English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
 Local TagsRelease HistoryDetailsSummary
  The grounding zone of the Ekström Ice Shelf, East Antarctica – Geophysical characterization using GNSS, seismology and magnetotellurics

Fromm, T., Ritter, O., Weckmann, U., Heidrich-Meisner, K., Scheinert, M., Fofonova, V. (2023): The grounding zone of the Ekström Ice Shelf, East Antarctica – Geophysical characterization using GNSS, seismology and magnetotellurics, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0152

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016386 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016386_2
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Fromm, Tanja1, Author
Ritter, Oliver1, Author
Weckmann, Ute1, Author
Heidrich-Meisner, Karl1, Author
Scheinert, Mirko1, Author
Fofonova, Vera1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: Antarctica’s ice shelves are a highly critical component for the interlinkage between ice sheet and ocean. Their shape and evolution play an important role for the strength of ice mass loss, e.g. by amplification or weakening of the buttressing effect. Ocean tides are the most important direct forces acting on the ice shelves, inducing vertical and horizontal motion and deformation. In our study we investigate the effect of ocean tides on the Ekström Ice Shelf. The northward flow of the ice is mainly modulated by the tidal constituents at the ter-diurnal and quarter-diurnal bands, whereas the dominant vertical tides have a diurnal and semi-diurnal periodicity and amplitudes up to ten times larger than the ter- and quarter-diurnal tides. The causes of the higher frequency tidal modulations are still poorly understood. The area of the largest effect of the higher frequency tides is assumed to be the grounding zone of the ice streams feeding the ice shelf. Here we present first results of geophysical experiments at the grounding zone of the Ekström Ice Shelf conducted in the field seasons 2021/2022 and 2022/2023. In 2021/2022 we setup GNSS and seismic stations to record vertical and horizontal motion of the ice as well as seismic events in order to gain insights into ice dynamics and ground properties. In season 2022/2023 GNSS and seismic station were dismantled, and the experiments were complemented by magnetotelluric measurements to image the sub-ice ocean-land transition and the crustal structure beneath the ice stream.

Details

show
hide
Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-0152
 Degree: -

Event

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

Legal Case

show

Project information

show

Source 1

show
hide
Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -