Time-varying uplift in Svalbard—an effect of glacial changes
International audience SUMMARY We analyse Global Navigation Satellite System (GNSS) data from Svalbard to understand how uplift rates are controlled by the elastic and viscoelastic response of the solid Earth to changes in glacier mass on annual, interannual, decadal, centennial and millennial times...
Published in: | Geophysical Journal International |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03745732 https://hal.archives-ouvertes.fr/hal-03745732/document https://hal.archives-ouvertes.fr/hal-03745732/file/ggac264.pdf https://doi.org/10.1093/gji/ggac264 |
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ftunivnantes:oai:HAL:hal-03745732v1 |
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openpolar |
institution |
Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Kierulf, Halfdan Pascal Kohler, Jack Boy, Jean-Paul Geyman, Emily Mémin, Anthony Omang, Ove Steffen, Holger Steffen, Rebekka Time-varying uplift in Svalbard—an effect of glacial changes |
topic_facet |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience SUMMARY We analyse Global Navigation Satellite System (GNSS) data from Svalbard to understand how uplift rates are controlled by the elastic and viscoelastic response of the solid Earth to changes in glacier mass on annual, interannual, decadal, centennial and millennial timescales. To reveal local patterns of deformation, we filter the GNSS time-series with an enhanced common-mode filtering technique where the non-tidal loading signal is incorporated. This technique reduces the estimated uncertainties for 5-yr time-series from 0.8 to 0.3 mm yr–1. Analysis of the GNSS data with different software–GAMIT, GipsyX, and GINS–produce consistent results that all indicate large temporal variations in uplift. For example, at the Ny-Ålesund GNSS station, uplift varies between 6 and 12 mm yr–1 for different 5-yr periods, and also shows a significant increase in the last 15 yr. We show that this increase is due to climate change-related ice mass loss in Svalbard. We constrain recent glacier retreat on Svalbard using a series of digital elevation models, and then correct the GNSS-derived uplift records for the elastic signal from these ice mass changes. The residual uplift signal is relatively constant, confirming the hypothesis that current ice mass changes exert a strong influence on GNSS observations. The relatively constant record of residual uplift can be used to constrain other geophysical signals such as the viscoelastic response of the solid Earth to ice loading during the Little Ice Age and the Last Glacial Period. We review uplift results from previous viscoelastic modelling studies and show that the residual signal cannot yet be fully explained. Our new uplift results thus motivate the need for new viscoelastic modelling of the glacial isostatic adjustment process in Svalbard. |
author2 |
Institut Terre Environnement Strasbourg (ITES) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Ecole et Observatoire des Sciences de la Terre (EOST) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) |
format |
Article in Journal/Newspaper |
author |
Kierulf, Halfdan Pascal Kohler, Jack Boy, Jean-Paul Geyman, Emily Mémin, Anthony Omang, Ove Steffen, Holger Steffen, Rebekka |
author_facet |
Kierulf, Halfdan Pascal Kohler, Jack Boy, Jean-Paul Geyman, Emily Mémin, Anthony Omang, Ove Steffen, Holger Steffen, Rebekka |
author_sort |
Kierulf, Halfdan Pascal |
title |
Time-varying uplift in Svalbard—an effect of glacial changes |
title_short |
Time-varying uplift in Svalbard—an effect of glacial changes |
title_full |
Time-varying uplift in Svalbard—an effect of glacial changes |
title_fullStr |
Time-varying uplift in Svalbard—an effect of glacial changes |
title_full_unstemmed |
Time-varying uplift in Svalbard—an effect of glacial changes |
title_sort |
time-varying uplift in svalbard—an effect of glacial changes |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.archives-ouvertes.fr/hal-03745732 https://hal.archives-ouvertes.fr/hal-03745732/document https://hal.archives-ouvertes.fr/hal-03745732/file/ggac264.pdf https://doi.org/10.1093/gji/ggac264 |
