The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

O'Regan, Matt; Backman, Jan; Barrientos, Natalia; Cronin, Thomas M.; Gemery, Laura; Kirchner, Nina; Mayer, Larry A.; Nilsson, Johan; Noormets, Riko; Pearce, Christof; Semiletov, Igor; Stranne, Christian; Jakobsson, Martin

doi:https://doi.org/10.5194/cp-13-1269-2017

Articles | Volume 13, issue 9

https://doi.org/10.5194/cp-13-1269-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Climate–carbon–cryosphere interactions in the...

https://doi.org/10.5194/cp-13-1269-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 13, issue 9

Research article

|

28 Sep 2017

Research article |

| 28 Sep 2017

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

Matt O'Regan, Jan Backman, Natalia Barrientos, Thomas M. Cronin, Laura Gemery, Nina Kirchner, Larry A. Mayer, Johan Nilsson, Riko Noormets, Christof Pearce, Igor Semiletov, Christian Stranne, and Martin Jakobsson

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Final revised paper (published on 28 Sep 2017)
Preprint (discussion started on 20 Apr 2017)

Interactive discussion

Status: closed

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

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RC1: 'De Long Trough: A newly discovered glacial trough on the East Siberian Continental Margin', Anonymous Referee #1, 12 Jun 2017
- AC1: 'Response to Reviewer #1', Matt O'Regan, 30 Jul 2017
RC2: 'review of cp-2017-56', Anonymous Referee #2, 13 Jun 2017
- AC2: 'Response to Anonymous Referee #2', Matt O'Regan, 30 Jul 2017

Peer-review completion

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

ED: Publish subject to minor revisions (review by Editor) (31 Jul 2017) by Carlo Barbante

AR by Matt O'Regan on behalf of the Authors (31 Jul 2017) Author's response Manuscript

ED: Publish as is (21 Aug 2017) by Carlo Barbante

AR by Matt O'Regan on behalf of the Authors (22 Aug 2017) Manuscript

Short summary

Past glacial activity on the East Siberian continental margin is poorly known, partly due to the lack of geomorphological evidence. Here we present geophysical mapping and sediment coring data from the East Siberian shelf and slope revealing the presence of a glacially excavated cross-shelf trough reaching to the continental shelf edge north of the De Long Islands. The data provide direct evidence for extensive glacial activity on the Siberian shelf that predates the Last Glacial Maximum.