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 Minzoni, Rebecca; 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

The Cryosphere, 14, 2883–2908, 2020

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 Cryosphere, 14, 2883–2908, 2020

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 et al.

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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.