Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet
The increasing catalogue of high-quality ice-penetrating radar data provides a unique insight in the internal layering architecture of the Greenland ice sheet. The stratigraphy, an indicator of past deformation, highlights irregularities in ice flow and reveals large perturbations without obvious li...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Nature Publishing Group
2016
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855532/ http://www.ncbi.nlm.nih.gov/pubmed/27126274 https://doi.org/10.1038/ncomms11427 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:4855532 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:4855532 2023-05-15T16:21:06+02:00 Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet Bons, Paul D. Jansen, Daniela Mundel, Felicitas Bauer, Catherine C. Binder, Tobias Eisen, Olaf Jessell, Mark W. Llorens, Maria-Gema Steinbach, Florian Steinhage, Daniel Weikusat, Ilka 2016-04-29 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855532/ http://www.ncbi.nlm.nih.gov/pubmed/27126274 https://doi.org/10.1038/ncomms11427 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855532/ http://www.ncbi.nlm.nih.gov/pubmed/27126274 http://dx.doi.org/10.1038/ncomms11427 Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/ncomms11427 2016-05-15T00:08:28Z The increasing catalogue of high-quality ice-penetrating radar data provides a unique insight in the internal layering architecture of the Greenland ice sheet. The stratigraphy, an indicator of past deformation, highlights irregularities in ice flow and reveals large perturbations without obvious links to bedrock shape. In this work, to establish a new conceptual model for the formation process, we analysed the radar data at the onset of the Petermann Glacier, North Greenland, and created a three-dimensional model of several distinct stratigraphic layers. We demonstrate that the dominant structures are cylindrical folds sub-parallel to the ice flow. By numerical modelling, we show that these folds can be formed by lateral compression of mechanically anisotropic ice, while a general viscosity contrast between layers would not lead to folding for the same boundary conditions. We conclude that the folds primarily form by converging flow as the mechanically anisotropic ice is channelled towards the glacier. Text glacier Greenland Ice Sheet North Greenland Petermann glacier PubMed Central (PMC) Greenland Nature Communications 7 1 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Article |
spellingShingle |
Article Bons, Paul D. Jansen, Daniela Mundel, Felicitas Bauer, Catherine C. Binder, Tobias Eisen, Olaf Jessell, Mark W. Llorens, Maria-Gema Steinbach, Florian Steinhage, Daniel Weikusat, Ilka Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet |
topic_facet |
Article |
description |
The increasing catalogue of high-quality ice-penetrating radar data provides a unique insight in the internal layering architecture of the Greenland ice sheet. The stratigraphy, an indicator of past deformation, highlights irregularities in ice flow and reveals large perturbations without obvious links to bedrock shape. In this work, to establish a new conceptual model for the formation process, we analysed the radar data at the onset of the Petermann Glacier, North Greenland, and created a three-dimensional model of several distinct stratigraphic layers. We demonstrate that the dominant structures are cylindrical folds sub-parallel to the ice flow. By numerical modelling, we show that these folds can be formed by lateral compression of mechanically anisotropic ice, while a general viscosity contrast between layers would not lead to folding for the same boundary conditions. We conclude that the folds primarily form by converging flow as the mechanically anisotropic ice is channelled towards the glacier. |
format |
Text |
author |
Bons, Paul D. Jansen, Daniela Mundel, Felicitas Bauer, Catherine C. Binder, Tobias Eisen, Olaf Jessell, Mark W. Llorens, Maria-Gema Steinbach, Florian Steinhage, Daniel Weikusat, Ilka |
author_facet |
Bons, Paul D. Jansen, Daniela Mundel, Felicitas Bauer, Catherine C. Binder, Tobias Eisen, Olaf Jessell, Mark W. Llorens, Maria-Gema Steinbach, Florian Steinhage, Daniel Weikusat, Ilka |
author_sort |
Bons, Paul D. |
title |
Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet |
title_short |
Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet |
title_full |
Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet |
title_fullStr |
Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet |
title_full_unstemmed |
Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet |
title_sort |
converging flow and anisotropy cause large-scale folding in greenland's ice sheet |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855532/ http://www.ncbi.nlm.nih.gov/pubmed/27126274 https://doi.org/10.1038/ncomms11427 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet North Greenland Petermann glacier |
genre_facet |
glacier Greenland Ice Sheet North Greenland Petermann glacier |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855532/ http://www.ncbi.nlm.nih.gov/pubmed/27126274 http://dx.doi.org/10.1038/ncomms11427 |
op_rights |
Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms11427 |
container_title |
Nature Communications |
container_volume |
7 |
container_issue |
1 |
_version_ |
1766009114164461568 |