The Impact of Lithology on Fjord Morphology
Assessing the impact of glaciations on topography and the co-evolution of ice-sheet dynamics requires a thorough understanding of the factors that control fjord morphology. We investigate the role of lithology on glacial valley form using topographic analyses and numerical landscape evolution models...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/da/publications/the-impact-of-lithology-on-fjord-morphology(59cdccc1-3b97-4812-9680-c18756f4f2d6).html https://doi.org/10.1029/2021GL093101 http://www.scopus.com/inward/record.url?scp=85113550075&partnerID=8YFLogxK https://hal-insu.archives-ouvertes.fr/insu-03320558/document |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/59cdccc1-3b97-4812-9680-c18756f4f2d6 |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/59cdccc1-3b97-4812-9680-c18756f4f2d6 2023-05-15T16:27:15+02:00 The Impact of Lithology on Fjord Morphology Bernard, M. Steer, P. Gallagher, K. Egholm, D. L. 2021-08 https://pure.au.dk/portal/da/publications/the-impact-of-lithology-on-fjord-morphology(59cdccc1-3b97-4812-9680-c18756f4f2d6).html https://doi.org/10.1029/2021GL093101 http://www.scopus.com/inward/record.url?scp=85113550075&partnerID=8YFLogxK https://hal-insu.archives-ouvertes.fr/insu-03320558/document eng eng info:eu-repo/semantics/openAccess Bernard , M , Steer , P , Gallagher , K & Egholm , D L 2021 , ' The Impact of Lithology on Fjord Morphology ' , Geophysical Research Letters , vol. 48 , no. 16 , e2021GL093101 . https://doi.org/10.1029/2021GL093101 0720 0798 4302 5415 9315 fjord development glacial erosion Greenland lithology numerical models article 2021 ftuniaarhuspubl https://doi.org/10.1029/2021GL093101 2022-11-16T23:54:13Z Assessing the impact of glaciations on topography and the co-evolution of ice-sheet dynamics requires a thorough understanding of the factors that control fjord morphology. We investigate the role of lithology on glacial valley form using topographic analyses and numerical landscape evolution models. We measure fjord depths and widths from East Central Greenland (68°N–75°N), and find a control of lithology on fjord width, with wider fjords in softer rocks (i.e., sedimentary rocks). This dependency of fjord width to bedrock properties is predicted by a quarrying erosion law, but not by an abrasion one, when considering results from a simple two-dimensional model and a more detailed three-dimensional ice flow model (iSOSIA). Our analyses and numerical results reveal a potential control of lithology on the width of glacial valleys with glacial quarrying as a plausible responsible mechanism. Article in Journal/Newspaper Greenland Ice Sheet Aarhus University: Research Greenland Geophysical Research Letters 48 16 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
0720 0798 4302 5415 9315 fjord development glacial erosion Greenland lithology numerical models |
spellingShingle |
0720 0798 4302 5415 9315 fjord development glacial erosion Greenland lithology numerical models Bernard, M. Steer, P. Gallagher, K. Egholm, D. L. The Impact of Lithology on Fjord Morphology |
topic_facet |
0720 0798 4302 5415 9315 fjord development glacial erosion Greenland lithology numerical models |
description |
Assessing the impact of glaciations on topography and the co-evolution of ice-sheet dynamics requires a thorough understanding of the factors that control fjord morphology. We investigate the role of lithology on glacial valley form using topographic analyses and numerical landscape evolution models. We measure fjord depths and widths from East Central Greenland (68°N–75°N), and find a control of lithology on fjord width, with wider fjords in softer rocks (i.e., sedimentary rocks). This dependency of fjord width to bedrock properties is predicted by a quarrying erosion law, but not by an abrasion one, when considering results from a simple two-dimensional model and a more detailed three-dimensional ice flow model (iSOSIA). Our analyses and numerical results reveal a potential control of lithology on the width of glacial valleys with glacial quarrying as a plausible responsible mechanism. |
format |
Article in Journal/Newspaper |
author |
Bernard, M. Steer, P. Gallagher, K. Egholm, D. L. |
author_facet |
Bernard, M. Steer, P. Gallagher, K. Egholm, D. L. |
author_sort |
Bernard, M. |
title |
The Impact of Lithology on Fjord Morphology |
title_short |
The Impact of Lithology on Fjord Morphology |
title_full |
The Impact of Lithology on Fjord Morphology |
title_fullStr |
The Impact of Lithology on Fjord Morphology |
title_full_unstemmed |
The Impact of Lithology on Fjord Morphology |
title_sort |
impact of lithology on fjord morphology |
publishDate |
2021 |
url |
https://pure.au.dk/portal/da/publications/the-impact-of-lithology-on-fjord-morphology(59cdccc1-3b97-4812-9680-c18756f4f2d6).html https://doi.org/10.1029/2021GL093101 http://www.scopus.com/inward/record.url?scp=85113550075&partnerID=8YFLogxK https://hal-insu.archives-ouvertes.fr/insu-03320558/document |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Bernard , M , Steer , P , Gallagher , K & Egholm , D L 2021 , ' The Impact of Lithology on Fjord Morphology ' , Geophysical Research Letters , vol. 48 , no. 16 , e2021GL093101 . https://doi.org/10.1029/2021GL093101 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021GL093101 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
16 |
_version_ |
1766016370122686464 |