Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet
he englacial stratigraphic architecture of internal reflection horizons (IRHs) as imaged by ice‐penetrating radar (IPR) across ice sheets reflects the cumulative effects of surface mass balance, basal melt, and ice flow. IRHs, considered isochrones, have typically been traced in interior, slow‐flowing r...
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Language: | English |
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American Geophysical Union
2020
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ftnerc:oai:nora.nerc.ac.uk:527218 2023-05-15T13:41:45+02:00 Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet Ashmore, David W. Bingham, Robert G. Ross, Neil Siegert, Martin J. Jordan, Tom Mair, Douglas W.F. 2020-03-28 text http://nora.nerc.ac.uk/id/eprint/527218/ https://nora.nerc.ac.uk/id/eprint/527218/1/Ashmore_et_al-2020-Geophysical_Research_Letters.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL086663 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/527218/1/Ashmore_et_al-2020-Geophysical_Research_Letters.pdf Ashmore, David W.; Bingham, Robert G.; Ross, Neil; Siegert, Martin J.; Jordan, Tom orcid:0000-0003-2780-1986 Mair, Douglas W.F. 2020 Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet. Geophysical Research Letters, 47 (6), e2019GL086663. https://doi.org/10.1029/2019GL086663 <https://doi.org/10.1029/2019GL086663> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.1029/2019GL086663 2023-02-04T19:50:24Z he englacial stratigraphic architecture of internal reflection horizons (IRHs) as imaged by ice‐penetrating radar (IPR) across ice sheets reflects the cumulative effects of surface mass balance, basal melt, and ice flow. IRHs, considered isochrones, have typically been traced in interior, slow‐flowing regions. Here, we identify three distinctive IRHs spanning the Institute and Möller catchments that cover 50% of West Antarctica's Weddell Sea Sector and are characterized by a complex system of ice stream tributaries. We place age constraints on IRHs through their intersections with previous geophysical surveys tied to Byrd Ice Core and by age‐depth modeling. We further show where the oldest ice likely exists within the region and that Holocene ice‐dynamic changes were limited to the catchment's lower reaches. The traced IRHs from this study have clear potential to nucleate a wider continental‐scale IRH database for validating ice sheet models. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Weddell Sea West Antarctic Ice Sheet Weddell Byrd Geophysical Research Letters 47 6 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
he englacial stratigraphic architecture of internal reflection horizons (IRHs) as imaged by ice‐penetrating radar (IPR) across ice sheets reflects the cumulative effects of surface mass balance, basal melt, and ice flow. IRHs, considered isochrones, have typically been traced in interior, slow‐flowing regions. Here, we identify three distinctive IRHs spanning the Institute and Möller catchments that cover 50% of West Antarctica's Weddell Sea Sector and are characterized by a complex system of ice stream tributaries. We place age constraints on IRHs through their intersections with previous geophysical surveys tied to Byrd Ice Core and by age‐depth modeling. We further show where the oldest ice likely exists within the region and that Holocene ice‐dynamic changes were limited to the catchment's lower reaches. The traced IRHs from this study have clear potential to nucleate a wider continental‐scale IRH database for validating ice sheet models. |
format |
Article in Journal/Newspaper |
author |
Ashmore, David W. Bingham, Robert G. Ross, Neil Siegert, Martin J. Jordan, Tom Mair, Douglas W.F. |
spellingShingle |
Ashmore, David W. Bingham, Robert G. Ross, Neil Siegert, Martin J. Jordan, Tom Mair, Douglas W.F. Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet |
author_facet |
Ashmore, David W. Bingham, Robert G. Ross, Neil Siegert, Martin J. Jordan, Tom Mair, Douglas W.F. |
author_sort |
Ashmore, David W. |
title |
Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet |
title_short |
Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet |
title_full |
Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet |
title_fullStr |
Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet |
title_full_unstemmed |
Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet |
title_sort |
englacial architecture and age‐depth constraints across the west antarctic ice sheet |
publisher |
American Geophysical Union |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/527218/ https://nora.nerc.ac.uk/id/eprint/527218/1/Ashmore_et_al-2020-Geophysical_Research_Letters.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL086663 |
geographic |
Antarctic Weddell Sea West Antarctic Ice Sheet Weddell Byrd |
geographic_facet |
Antarctic Weddell Sea West Antarctic Ice Sheet Weddell Byrd |
genre |
Antarc* Antarctic ice core Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic ice core Ice Sheet Weddell Sea |
op_relation |
https://nora.nerc.ac.uk/id/eprint/527218/1/Ashmore_et_al-2020-Geophysical_Research_Letters.pdf Ashmore, David W.; Bingham, Robert G.; Ross, Neil; Siegert, Martin J.; Jordan, Tom orcid:0000-0003-2780-1986 Mair, Douglas W.F. 2020 Englacial architecture and age‐depth constraints across the West Antarctic Ice Sheet. Geophysical Research Letters, 47 (6), e2019GL086663. https://doi.org/10.1029/2019GL086663 <https://doi.org/10.1029/2019GL086663> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019GL086663 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
6 |
_version_ |
1766156764161507328 |