Uppermost crustal structure regulates the flow of the Greenland Ice Sheet
The flow of the Greenland Ice Sheet is controlled by subglacial processes and conditions that depend on the geological provenance and temperature of the crust beneath it, neither of which are adequately known. Here we present a seismic velocity model of the uppermost 5 km of the Greenlandic crust. W...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature PG
2021
|
Subjects: | |
Online Access: | http://hdl.handle.net/2122/15144 https://www.nature.com/articles/s41467-021-27537-5 https://doi.org/10.1038/s41467-021-27537-5 |
id |
ftingv:oai:www.earth-prints.org:2122/15144 |
---|---|
record_format |
openpolar |
spelling |
ftingv:oai:www.earth-prints.org:2122/15144 2023-05-15T16:21:08+02:00 Uppermost crustal structure regulates the flow of the Greenland Ice Sheet Jones, Glenn A Ferreira, Ana M. G. Kulessa, Bernd Schimmel, Martin Berbellini, Andrea Morelli, Andrea #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia 2021-12-15 http://hdl.handle.net/2122/15144 https://www.nature.com/articles/s41467-021-27537-5 https://doi.org/10.1038/s41467-021-27537-5 en eng Nature PG Nature Communication /12 (2021) http://hdl.handle.net/2122/15144 https://www.nature.com/articles/s41467-021-27537-5 doi:10.1038/s41467-021-27537-5 open article 2021 ftingv https://doi.org/10.1038/s41467-021-27537-5 2022-07-29T06:08:39Z The flow of the Greenland Ice Sheet is controlled by subglacial processes and conditions that depend on the geological provenance and temperature of the crust beneath it, neither of which are adequately known. Here we present a seismic velocity model of the uppermost 5 km of the Greenlandic crust. We show that slow velocities in the upper crust tend to be associated with major outlet glaciers along the ice-sheet margin, and elevated geothermal heat flux along the Iceland hotspot track inland. Outlet glaciers particularly susceptible to basal slip over deformable subglacial sediments include Jakobshavn, Helheim and Kangerdlussuaq, while geothermal warming and softening of basal ice may affect the onset of faster ice flow at Petermann Glacier and the Northeast Greenland Ice Stream. Interactions with the solid earth therefore control the past, present and future dynamics of the Greenland Ice Sheet and must be adequately explored and implemented in ice sheet models. Published 7307 1T. Struttura della Terra 5A. Ricerche polari e paleoclima JCR Journal Article in Journal/Newspaper glacier glacier Greenland greenlandic Ice Sheet Iceland Jakobshavn Petermann glacier Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Greenland Nature Communications 12 1 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
description |
The flow of the Greenland Ice Sheet is controlled by subglacial processes and conditions that depend on the geological provenance and temperature of the crust beneath it, neither of which are adequately known. Here we present a seismic velocity model of the uppermost 5 km of the Greenlandic crust. We show that slow velocities in the upper crust tend to be associated with major outlet glaciers along the ice-sheet margin, and elevated geothermal heat flux along the Iceland hotspot track inland. Outlet glaciers particularly susceptible to basal slip over deformable subglacial sediments include Jakobshavn, Helheim and Kangerdlussuaq, while geothermal warming and softening of basal ice may affect the onset of faster ice flow at Petermann Glacier and the Northeast Greenland Ice Stream. Interactions with the solid earth therefore control the past, present and future dynamics of the Greenland Ice Sheet and must be adequately explored and implemented in ice sheet models. Published 7307 1T. Struttura della Terra 5A. Ricerche polari e paleoclima JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia |
format |
Article in Journal/Newspaper |
author |
Jones, Glenn A Ferreira, Ana M. G. Kulessa, Bernd Schimmel, Martin Berbellini, Andrea Morelli, Andrea |
spellingShingle |
Jones, Glenn A Ferreira, Ana M. G. Kulessa, Bernd Schimmel, Martin Berbellini, Andrea Morelli, Andrea Uppermost crustal structure regulates the flow of the Greenland Ice Sheet |
author_facet |
Jones, Glenn A Ferreira, Ana M. G. Kulessa, Bernd Schimmel, Martin Berbellini, Andrea Morelli, Andrea |
author_sort |
Jones, Glenn A |
title |
Uppermost crustal structure regulates the flow of the Greenland Ice Sheet |
title_short |
Uppermost crustal structure regulates the flow of the Greenland Ice Sheet |
title_full |
Uppermost crustal structure regulates the flow of the Greenland Ice Sheet |
title_fullStr |
Uppermost crustal structure regulates the flow of the Greenland Ice Sheet |
title_full_unstemmed |
Uppermost crustal structure regulates the flow of the Greenland Ice Sheet |
title_sort |
uppermost crustal structure regulates the flow of the greenland ice sheet |
publisher |
Nature PG |
publishDate |
2021 |
url |
http://hdl.handle.net/2122/15144 https://www.nature.com/articles/s41467-021-27537-5 https://doi.org/10.1038/s41467-021-27537-5 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier glacier Greenland greenlandic Ice Sheet Iceland Jakobshavn Petermann glacier |
genre_facet |
glacier glacier Greenland greenlandic Ice Sheet Iceland Jakobshavn Petermann glacier |
op_relation |
Nature Communication /12 (2021) http://hdl.handle.net/2122/15144 https://www.nature.com/articles/s41467-021-27537-5 doi:10.1038/s41467-021-27537-5 |
op_rights |
open |
op_doi |
https://doi.org/10.1038/s41467-021-27537-5 |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
_version_ |
1766009159275249664 |