What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica
An extensive grid of seismic reflection data collected on Ekstro¨m Ice Shelf, East Antarctica, between 2010–2018, using an on-ice vibroseis source and snowstreamer, are used to make a detailed bathymetry map of the sea floor and ice-shelf cavity. The maps shows a deep sea-floor trough, likely a pale...
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ftawi:oai:epic.awi.de:49605 2023-05-15T13:45:21+02:00 What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica Smith, Emma C. Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf 2019-04-12 application/pdf https://epic.awi.de/id/eprint/49605/ https://epic.awi.de/id/eprint/49605/1/EGU2019_ECSmith_7454.pdf https://meetingorganizer.copernicus.org/EGU2019/EGU2019-7454.pdf https://hdl.handle.net/10013/epic.022e4808-18fa-453c-9738-8e8f8ec5e5a7 https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/49605/1/EGU2019_ECSmith_7454.pdf https://hdl.handle.net/ Smith, E. C. orcid:0000-0002-8672-8259 , Drews, R. , Ehlers, T. , Franke, D. , Gaedicke, C. , Hofstede, C. orcid:0000-0002-6015-6918 , Kuhn, G. orcid:0000-0001-6069-7485 , Lambrecht, A. , Mayer, C. , Tiedemann, R. orcid:0000-0001-7211-8049 and Eisen, O. orcid:0000-0002-6380-962X (2019) What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica , European Geosceince Union (EGU) General Assembly, Vienna, Austria, 8 April 2019 - 12 April 2019 . hdl:10013/epic.022e4808-18fa-453c-9738-8e8f8ec5e5a7 EPIC3European Geosceince Union (EGU) General Assembly, Vienna, Austria, 2019-04-08-2019-04-12 Conference notRev 2019 ftawi 2021-12-24T15:44:42Z An extensive grid of seismic reflection data collected on Ekstro¨m Ice Shelf, East Antarctica, between 2010–2018, using an on-ice vibroseis source and snowstreamer, are used to make a detailed bathymetry map of the sea floor and ice-shelf cavity. The maps shows a deep sea-floor trough, likely a paleao-ice stream, under the western side of the ice shelf. The trough contains a number of points of higher topography, indicating probable former grounding line positions. At the shelf front a sill running across the width of the shelf has implications for ocean circulation and thus ice-ocean interaction and ice shelf melt. This new bathymetry is markedly different from previous models, which show a generally flat and shallow sea floor in the region. This is presumably the case for many of the smaller ice-shelves in Dronning Maud Land, which highlights the need for better bathymetry measurements in these key threshold regions Conference Object Antarc* Antarctica Dronning Maud Land East Antarctica Ice Shelf Ice Shelves Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) East Antarctica Dronning Maud Land |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
An extensive grid of seismic reflection data collected on Ekstro¨m Ice Shelf, East Antarctica, between 2010–2018, using an on-ice vibroseis source and snowstreamer, are used to make a detailed bathymetry map of the sea floor and ice-shelf cavity. The maps shows a deep sea-floor trough, likely a paleao-ice stream, under the western side of the ice shelf. The trough contains a number of points of higher topography, indicating probable former grounding line positions. At the shelf front a sill running across the width of the shelf has implications for ocean circulation and thus ice-ocean interaction and ice shelf melt. This new bathymetry is markedly different from previous models, which show a generally flat and shallow sea floor in the region. This is presumably the case for many of the smaller ice-shelves in Dronning Maud Land, which highlights the need for better bathymetry measurements in these key threshold regions |
format |
Conference Object |
author |
Smith, Emma C. Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf |
spellingShingle |
Smith, Emma C. Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica |
author_facet |
Smith, Emma C. Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf |
author_sort |
Smith, Emma C. |
title |
What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica |
title_short |
What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica |
title_full |
What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica |
title_fullStr |
What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica |
title_full_unstemmed |
What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica |
title_sort |
what lies beneath: a detailed bathymetry of the sea-floor below ekström ice shelf, east antarctica |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49605/ https://epic.awi.de/id/eprint/49605/1/EGU2019_ECSmith_7454.pdf https://meetingorganizer.copernicus.org/EGU2019/EGU2019-7454.pdf https://hdl.handle.net/10013/epic.022e4808-18fa-453c-9738-8e8f8ec5e5a7 https://hdl.handle.net/ |
geographic |
East Antarctica Dronning Maud Land |
geographic_facet |
East Antarctica Dronning Maud Land |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica Ice Shelf Ice Shelves |
op_source |
EPIC3European Geosceince Union (EGU) General Assembly, Vienna, Austria, 2019-04-08-2019-04-12 |
op_relation |
https://epic.awi.de/id/eprint/49605/1/EGU2019_ECSmith_7454.pdf https://hdl.handle.net/ Smith, E. C. orcid:0000-0002-8672-8259 , Drews, R. , Ehlers, T. , Franke, D. , Gaedicke, C. , Hofstede, C. orcid:0000-0002-6015-6918 , Kuhn, G. orcid:0000-0001-6069-7485 , Lambrecht, A. , Mayer, C. , Tiedemann, R. orcid:0000-0001-7211-8049 and Eisen, O. orcid:0000-0002-6380-962X (2019) What lies beneath: A detailed bathymetry of the sea-floor below Ekström Ice Shelf, East Antarctica , European Geosceince Union (EGU) General Assembly, Vienna, Austria, 8 April 2019 - 12 April 2019 . hdl:10013/epic.022e4808-18fa-453c-9738-8e8f8ec5e5a7 |
_version_ |
1766221602244001792 |