A GNSS velocity field for geophysical applications in Fennoscandia
In Fennoscandia, tectonics, Glacial Isostatic Adjustment (GIA), and climatic changes cause ongoing crustal deformation of some millimetres per year, both vertically and horizontally. These displacements of the Earth can be measured to a high degree of precision using a Global Navigation Satellite Sy...
Published in: | Journal of Geodynamics |
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ftoslouniv:oai:www.duo.uio.no:10852/91738 2023-05-15T16:11:52+02:00 A GNSS velocity field for geophysical applications in Fennoscandia Kierulf, Halfdan Pascal Steffen, Holger Barletta, Valentina R. Lidberg, Martin Johansson, Jan Kristiansen, Oddgeir Tarasov, Lev 2021-06-28T18:41:15Z http://hdl.handle.net/10852/91738 http://urn.nb.no/URN:NBN:no-94333 https://doi.org/10.1016/j.jog.2021.101845 EN eng http://urn.nb.no/URN:NBN:no-94333 Kierulf, Halfdan Pascal Steffen, Holger Barletta, Valentina R. Lidberg, Martin Johansson, Jan Kristiansen, Oddgeir Tarasov, Lev . A GNSS velocity field for geophysical applications in Fennoscandia. Journal of Geodynamics. 2021, 146 http://hdl.handle.net/10852/91738 1919106 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geodynamics&rft.volume=146&rft.spage=&rft.date=2021 Journal of Geodynamics 146 20 https://doi.org/10.1016/j.jog.2021.101845 URN:NBN:no-94333 Fulltext https://www.duo.uio.no/bitstream/handle/10852/91738/1/KierulfAGNSSvelocity.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0264-3707 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2021 ftoslouniv https://doi.org/10.1016/j.jog.2021.101845 2022-03-09T23:33:52Z In Fennoscandia, tectonics, Glacial Isostatic Adjustment (GIA), and climatic changes cause ongoing crustal deformation of some millimetres per year, both vertically and horizontally. These displacements of the Earth can be measured to a high degree of precision using a Global Navigation Satellite System (GNSS). Since about three decades, this is the major goal of the Baseline Inferences for Fennoscandian Rebound, Sea-level, and Tectonics (BIFROST) project. We present a new velocity field for an extended BIFROST GNSS network in the ITRF2008 reference frame making use of the GNSS processing package GPS Analysis Software of MIT (GAMIT). Compared to earlier publications, we have almost doubled the number of stations in our analysis and increased the observation time span, thereby avoiding the early years of the network with many instrument changes. We also provide modelled vertical deformation rates from contributing processes, i.e. elastic deformation due to global atmospheric and non-tidal ocean loading, ice mass and hydrological changes as well as GIA. These values for the vertical component can be used for removal of these contributions so that the residual uplift signal can be further analysed, e.g., in the context of local or regional deformation processes or large-scale but low-magnitude geodynamics. The velocity field has an uplift maximum of 10.3 mm/yr in northern Sweden west of the Gulf of Bothnia and subsidence exceeding 1 mm/yr in northern Central Europe. The horizontal velocity field is dominated by plate motion of more than 20.0 mm/yr from south-west to north-east. The elastic uplift signal sums up to 0.7–0.8 mm/yr for most stations in Northern Europe. Hence, the maximum uplift related to the past glaciation is ca. 9.6 mm/yr. The residual uplift signal after removal of the elastic and GIA contribution may point to possible improvements of the GIA model, but may also indicate regional tectonic and erosional processes as well as local deformation effects. We show an example of such residual signal discussing potential areas of interest for further studies. Article in Journal/Newspaper Fennoscandia Fennoscandian Northern Sweden Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Journal of Geodynamics 146 101845 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
