Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica
Geodetic GNSS measurements on bedrock allow to determine secular trends of solid Earth deformation and, therefore, provide valuable constraints for modelling glacial-isostatic adjustment (GIA). There is a high discrepancy in GIA model predictions of vertical displacement rates in Antarctica regardin...
Main Authors: | , , , , , , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019542 |
id |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5019542 |
---|---|
record_format |
openpolar |
spelling |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5019542 2023-07-16T03:52:22+02:00 Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica Buchta, E. Scheinert, M. Willen, M. Kappelsberger, M. Eberlein, L. Schröter, B. Knöfel, C. Horwath, M. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019542 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3435 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019542 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-3435 2023-06-25T23:39:53Z Geodetic GNSS measurements on bedrock allow to determine secular trends of solid Earth deformation and, therefore, provide valuable constraints for modelling glacial-isostatic adjustment (GIA). There is a high discrepancy in GIA model predictions of vertical displacement rates in Antarctica regarding their spatial pattern and magnitude. While in West Antarctica, in the Antarctic Peninsula and in parts of Victoria Land a comparably large number of GNSS stations exists, East Antarctica exhibits big gaps in the GNSS coverage. The sparsity of bedrock outcrops and the difficult accessibility and logistics are reasons for this.In order to improve the spatial coverage we established a GNSS network in western and central Dronning Maud Land, East Antarctica, with first observations carried out already in the mid-1990ies and a latest observation campaign realized in the Antarctic season 2022/2023. Here we present results of a consistent processing of all episodic and permanent GNSS measurements in that region. We discuss how the long time basis of more than 20 years helps to improve the accuracy of the secular trend inferred from the GNSS time series. We remove the elastic deformation due to present-day ice-mass changes utilizing satellite altimetry observations and surface mass balance models. We discuss our resulting trends in comparison to existing GIA models in a region sparsely covered by GNSS prior to this study. Conference Object Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Victoria Land West Antarctica GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica The Antarctic Victoria Land West Antarctica |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Geodetic GNSS measurements on bedrock allow to determine secular trends of solid Earth deformation and, therefore, provide valuable constraints for modelling glacial-isostatic adjustment (GIA). There is a high discrepancy in GIA model predictions of vertical displacement rates in Antarctica regarding their spatial pattern and magnitude. While in West Antarctica, in the Antarctic Peninsula and in parts of Victoria Land a comparably large number of GNSS stations exists, East Antarctica exhibits big gaps in the GNSS coverage. The sparsity of bedrock outcrops and the difficult accessibility and logistics are reasons for this.In order to improve the spatial coverage we established a GNSS network in western and central Dronning Maud Land, East Antarctica, with first observations carried out already in the mid-1990ies and a latest observation campaign realized in the Antarctic season 2022/2023. Here we present results of a consistent processing of all episodic and permanent GNSS measurements in that region. We discuss how the long time basis of more than 20 years helps to improve the accuracy of the secular trend inferred from the GNSS time series. We remove the elastic deformation due to present-day ice-mass changes utilizing satellite altimetry observations and surface mass balance models. We discuss our resulting trends in comparison to existing GIA models in a region sparsely covered by GNSS prior to this study. |
format |
Conference Object |
author |
Buchta, E. Scheinert, M. Willen, M. Kappelsberger, M. Eberlein, L. Schröter, B. Knöfel, C. Horwath, M. |
spellingShingle |
Buchta, E. Scheinert, M. Willen, M. Kappelsberger, M. Eberlein, L. Schröter, B. Knöfel, C. Horwath, M. Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica |
author_facet |
Buchta, E. Scheinert, M. Willen, M. Kappelsberger, M. Eberlein, L. Schröter, B. Knöfel, C. Horwath, M. |
author_sort |
Buchta, E. |
title |
Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica |
title_short |
Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica |
title_full |
Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica |
title_fullStr |
Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Geodetic GNSS observations disclose the response of the solid Earth to changing ice masses in Dronning Maud Land, East Antarctica |
title_sort |
geodetic gnss observations disclose the response of the solid earth to changing ice masses in dronning maud land, east antarctica |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019542 |
geographic |
Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica The Antarctic Victoria Land West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Dronning Maud Land East Antarctica The Antarctic Victoria Land West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Victoria Land West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Dronning Maud Land East Antarctica Victoria Land West Antarctica |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3435 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019542 |
op_doi |
https://doi.org/10.57757/IUGG23-3435 |
_version_ |
1771545359503327232 |