geographic |
Svalbard Ny-Ålesund |
geographic_facet |
Svalbard Ny-Ålesund |
genre |
glacier Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
glacier Ny Ålesund Ny-Ålesund Svalbard |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.archives-ouvertes.fr/hal-03745732 Geophysical Journal International, Oxford University Press (OUP), 2022, 231 (3), pp.1518-1534. ⟨10.1093/gji/ggac264⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggac264 hal-03745732 https://hal.archives-ouvertes.fr/hal-03745732 https://hal.archives-ouvertes.fr/hal-03745732/document https://hal.archives-ouvertes.fr/hal-03745732/file/ggac264.pdf doi:10.1093/gji/ggac264 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1093/gji/ggac264 |
container_title |
Geophysical Journal International |
container_volume |
231 |
container_issue |
3 |
container_start_page |
1518 |
op_container_end_page |
1534 |
_version_ |
1766010143995068416 |
spelling |
ftunivnantes:oai:HAL:hal-03745732v1 2023-05-15T16:22:10+02:00 Time-varying uplift in Svalbard—an effect of glacial changes Kierulf, Halfdan Pascal Kohler, Jack Boy, Jean-Paul Geyman, Emily Mémin, Anthony Omang, Ove Steffen, Holger Steffen, Rebekka Institut Terre Environnement Strasbourg (ITES) École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Ecole et Observatoire des Sciences de la Terre (EOST) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) 2022-12-03 https://hal.archives-ouvertes.fr/hal-03745732 https://hal.archives-ouvertes.fr/hal-03745732/document https://hal.archives-ouvertes.fr/hal-03745732/file/ggac264.pdf https://doi.org/10.1093/gji/ggac264 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggac264 hal-03745732 https://hal.archives-ouvertes.fr/hal-03745732 https://hal.archives-ouvertes.fr/hal-03745732/document https://hal.archives-ouvertes.fr/hal-03745732/file/ggac264.pdf doi:10.1093/gji/ggac264 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.archives-ouvertes.fr/hal-03745732 Geophysical Journal International, Oxford University Press (OUP), 2022, 231 (3), pp.1518-1534. ⟨10.1093/gji/ggac264⟩ [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1093/gji/ggac264 2022-08-09T23:34:23Z International audience SUMMARY We analyse Global Navigation Satellite System (GNSS) data from Svalbard to understand how uplift rates are controlled by the elastic and viscoelastic response of the solid Earth to changes in glacier mass on annual, interannual, decadal, centennial and millennial timescales. To reveal local patterns of deformation, we filter the GNSS time-series with an enhanced common-mode filtering technique where the non-tidal loading signal is incorporated. This technique reduces the estimated uncertainties for 5-yr time-series from 0.8 to 0.3 mm yr–1. Analysis of the GNSS data with different software–GAMIT, GipsyX, and GINS–produce consistent results that all indicate large temporal variations in uplift. For example, at the Ny-Ålesund GNSS station, uplift varies between 6 and 12 mm yr–1 for different 5-yr periods, and also shows a significant increase in the last 15 yr. We show that this increase is due to climate change-related ice mass loss in Svalbard. We constrain recent glacier retreat on Svalbard using a series of digital elevation models, and then correct the GNSS-derived uplift records for the elastic signal from these ice mass changes. The residual uplift signal is relatively constant, confirming the hypothesis that current ice mass changes exert a strong influence on GNSS observations. The relatively constant record of residual uplift can be used to constrain other geophysical signals such as the viscoelastic response of the solid Earth to ice loading during the Little Ice Age and the Last Glacial Period. We review uplift results from previous viscoelastic modelling studies and show that the residual signal cannot yet be fully explained. Our new uplift results thus motivate the need for new viscoelastic modelling of the glacial isostatic adjustment process in Svalbard. Article in Journal/Newspaper glacier Ny Ålesund Ny-Ålesund Svalbard Université de Nantes: HAL-UNIV-NANTES Svalbard Ny-Ålesund Geophysical Journal International 231 3 1518 1534 |