Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica
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 ima...
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Cambridge University Press
2024-01-01
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| Series: | Journal of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S002214302300093X/type/journal_article |
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| author | Inka Koch Reinhard Drews Steven Franke Daniela Jansen Falk Marius Oraschewski Leah Sophie Muhle Vjeran Višnjević Kenichi Matsuoka Frank Pattyn Olaf Eisen |
| author_facet | Inka Koch Reinhard Drews Steven Franke Daniela Jansen Falk Marius Oraschewski Leah Sophie Muhle Vjeran Višnjević Kenichi Matsuoka Frank Pattyn Olaf Eisen |
| author_sort | Inka Koch |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-c4535e700ddb48fd8461982a7912cef0 |
| institution | Kabale University |
| issn | 0022-1430 1727-5652 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Glaciology |
| spelling | doaj-art-c4535e700ddb48fd8461982a7912cef02025-01-16T21:52:17ZengCambridge University PressJournal of Glaciology0022-14301727-56522024-01-017010.1017/jog.2023.93Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East AntarcticaInka Koch0https://orcid.org/0000-0002-8801-7215Reinhard Drews1https://orcid.org/0000-0002-2328-294XSteven Franke2https://orcid.org/0000-0001-8462-4379Daniela Jansen3https://orcid.org/0000-0002-4412-5820Falk Marius Oraschewski4https://orcid.org/0000-0001-7287-2965Leah Sophie Muhle5https://orcid.org/0009-0000-8363-8963Vjeran Višnjević6https://orcid.org/0000-0003-3613-0539Kenichi Matsuoka7https://orcid.org/0000-0002-3587-3405Frank Pattyn8https://orcid.org/0000-0003-4805-5636Olaf Eisen9https://orcid.org/0000-0002-6380-962XDepartment of Geosciences, University of Tübingen, Tübingen, GermanyDepartment of Geosciences, University of Tübingen, Tübingen, GermanyDepartment of Geosciences, University of Tübingen, Tübingen, Germany Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Sciences, Bremerhaven, GermanyAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Sciences, Bremerhaven, GermanyDepartment of Geosciences, University of Tübingen, Tübingen, GermanyDepartment of Geosciences, University of Tübingen, Tübingen, GermanyDepartment of Geosciences, University of Tübingen, Tübingen, GermanyNorwegian Polar Institute, Tromsø, NorwayLaboratoire de Glaciologie, Université libre de Bruxelles, Brussels, BelgiumAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Sciences, Bremerhaven, Germany Department of Geosciences, University of Bremen, Bremen, GermanyIce 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.https://www.cambridge.org/core/product/identifier/S002214302300093X/type/journal_articleairborne electromagnetic soundingsAntarctic glaciologyground-penetrating radarice riseice shelves |
| spellingShingle | Inka Koch Reinhard Drews Steven Franke Daniela Jansen Falk Marius Oraschewski Leah Sophie Muhle Vjeran Višnjević Kenichi Matsuoka Frank Pattyn Olaf Eisen Radar internal reflection horizons from multisystem data reflect ice dynamic and surface accumulation history along the Princess Ragnhild Coast, Dronning Maud Land, East Antarctica Journal of Glaciology airborne electromagnetic soundings Antarctic glaciology ground-penetrating radar ice rise ice shelves |
| 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_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_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_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 |
| topic | airborne electromagnetic soundings Antarctic glaciology ground-penetrating radar ice rise ice shelves |
| url | https://www.cambridge.org/core/product/identifier/S002214302300093X/type/journal_article |
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