Simulating the Laurentide Ice Sheet of the Last Glacial Maximum

In the last decades, great effort has been made to reconstruct the Laurentide Ice Sheet (LIS) during the Last Glacial Maximum (LGM; ca. 21000 years before present, 21kyr ago). Uncertainties underlying its modelling have led to notable differences in fundamental features such as its maximum elevation...

ver descrição completa

Detalhes bibliográficos
Autores: Moreno-Parada, Daniel, Álvarez-Solas, J., Blasco, Javier, Montoya, Marisa, Robinson, Alexander
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/359530
Acesso em linha:http://hdl.handle.net/10261/359530
https://api.elsevier.com/content/abstract/scopus_id/85163656529
Access Level:acceso abierto
id ES_4c3e05b3bf2c4e0487bbf3d1a63a285b
oai_identifier_str oai:digital.csic.es:10261/359530
network_acronym_str ES
network_name_str España
repository_id_str
spelling Simulating the Laurentide Ice Sheet of the Last Glacial MaximumMoreno-Parada, DanielÁlvarez-Solas, J.Blasco, JavierMontoya, MarisaRobinson, AlexanderIn the last decades, great effort has been made to reconstruct the Laurentide Ice Sheet (LIS) during the Last Glacial Maximum (LGM; ca. 21000 years before present, 21kyr ago). Uncertainties underlying its modelling have led to notable differences in fundamental features such as its maximum elevation, extent and total volume. As a result, the uncertainty in ice dynamics and thus in ice extent, volume and ice stream stability remains large. We herein use a higher-order three-dimensional ice sheet model to simulate the LIS under LGM boundary conditions for a number of basal friction formulations of varying complexity. Their consequences for the Laurentide ice streams, configuration, extent and volume are explicitly quantified. Total volume and ice extent generally reach a constant equilibrium value that falls close to prior LIS reconstructions. Simulations exhibit high sensitivity to the dependency of the basal shear stress on the sliding velocity. In particular, a regularised Coulomb friction formulation appears to be the best choice in terms of ice volume and ice stream realism. Pronounced differences are found when the basal friction stress is thermomechanically coupled: the base remains colder, and the LIS volume is lower than in the purely mechanical friction scenario counterpart. Thermomechanical coupling is fundamental for producing rapid ice streaming, yet it leads to a similar ice distribution overall.We thank Félix Garcia-Pereira for suggesting the two-phase regression method to determine the equilibration time. We are grateful to Julien Seguinot, Niall Gandy and the editor Chris R. Stokes for their comments, which have greatly improved our paper. Financial support This research has been supported by the Spanish Ministry of Science and Innovation (project IceAge, grant no. PID2019-110714RA-100) and the Ramón y Cajal programme of the Spanish Ministry of Science and Innovation and the Spanish Ministry of Universities (grant no. RYC-2016-20587). This research is TiPES contribution no. 183 and has been supported by the European Union Horizon 2020 research and innovation programme (grant no. 820970).Peer reviewedEuropean Geosciences UnionMinisterio de Ciencia e Innovación (España)Moreno-Parada, Daniel [0000-0002-8480-4510]Alvarez-Solas, Jorge [0000-0002-2969-0442]Blasco, Javier [0000-0001-5898-5904]Montoya, Marisa [0000-0002-0090-4750]Robinson, Alexander [0000-0003-3519-5293]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/359530https://api.elsevier.com/content/abstract/scopus_id/85163656529reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-110714RA-I00Cryospherehttps://doi.org/10.5194/tc-17-2139-2023Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3595302026-05-22T06:33:51Z
dc.title.none.fl_str_mv Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
title Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
spellingShingle Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
Moreno-Parada, Daniel
title_short Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
title_full Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
title_fullStr Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
title_full_unstemmed Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
title_sort Simulating the Laurentide Ice Sheet of the Last Glacial Maximum
dc.creator.none.fl_str_mv Moreno-Parada, Daniel
Álvarez-Solas, J.
Blasco, Javier
Montoya, Marisa
Robinson, Alexander
author Moreno-Parada, Daniel
author_facet Moreno-Parada, Daniel
Álvarez-Solas, J.
Blasco, Javier
Montoya, Marisa
Robinson, Alexander
author_role author
author2 Álvarez-Solas, J.
Blasco, Javier
Montoya, Marisa
Robinson, Alexander
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Moreno-Parada, Daniel [0000-0002-8480-4510]
Alvarez-Solas, Jorge [0000-0002-2969-0442]
Blasco, Javier [0000-0001-5898-5904]
Montoya, Marisa [0000-0002-0090-4750]
Robinson, Alexander [0000-0003-3519-5293]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description In the last decades, great effort has been made to reconstruct the Laurentide Ice Sheet (LIS) during the Last Glacial Maximum (LGM; ca. 21000 years before present, 21kyr ago). Uncertainties underlying its modelling have led to notable differences in fundamental features such as its maximum elevation, extent and total volume. As a result, the uncertainty in ice dynamics and thus in ice extent, volume and ice stream stability remains large. We herein use a higher-order three-dimensional ice sheet model to simulate the LIS under LGM boundary conditions for a number of basal friction formulations of varying complexity. Their consequences for the Laurentide ice streams, configuration, extent and volume are explicitly quantified. Total volume and ice extent generally reach a constant equilibrium value that falls close to prior LIS reconstructions. Simulations exhibit high sensitivity to the dependency of the basal shear stress on the sliding velocity. In particular, a regularised Coulomb friction formulation appears to be the best choice in terms of ice volume and ice stream realism. Pronounced differences are found when the basal friction stress is thermomechanically coupled: the base remains colder, and the LIS volume is lower than in the purely mechanical friction scenario counterpart. Thermomechanical coupling is fundamental for producing rapid ice streaming, yet it leads to a similar ice distribution overall.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/359530
https://api.elsevier.com/content/abstract/scopus_id/85163656529
url http://hdl.handle.net/10261/359530
https://api.elsevier.com/content/abstract/scopus_id/85163656529
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-110714RA-I00
Cryosphere
https://doi.org/10.5194/tc-17-2139-2023
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv European Geosciences Union
publisher.none.fl_str_mv European Geosciences Union
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869407614753832960
score 15.812429

Registos relacionados