A 14.5-million-year record of East Antarctic Ice Sheet fluctuations from the central Transantarctic Mountains, constrained with cosmogenic 3He, 10Be, 21Ne, and 26Al

Balter-Kennedy, Allie; Bromley, Gordon; Balco, Greg; Thomas, Holly; Jackson, Margaret S.

doi:https://doi.org/10.5194/tc-14-2647-2020

Articles | Volume 14, issue 8

https://doi.org/10.5194/tc-14-2647-2020

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

https://doi.org/10.5194/tc-14-2647-2020

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

Articles | Volume 14, issue 8

Research article

|

20 Aug 2020

Research article |

| 20 Aug 2020

A 14.5-million-year record of East Antarctic Ice Sheet fluctuations from the central Transantarctic Mountains, constrained with cosmogenic ³He, ¹⁰Be, ²¹Ne, and ²⁶Al

Allie Balter-Kennedy, Gordon Bromley, Greg Balco, Holly Thomas, and Margaret S. Jackson

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Final revised paper (published on 20 Aug 2020)
Supplement to the final revised paper
Preprint (discussion started on 02 Mar 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

RC1: 'Antarctic ice sheet moraines', David Sugden, 30 Mar 2020
- AC1: 'Author response to referee comments on “A 14.5 million-year record of East Antarctic Ice Sheet fluctuations from the central Transantarctic Mountains, constrained with cosmogenic 3He, 10Be, 21Ne, and 26Al”', Alexandra Balter, 01 Jun 2020
RC2: 'A 14.5 million-year record of East Antarctic Ice Sheet fluctuations', Julia Lindow, 15 Jun 2020
- AC2: 'Author response to referee comments on “A 14.5 million-year record of East Antarctic Ice Sheet fluctuations from the central Transantarctic Mountains, constrained with cosmogenic 3He, 10Be, 21Ne, and 26Al”', Alexandra Balter, 19 Jun 2020

Peer-review completion

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

ED: Publish subject to minor revisions (review by editor) (03 Jul 2020) by Joel Savarino

AR by Allie Balter-Kennedy on behalf of the Authors (05 Jul 2020) Author's response Manuscript

ED: Publish as is (15 Jul 2020) by Joel Savarino

Short summary

We describe new geologic evidence from Antarctica that demonstrates changes in East Antarctic Ice Sheet (EAIS) extent over the past ~ 15 million years. Our data show that the EAIS was a persistent feature in the Transantarctic Mountains for much of that time, including some (but not all) times when global temperature may have been warmer than today. Overall, our results comprise a long-term record of EAIS change and may provide useful constraints for ice sheet models and sea-level estimates.