Evidence for an ice shelf covering the central Arctic Ocean during the penultimate glaciation

Martin Jakobsson, Johan Nilsson, Leif Anderson, Jan Backman, Göran Björk, Thomas M. Cronin, Nina Kirchner, Andrey Koshurnikov, Larry Mayer, Riko Noormets, Matthew O'Regan, Christian Stranne, Roman Ananiev, Natalia Barrientos Macho, Denis Cherniykh, Helen Coxall, Björn Eriksson, Tom Flodén, Laura Gemery, Örjan Gustafsson & 5 others Kevin Jerram, Carina Johansson, Alexey Khortov, Rezwan Mohammad, Igor Semiletov

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The hypothesis of a km-thick ice shelf covering the entire Arctic Ocean during peak glacial conditions was proposed nearly half a century ago. Floating ice shelves preserve few direct traces after their disappearance, making reconstructions difficult. Seafloor imprints of ice shelves should, however, exist where ice grounded along their flow paths. Here we present new evidence of ice-shelf groundings on bathymetric highs in the central Arctic Ocean, resurrecting the concept of an ice shelf extending over the entire central Arctic Ocean during at least one previous ice age. New and previously mapped glacial landforms together reveal flow of a spatially coherent, in some regions >1-km thick, central Arctic Ocean ice shelf dated to marine isotope stage 6 (∼140ka). Bathymetric highs were likely critical in the ice-shelf development by acting as pinning points where stabilizing ice rises formed, thereby providing sufficient back stress to allow ice shelf thickening.

Original languageEnglish
Article number10365
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 18 Jan 2016

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land ice
Arctic Ocean
Ice
Oceans and Seas
coverings
ice
landforms
Landforms
floating
Electric grounding
isotopes
Isotopes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Evidence for an ice shelf covering the central Arctic Ocean during the penultimate glaciation. / Jakobsson, Martin; Nilsson, Johan; Anderson, Leif; Backman, Jan; Björk, Göran; Cronin, Thomas M.; Kirchner, Nina; Koshurnikov, Andrey; Mayer, Larry; Noormets, Riko; O'Regan, Matthew; Stranne, Christian; Ananiev, Roman; Barrientos Macho, Natalia; Cherniykh, Denis; Coxall, Helen; Eriksson, Björn; Flodén, Tom; Gemery, Laura; Gustafsson, Örjan; Jerram, Kevin; Johansson, Carina; Khortov, Alexey; Mohammad, Rezwan; Semiletov, Igor.

In: Nature Communications, Vol. 7, 10365, 18.01.2016.

Research output: Contribution to journalArticle

Jakobsson, M, Nilsson, J, Anderson, L, Backman, J, Björk, G, Cronin, TM, Kirchner, N, Koshurnikov, A, Mayer, L, Noormets, R, O'Regan, M, Stranne, C, Ananiev, R, Barrientos Macho, N, Cherniykh, D, Coxall, H, Eriksson, B, Flodén, T, Gemery, L, Gustafsson, Ö, Jerram, K, Johansson, C, Khortov, A, Mohammad, R & Semiletov, I 2016, 'Evidence for an ice shelf covering the central Arctic Ocean during the penultimate glaciation', Nature Communications, vol. 7, 10365. https://doi.org/10.1038/ncomms10365
Jakobsson M, Nilsson J, Anderson L, Backman J, Björk G, Cronin TM et al. Evidence for an ice shelf covering the central Arctic Ocean during the penultimate glaciation. Nature Communications. 2016 Jan 18;7. 10365. https://doi.org/10.1038/ncomms10365
Jakobsson, Martin ; Nilsson, Johan ; Anderson, Leif ; Backman, Jan ; Björk, Göran ; Cronin, Thomas M. ; Kirchner, Nina ; Koshurnikov, Andrey ; Mayer, Larry ; Noormets, Riko ; O'Regan, Matthew ; Stranne, Christian ; Ananiev, Roman ; Barrientos Macho, Natalia ; Cherniykh, Denis ; Coxall, Helen ; Eriksson, Björn ; Flodén, Tom ; Gemery, Laura ; Gustafsson, Örjan ; Jerram, Kevin ; Johansson, Carina ; Khortov, Alexey ; Mohammad, Rezwan ; Semiletov, Igor. / Evidence for an ice shelf covering the central Arctic Ocean during the penultimate glaciation. In: Nature Communications. 2016 ; Vol. 7.
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