Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica
Abstract Ice shelves, which regulate ice flow from the Antarctic ice sheet towards the ocean, are shaped by spatiotemporal patterns of surface accumulation, surface/basal melt and ice dynamics. Therefore, an ice dynamic and accumulation history are imprinted in the internal ice stratigraphy, which c...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/jog.2023.93 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302300093X |
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crcambridgeupr:10.1017/jog.2023.93 2024-09-30T14:26:17+00:00 Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica Koch, Inka Drews, Reinhard Franke, Steven Jansen, Daniela Oraschewski, Falk Marius Muhle, Leah Sophie Višnjević, Vjeran Matsuoka, Kenichi Pattyn, Frank Eisen, Olaf Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Studienstiftung des Deutschen Volkes Deutsche Forschungsgemeinschaft 2023 http://dx.doi.org/10.1017/jog.2023.93 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302300093X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology page 1-19 ISSN 0022-1430 1727-5652 journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.93 2024-09-04T04:04:45Z Abstract Ice shelves, which regulate ice flow from the Antarctic ice sheet towards the ocean, are shaped by spatiotemporal patterns of surface accumulation, surface/basal melt and ice dynamics. Therefore, an ice dynamic and accumulation history are imprinted in the internal ice stratigraphy, which can be imaged by radar in the form of internal reflection horizons (IRHs). Here, IRHs were derived from radar data combined across radar platforms (airborne and ground-based) in coastal eastern Dronning Maud Land (East Antarctica), comprising three ice rises and adjacent two ice shelves. To facilitate interpretation of dominant spatiotemporal patterns of processes shaping the local IRH geometry, traced IRHs are classified into three different types (laterally continuous, discontinuous or absent/IRH-free). Near-surface laterally continuous IRHs reveal local accumulation patterns, reflecting the mean easterly wind direction, and correlate with surface slopes. Areas of current and past increased ice flow and internal deformation are marked by discontinuous or IRH-free zones, and can inform about paleo ice-stream dynamics. The established IRH datasets extend continent-wide mapping efforts of IRHs to an important and climatically sensitive ice marginal region of Antarctica and are ready for integration into ice-flow models to improve predictions of Antarctic ice drainage. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelves Journal of Glaciology Princess Ragnhild Coast Cambridge University Press Antarctic The Antarctic East Antarctica Dronning Maud Land Princess Ragnhild Coast ENVELOPE(27.000,27.000,-70.500,-70.500) Journal of Glaciology 1 19 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Ice shelves, which regulate ice flow from the Antarctic ice sheet towards the ocean, are shaped by spatiotemporal patterns of surface accumulation, surface/basal melt and ice dynamics. Therefore, an ice dynamic and accumulation history are imprinted in the internal ice stratigraphy, which can be imaged by radar in the form of internal reflection horizons (IRHs). Here, IRHs were derived from radar data combined across radar platforms (airborne and ground-based) in coastal eastern Dronning Maud Land (East Antarctica), comprising three ice rises and adjacent two ice shelves. To facilitate interpretation of dominant spatiotemporal patterns of processes shaping the local IRH geometry, traced IRHs are classified into three different types (laterally continuous, discontinuous or absent/IRH-free). Near-surface laterally continuous IRHs reveal local accumulation patterns, reflecting the mean easterly wind direction, and correlate with surface slopes. Areas of current and past increased ice flow and internal deformation are marked by discontinuous or IRH-free zones, and can inform about paleo ice-stream dynamics. The established IRH datasets extend continent-wide mapping efforts of IRHs to an important and climatically sensitive ice marginal region of Antarctica and are ready for integration into ice-flow models to improve predictions of Antarctic ice drainage. |
author2 |
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Studienstiftung des Deutschen Volkes Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Koch, Inka Drews, Reinhard Franke, Steven Jansen, Daniela Oraschewski, Falk Marius Muhle, Leah Sophie Višnjević, Vjeran Matsuoka, Kenichi Pattyn, Frank Eisen, Olaf |
spellingShingle |
Koch, Inka Drews, Reinhard Franke, Steven Jansen, Daniela Oraschewski, Falk Marius Muhle, Leah Sophie Višnjević, Vjeran Matsuoka, Kenichi Pattyn, Frank Eisen, Olaf Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica |
author_facet |
Koch, Inka Drews, Reinhard Franke, Steven Jansen, Daniela Oraschewski, Falk Marius Muhle, Leah Sophie Višnjević, Vjeran Matsuoka, Kenichi Pattyn, Frank Eisen, Olaf |
author_sort |
Koch, Inka |
title |
Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica |
title_short |
Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica |
title_full |
Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica |
title_fullStr |
Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica |
title_sort |
radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the princess ragnhild coast, dronning maud land, east antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.93 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302300093X |
long_lat |
ENVELOPE(27.000,27.000,-70.500,-70.500) |
geographic |
Antarctic The Antarctic East Antarctica Dronning Maud Land Princess Ragnhild Coast |
geographic_facet |
Antarctic The Antarctic East Antarctica Dronning Maud Land Princess Ragnhild Coast |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelves Journal of Glaciology Princess Ragnhild Coast |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelves Journal of Glaciology Princess Ragnhild Coast |
op_source |
Journal of Glaciology page 1-19 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.93 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
19 |
_version_ |
1811646698090397696 |