Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers

Synthetic Aperture Radar (SAR) has been used extensively to determine the surface ice flow velocity of tidewater glaciers and investigate changes in seasonal or annual ice dynamics at medium spatial resolution (⩾100 m). However, assessing tidewater glacier behaviour at these resolutions risks missin...

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Autores: Fahrner, Dominik, González, Pablo J., Mair, Douglas W. F., Lea, James M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/367941
Acceso en línea:http://hdl.handle.net/10261/367941
Access Level:acceso abierto
Palabra clave:Arctic glaciology
ice dynamics
ice velocity
iceberg calving
remote sensing
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
tidewater glaciers
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oai_identifier_str oai:digital.csic.es:10261/367941
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
title Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
spellingShingle Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
Fahrner, Dominik
Arctic glaciology
ice dynamics
ice velocity
iceberg calving
remote sensing
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
tidewater glaciers
title_short Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
title_full Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
title_fullStr Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
title_full_unstemmed Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
title_sort Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciers
dc.creator.none.fl_str_mv Fahrner, Dominik
González, Pablo J.
Mair, Douglas W. F.
Lea, James M.
author Fahrner, Dominik
author_facet Fahrner, Dominik
González, Pablo J.
Mair, Douglas W. F.
Lea, James M.
author_role author
author2 González, Pablo J.
Mair, Douglas W. F.
Lea, James M.
author2_role author
author
author
dc.contributor.none.fl_str_mv University of Liverpool
UK Research and Innovation
Natural Environment Research Council (UK)
Centre for the Observation and Modeling of Earthquakes and Tectonics (UK)
Agencia Estatal de Investigación (España)
Ministerio de Ciencia e Innovación (España)
European Commission
Fahrner, Dominik [0000-0002-7895-1557]
González, Pablo J. [0000-0002-1767-1164]
Mair, Douglas W. F. [0000-0001-7009-5461]
Lea, James M. [0000-0003-1885-0858]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Arctic glaciology
ice dynamics
ice velocity
iceberg calving
remote sensing
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
tidewater glaciers
topic Arctic glaciology
ice dynamics
ice velocity
iceberg calving
remote sensing
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
tidewater glaciers
description Synthetic Aperture Radar (SAR) has been used extensively to determine the surface ice flow velocity of tidewater glaciers and investigate changes in seasonal or annual ice dynamics at medium spatial resolution (⩾100 m). However, assessing tidewater glacier behaviour at these resolutions risks missing key details of glacier dynamics, which is particularly important for determination of strain rates that relate to crevasse formation, depth, and ice damage. Here we present surface ice velocity and strain maps with a 16 m posting derived from high-resolution (1 m) PAZ Ciencia spotlight mode SAR imagery for Narsap Sermia, SW Greenland, for October 2019 to February 2021. Results reveal fine details in strain rate, including an area of compression proximal to the terminus, with an upstream shift of strains through time. The velocity evolution of Narsap Sermia shows distinct seasonal changes starting in summer 2020, which are largely modulated by the subglacial drainage system. Comparison of our results with medium-resolution velocity products shows that while these can capture general strain and velocity patterns, our high-resolution data reveals considerably larger ranges of strain values. This is likely to have implications for tuning strain rate dependent calving and ice damage parameterisations within numerical models.
publishDate 2024
dc.date.none.fl_str_mv 2024
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/10261/367941
url http://hdl.handle.net/10261/367941
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104571RA-I00
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-139159NB-I00
https://doi.org/10.1017/jog.2024.63
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Cambridge University Press
publisher.none.fl_str_mv Cambridge University Press
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
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spelling Implications of high-resolution velocity and strain rate observations for modelling of Greenlandic tidewater glaciersFahrner, DominikGonzález, Pablo J.Mair, Douglas W. F.Lea, James M.Arctic glaciologyice dynamicsice velocityiceberg calvingremote sensinghttp://metadata.un.org/sdg/15Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity losstidewater glaciersSynthetic Aperture Radar (SAR) has been used extensively to determine the surface ice flow velocity of tidewater glaciers and investigate changes in seasonal or annual ice dynamics at medium spatial resolution (⩾100 m). However, assessing tidewater glacier behaviour at these resolutions risks missing key details of glacier dynamics, which is particularly important for determination of strain rates that relate to crevasse formation, depth, and ice damage. Here we present surface ice velocity and strain maps with a 16 m posting derived from high-resolution (1 m) PAZ Ciencia spotlight mode SAR imagery for Narsap Sermia, SW Greenland, for October 2019 to February 2021. Results reveal fine details in strain rate, including an area of compression proximal to the terminus, with an upstream shift of strains through time. The velocity evolution of Narsap Sermia shows distinct seasonal changes starting in summer 2020, which are largely modulated by the subglacial drainage system. Comparison of our results with medium-resolution velocity products shows that while these can capture general strain and velocity patterns, our high-resolution data reveals considerably larger ranges of strain values. This is likely to have implications for tuning strain rate dependent calving and ice damage parameterisations within numerical models.D. F. would like to acknowledge the support of this work through the EPSRC and ESRC Centre for Doctoral Training on Quantification and Management of Risk and Uncertainty in Complex System Environments Grant No. (EP/L015927/1). J. M. L. is supported by a UKRI Future Leaders Fellowship (Grant No. MR/S017232/1). P. J. G.'s work was partially supported by the Natural Environmental Research Council (NERC) through the Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics (GA/13/M/031). P. J. G. also thanks the Spanish Agencia Estatal de Investigación project PID2019-104571RA-I00 (COMPACT) funded by MCIN/AEI/10.13039/501100011033, and project PID2022-139159NB-I00 (Volca-Motion) funded by MCIN/AEI/10.13039/501100011033 and ‘FEDER Una manera de hacer Europa’. All high-resolution PAZ SAR images are part of the project: Evaluating the impact of PAZ spotlight mode data on tracking tidewater glacier dynamics and assessing the iceberg risk to Greenland's largest port (AO_001_019). The authors would like to thank two anonymous reviewers and the editor Hester Jiskoot for their constructive and helpful comments.Peer reviewedCambridge University PressUniversity of LiverpoolUK Research and InnovationNatural Environment Research Council (UK)Centre for the Observation and Modeling of Earthquakes and Tectonics (UK)Agencia Estatal de Investigación (España)Ministerio de Ciencia e Innovación (España)European CommissionFahrner, Dominik [0000-0002-7895-1557]González, Pablo J. [0000-0002-1767-1164]Mair, Douglas W. F. [0000-0001-7009-5461]Lea, James M. [0000-0003-1885-0858]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/367941reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-104571RA-I00info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-139159NB-I00https://doi.org/10.1017/jog.2024.63Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3679412026-05-22T06:33:51Z
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