In Fennoscandia, tectonics, Glacial Isostatic Adjustment (GIA), and climatic changes cause ongoing crustal deformation of some millimetres per year, both vertically and horizontally. These displacements of the Earth can be measured to a high degree of precision using a Global Navigation Satellite System (GNSS). Since about three decades, this is the major goal of the Baseline Inferences for Fennoscandian Rebound, Sea-level, and Tectonics (BIFROST) project. We present a new velocity field for an extended BIFROST GNSS network in the ITRF2008 reference frame making use of the GNSS processing package GPS Analysis Software of MIT (GAMIT). Compared to earlier publications, we have almost doubled the number of stations in our analysis and increased the observation time span, thereby avoiding the early years of the network with many instrument changes. We also provide modelled vertical deformation rates from contributing processes, i.e. elastic deformation due to global atmospheric and non-tidal ocean loading, ice mass and hydrological changes as well as GIA. These values for the vertical component can be used for removal of these contributions so that the residual uplift signal can be further analysed, e.g., in the context of local or regional deformation processes or large-scale but low-magnitude geodynamics. The velocity field has an uplift maximum of 10.3 mm/yr in northern Sweden west of the Gulf of Bothnia and subsidence exceeding 1 mm/yr in northern Central Europe. The horizontal velocity field is dominated by plate motion of more than 20.0 mm/yr from south-west to north-east. The elastic uplift signal sums up to 0.7–0.8 mm/yr for most stations in Northern Europe. Hence, the maximum uplift related to the past glaciation is ca. 9.6 mm/yr. The residual uplift signal after removal of the elastic and GIA contribution may point to possible improvements of the GIA model, but may also indicate regional tectonic and erosional processes as well as local deformation effects. We show an example of such residual signal discussing potential areas of interest for further studies. |
format |
Article in Journal/Newspaper |
author |
Kierulf, Halfdan Pascal Steffen, Holger Barletta, Valentina R. Lidberg, Martin Johansson, Jan Kristiansen, Oddgeir Tarasov, Lev |
spellingShingle |
Kierulf, Halfdan Pascal Steffen, Holger Barletta, Valentina R. Lidberg, Martin Johansson, Jan Kristiansen, Oddgeir Tarasov, Lev A GNSS velocity field for geophysical applications in Fennoscandia |
author_facet |
Kierulf, Halfdan Pascal Steffen, Holger Barletta, Valentina R. Lidberg, Martin Johansson, Jan Kristiansen, Oddgeir Tarasov, Lev |
author_sort |
Kierulf, Halfdan Pascal |
title |
A GNSS velocity field for geophysical applications in Fennoscandia |
title_short |
A GNSS velocity field for geophysical applications in Fennoscandia |
title_full |
A GNSS velocity field for geophysical applications in Fennoscandia |
title_fullStr |
A GNSS velocity field for geophysical applications in Fennoscandia |
title_full_unstemmed |
A GNSS velocity field for geophysical applications in Fennoscandia |
title_sort |
gnss velocity field for geophysical applications in fennoscandia |
publishDate |
2021 |
url |
http://hdl.handle.net/10852/91738 http://urn.nb.no/URN:NBN:no-94333 https://doi.org/10.1016/j.jog.2021.101845 |
genre |
Fennoscandia Fennoscandian Northern Sweden |
genre_facet |
Fennoscandia Fennoscandian Northern Sweden |
op_source |
0264-3707 |
op_relation |
http://urn.nb.no/URN:NBN:no-94333 Kierulf, Halfdan Pascal Steffen, Holger Barletta, Valentina R. Lidberg, Martin Johansson, Jan Kristiansen, Oddgeir Tarasov, Lev . A GNSS velocity field for geophysical applications in Fennoscandia. Journal of Geodynamics. 2021, 146 http://hdl.handle.net/10852/91738 1919106 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geodynamics&rft.volume=146&rft.spage=&rft.date=2021 Journal of Geodynamics 146 20 https://doi.org/10.1016/j.jog.2021.101845 URN:NBN:no-94333 Fulltext https://www.duo.uio.no/bitstream/handle/10852/91738/1/KierulfAGNSSvelocity.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.jog.2021.101845 |
container_title |
Journal of Geodynamics |
container_volume |
146 |
container_start_page |
101845 |
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1765997075046072320 |