Geodetic observations for constraining mantle processes in Antarctica
Geodynamic processes in Antarctica such as glacial isostatic adjustment (GIA) and post-seismic deformation are measured by geo-detic observations such as global navigation satellite systems (GNSS) and satellite gravimetry. GNSS measurements have comprised both continuous measurements and episodic me...
Published in: | Geological Society, London, Memoirs |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | http://resolver.tudelft.nl/uuid:5f8109e1-4922-4a08-a77d-40ec4e3eec06 https://doi.org/10.1144/M56-2021-22 |
id |
fttudelft:oai:tudelft.nl:uuid:5f8109e1-4922-4a08-a77d-40ec4e3eec06 |
---|---|
record_format |
openpolar |
spelling |
fttudelft:oai:tudelft.nl:uuid:5f8109e1-4922-4a08-a77d-40ec4e3eec06 2024-04-28T07:54:45+00:00 Geodetic observations for constraining mantle processes in Antarctica Scheinert, Mirko (author) Engels, Olga (author) Schrama, Ernst (author) van der Wal, W. (author) Horwath, Martin (author) 2023 http://resolver.tudelft.nl/uuid:5f8109e1-4922-4a08-a77d-40ec4e3eec06 https://doi.org/10.1144/M56-2021-22 en eng http://www.scopus.com/inward/record.url?scp=85148290381&partnerID=8YFLogxK Geological Society Memoir--0435-4052--2a315ee3-913d-4126-8515-5c86070449ec http://resolver.tudelft.nl/uuid:5f8109e1-4922-4a08-a77d-40ec4e3eec06 https://doi.org/10.1144/M56-2021-22 © 2023 Mirko Scheinert, Olga Engels, Ernst Schrama, W. van der Wal, Martin Horwath journal article 2023 fttudelft https://doi.org/10.1144/M56-2021-22 2024-04-10T00:12:34Z Geodynamic processes in Antarctica such as glacial isostatic adjustment (GIA) and post-seismic deformation are measured by geo-detic observations such as global navigation satellite systems (GNSS) and satellite gravimetry. GNSS measurements have comprised both continuous measurements and episodic measurements since the mid-1990s. The estimated velocities typically reach an accuracy of 1 mm a −1 for horizontal velocities and 2 mm a −1 for vertical velocities. However, the elastic deformation due to present-day ice-load change needs to be considered accordingly. Space gravimetry derives mass changes from small variations in the inter-satellite distance of a pair of satellites, starting with the GRACE (Gravity Recovery and Climate Experiment) satellite mission in 2002 and continuing with the GRACE-FO (GRACE Follow-On) mission launched in 2018. The spatial resolution of the measurements is low (about 300 km) but the measurement error is homogeneous across Ant-arctica. The estimated trends contain signals from ice-mass change, and local and global GIA signals. To combine the strengths of the individual datasets, statistical combinations of GNSS, GRACE and satellite altimetry data have been developed. These combinations rely on realistic error estimates and assumptions of snow density. Nevertheless, they capture signals that are missing from geodynamic forward models such as the large uplift in the Amundsen Sea sector caused by a low-viscous response to century-scale ice-mass changes. Physical and Space Geodesy Astrodynamics & Space Missions Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Delft University of Technology: Institutional Repository Geological Society, London, Memoirs 56 1 295 313 |
institution |
Open Polar |
collection |
Delft University of Technology: Institutional Repository |
op_collection_id |
fttudelft |
language |
English |
description |
Geodynamic processes in Antarctica such as glacial isostatic adjustment (GIA) and post-seismic deformation are measured by geo-detic observations such as global navigation satellite systems (GNSS) and satellite gravimetry. GNSS measurements have comprised both continuous measurements and episodic measurements since the mid-1990s. The estimated velocities typically reach an accuracy of 1 mm a −1 for horizontal velocities and 2 mm a −1 for vertical velocities. However, the elastic deformation due to present-day ice-load change needs to be considered accordingly. Space gravimetry derives mass changes from small variations in the inter-satellite distance of a pair of satellites, starting with the GRACE (Gravity Recovery and Climate Experiment) satellite mission in 2002 and continuing with the GRACE-FO (GRACE Follow-On) mission launched in 2018. The spatial resolution of the measurements is low (about 300 km) but the measurement error is homogeneous across Ant-arctica. The estimated trends contain signals from ice-mass change, and local and global GIA signals. To combine the strengths of the individual datasets, statistical combinations of GNSS, GRACE and satellite altimetry data have been developed. These combinations rely on realistic error estimates and assumptions of snow density. Nevertheless, they capture signals that are missing from geodynamic forward models such as the large uplift in the Amundsen Sea sector caused by a low-viscous response to century-scale ice-mass changes. Physical and Space Geodesy Astrodynamics & Space Missions |
format |
Article in Journal/Newspaper |
author |
Scheinert, Mirko (author) Engels, Olga (author) Schrama, Ernst (author) van der Wal, W. (author) Horwath, Martin (author) |
spellingShingle |
Scheinert, Mirko (author) Engels, Olga (author) Schrama, Ernst (author) van der Wal, W. (author) Horwath, Martin (author) Geodetic observations for constraining mantle processes in Antarctica |
author_facet |
Scheinert, Mirko (author) Engels, Olga (author) Schrama, Ernst (author) van der Wal, W. (author) Horwath, Martin (author) |
author_sort |
Scheinert, Mirko (author) |
title |
Geodetic observations for constraining mantle processes in Antarctica |
title_short |
Geodetic observations for constraining mantle processes in Antarctica |
title_full |
Geodetic observations for constraining mantle processes in Antarctica |
title_fullStr |
Geodetic observations for constraining mantle processes in Antarctica |
title_full_unstemmed |
Geodetic observations for constraining mantle processes in Antarctica |
title_sort |
geodetic observations for constraining mantle processes in antarctica |
publishDate |
2023 |
url |
http://resolver.tudelft.nl/uuid:5f8109e1-4922-4a08-a77d-40ec4e3eec06 https://doi.org/10.1144/M56-2021-22 |
genre |
Amundsen Sea Antarc* Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica |
op_relation |
http://www.scopus.com/inward/record.url?scp=85148290381&partnerID=8YFLogxK Geological Society Memoir--0435-4052--2a315ee3-913d-4126-8515-5c86070449ec http://resolver.tudelft.nl/uuid:5f8109e1-4922-4a08-a77d-40ec4e3eec06 https://doi.org/10.1144/M56-2021-22 |
op_rights |
© 2023 Mirko Scheinert, Olga Engels, Ernst Schrama, W. van der Wal, Martin Horwath |
op_doi |
https://doi.org/10.1144/M56-2021-22 |
container_title |
Geological Society, London, Memoirs |
container_volume |
56 |
container_issue |
1 |
container_start_page |
295 |
op_container_end_page |
313 |
_version_ |
1797576796604989440 |