc-2020-25 by Kelly Hogan et al. “Revealing the former bed of Thwaites Glacier using sea-floor bathymetry”', Kelly Hogan, 05 Jun 2020
RC1: 'reviewer comments', Matteo Spagnolo, 21 Feb 2020
- AC1: 'Response to Reviewer RC1: tc-2020-25 by Kelly Hogan et al. “Revealing the former bed of Thwaites Glacier using sea-floor bathymetry”', Kelly Hogan, 05 Jun 2020
RC2: 'Review', Martin Jakobsson, 04 Mar 2020
- AC2: 'Response to Reviewer RC2: tc-2020-25 by Kelly Hogan et al. “Revealing the former bed of Thwaites Glacier using sea-floor bathymetry”', Kelly Hogan, 05 Jun 2020
EC1: 'Editor comment', Chris R. Stokes, 17 Apr 2020
- AC4: 'Response to Reviewers: tc-2020-25 by Kelly Hogan et al. “Revealing the former bed of Thwaites Glacier using sea-floor bathymetry”', Kelly Hogan, 05 Jun 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to minor revisions (review by editor) (17 Jun 2020) by Chris R. Stokes

AR by Lorena Grabowski on behalf of the Authors (02 Jul 2020) Author's response

ED: Publish as is (08 Jul 2020) by Chris R. Stokes

Post-review adjustments

AA: Author's adjustment | EA: Editor approval

AA by Kelly Hogan on behalf of the Authors (07 Aug 2020) Author's adjustment Manuscript

EA: Adjustments approved (10 Aug 2020) by Chris R. Stokes

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.