The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland
Submarine glacial landforms in fjords are imprints of the dynamic behaviour of marine-terminating glaciers and are informative about their most recent retreat phase. Here we use detailed multibeam bathymetry to map glacial landforms in Petermann Fjord and Nares Strait, northwestern Greenland. A larg...
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ftnerc:oai:nora.nerc.ac.uk:518998 2023-05-15T16:21:06+02:00 The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland Jakobsson, Martin Hogan, Kelly A. Mayer, Larry A. Mix, Alan Jennings, Anne Stoner, Joe Eriksson, Bjorn Jerram, Kevin Mohammad, Rezwan Pearce, Christof Reilly, Brendan Stranne, Christian 2018-05-29 text http://nora.nerc.ac.uk/id/eprint/518998/ https://nora.nerc.ac.uk/id/eprint/518998/1/Jakobsson.pdf https://www.nature.com/articles/s41467-018-04573-2 en eng Springer https://nora.nerc.ac.uk/id/eprint/518998/1/Jakobsson.pdf Jakobsson, Martin; Hogan, Kelly A. orcid:0000-0002-1256-8010 Mayer, Larry A.; Mix, Alan; Jennings, Anne; Stoner, Joe; Eriksson, Bjorn; Jerram, Kevin; Mohammad, Rezwan; Pearce, Christof; Reilly, Brendan; Stranne, Christian. 2018 The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland. Nature Communications, 9, 2104. https://doi.org/10.1038/s41467-018-04573-2 <https://doi.org/10.1038/s41467-018-04573-2> cc_by_4 CC-BY Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1038/s41467-018-04573-2 2023-02-04T19:45:59Z Submarine glacial landforms in fjords are imprints of the dynamic behaviour of marine-terminating glaciers and are informative about their most recent retreat phase. Here we use detailed multibeam bathymetry to map glacial landforms in Petermann Fjord and Nares Strait, northwestern Greenland. A large grounding-zone wedge (GZW) demonstrates that Petermann Glacier stabilised at the fjord mouth for a considerable time, likely buttressed by an ice shelf. This stability was followed by successive backstepping of the ice margin down the GZW’s retrograde backslope forming small retreat ridges to 680 m current depth (∼730–800 m palaeodepth). Iceberg ploughmarks occurring somewhat deeper show that thick, grounded ice persisted to these water depths before final breakup occurred. The palaeodepth limit of the recessional moraines is consistent with final collapse driven by marine ice cliff instability (MICI) with retreat to the next stable position located underneath the present Petermann ice tongue, where the seafloor is unmapped. Article in Journal/Newspaper glacier Greenland Ice Shelf Nares strait Petermann Fjord Petermann glacier Natural Environment Research Council: NERC Open Research Archive Greenland Nares ENVELOPE(158.167,158.167,-81.450,-81.450) Petermann Fjord ENVELOPE(-61.500,-61.500,81.167,81.167) Nature Communications 9 1 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Submarine glacial landforms in fjords are imprints of the dynamic behaviour of marine-terminating glaciers and are informative about their most recent retreat phase. Here we use detailed multibeam bathymetry to map glacial landforms in Petermann Fjord and Nares Strait, northwestern Greenland. A large grounding-zone wedge (GZW) demonstrates that Petermann Glacier stabilised at the fjord mouth for a considerable time, likely buttressed by an ice shelf. This stability was followed by successive backstepping of the ice margin down the GZW’s retrograde backslope forming small retreat ridges to 680 m current depth (∼730–800 m palaeodepth). Iceberg ploughmarks occurring somewhat deeper show that thick, grounded ice persisted to these water depths before final breakup occurred. The palaeodepth limit of the recessional moraines is consistent with final collapse driven by marine ice cliff instability (MICI) with retreat to the next stable position located underneath the present Petermann ice tongue, where the seafloor is unmapped. |
format |
Article in Journal/Newspaper |
author |
Jakobsson, Martin Hogan, Kelly A. Mayer, Larry A. Mix, Alan Jennings, Anne Stoner, Joe Eriksson, Bjorn Jerram, Kevin Mohammad, Rezwan Pearce, Christof Reilly, Brendan Stranne, Christian |
spellingShingle |
Jakobsson, Martin Hogan, Kelly A. Mayer, Larry A. Mix, Alan Jennings, Anne Stoner, Joe Eriksson, Bjorn Jerram, Kevin Mohammad, Rezwan Pearce, Christof Reilly, Brendan Stranne, Christian The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland |
author_facet |
Jakobsson, Martin Hogan, Kelly A. Mayer, Larry A. Mix, Alan Jennings, Anne Stoner, Joe Eriksson, Bjorn Jerram, Kevin Mohammad, Rezwan Pearce, Christof Reilly, Brendan Stranne, Christian |
author_sort |
Jakobsson, Martin |
title |
The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland |
title_short |
The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland |
title_full |
The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland |
title_fullStr |
The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland |
title_full_unstemmed |
The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland |
title_sort |
holocene retreat dynamics and stability of petermann glacier in northwest greenland |
publisher |
Springer |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/518998/ https://nora.nerc.ac.uk/id/eprint/518998/1/Jakobsson.pdf https://www.nature.com/articles/s41467-018-04573-2 |
long_lat |
ENVELOPE(158.167,158.167,-81.450,-81.450) ENVELOPE(-61.500,-61.500,81.167,81.167) |
geographic |
Greenland Nares Petermann Fjord |
geographic_facet |
Greenland Nares Petermann Fjord |
genre |
glacier Greenland Ice Shelf Nares strait Petermann Fjord Petermann glacier |
genre_facet |
glacier Greenland Ice Shelf Nares strait Petermann Fjord Petermann glacier |
op_relation |
https://nora.nerc.ac.uk/id/eprint/518998/1/Jakobsson.pdf Jakobsson, Martin; Hogan, Kelly A. orcid:0000-0002-1256-8010 Mayer, Larry A.; Mix, Alan; Jennings, Anne; Stoner, Joe; Eriksson, Bjorn; Jerram, Kevin; Mohammad, Rezwan; Pearce, Christof; Reilly, Brendan; Stranne, Christian. 2018 The Holocene retreat dynamics and stability of Petermann Glacier in northwest Greenland. Nature Communications, 9, 2104. https://doi.org/10.1038/s41467-018-04573-2 <https://doi.org/10.1038/s41467-018-04573-2> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-018-04573-2 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766009114667778048 |