Radar‐detected englacial debris in the West Antarctic Ice Sheet
Structural glaci‐geological processes can entrain basal sediment into ice, leading to its transportation and deposition downstream. Sediments potentially rich in essential nutrients, like silica and iron, can thus be transferred from continental sources to the ocean, where deposition could enhance m...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2019
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/40483/ https://doi.org/10.1029/2019gl084012 https://nrl.northumbria.ac.uk/id/eprint/40483/19/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/9/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/1/2019GL084012.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:40483 2023-05-15T13:41:26+02:00 Radar‐detected englacial debris in the West Antarctic Ice Sheet Winter, Kate Woodward, John Ross, Neil Dunning, Stuart A. Hein, Andrew S. Westoby, Matt Culberg, Riley Marrero, Shasta M. Schroeder, Dustin M. Sugden, David E. Siegert, Martin J. 2019-09-10 text https://nrl.northumbria.ac.uk/id/eprint/40483/ https://doi.org/10.1029/2019gl084012 https://nrl.northumbria.ac.uk/id/eprint/40483/19/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/9/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/1/2019GL084012.pdf en eng American Geophysical Union https://nrl.northumbria.ac.uk/id/eprint/40483/19/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/9/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/1/2019GL084012.pdf Winter, Kate, Woodward, John, Ross, Neil, Dunning, Stuart A., Hein, Andrew S., Westoby, Matt, Culberg, Riley, Marrero, Shasta M., Schroeder, Dustin M., Sugden, David E. and Siegert, Martin J. (2019) Radar‐detected englacial debris in the West Antarctic Ice Sheet. Geophysical Research Letters, 46 (17-18). pp. 10454-10462. ISSN 0094-8276 cc_by_4_0 CC-BY F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2019 ftunivnorthumb https://doi.org/10.1029/2019gl084012 2022-09-25T06:10:33Z Structural glaci‐geological processes can entrain basal sediment into ice, leading to its transportation and deposition downstream. Sediments potentially rich in essential nutrients, like silica and iron, can thus be transferred from continental sources to the ocean, where deposition could enhance marine primary productivity. However, a lack of data has limited our knowledge of sediment entrainment, transfer and distribution in Antarctica, until now. We use ice‐penetrating radar to examine englacial sediments in the Weddell Sea sector of the West Antarctic Ice Sheet. Radargrams reveal englacial reflectors on the lee side of nunataks and subglacial highlands, where Mie scattering analysis of the reflectors suggests particle sizes consistent with surface moraine sediments. We hypothesize that these sediments aare entrained at the thermal boundary between cold and warm‐based ice. Conservative estimates of >130 x109 kg of englacial sediment in Horseshoe Valley alone suggest that the ice sheet has significant entrainment potential unappreciated previously. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Weddell Sea Northumbria University, Newcastle: Northumbria Research Link (NRL) Antarctic Horseshoe Valley ENVELOPE(-82.000,-82.000,-80.083,-80.083) Weddell Weddell Sea West Antarctic Ice Sheet Geophysical Research Letters 46 17-18 10454 10462 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences Winter, Kate Woodward, John Ross, Neil Dunning, Stuart A. Hein, Andrew S. Westoby, Matt Culberg, Riley Marrero, Shasta M. Schroeder, Dustin M. Sugden, David E. Siegert, Martin J. Radar‐detected englacial debris in the West Antarctic Ice Sheet |
topic_facet |
F600 Geology F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Structural glaci‐geological processes can entrain basal sediment into ice, leading to its transportation and deposition downstream. Sediments potentially rich in essential nutrients, like silica and iron, can thus be transferred from continental sources to the ocean, where deposition could enhance marine primary productivity. However, a lack of data has limited our knowledge of sediment entrainment, transfer and distribution in Antarctica, until now. We use ice‐penetrating radar to examine englacial sediments in the Weddell Sea sector of the West Antarctic Ice Sheet. Radargrams reveal englacial reflectors on the lee side of nunataks and subglacial highlands, where Mie scattering analysis of the reflectors suggests particle sizes consistent with surface moraine sediments. We hypothesize that these sediments aare entrained at the thermal boundary between cold and warm‐based ice. Conservative estimates of >130 x109 kg of englacial sediment in Horseshoe Valley alone suggest that the ice sheet has significant entrainment potential unappreciated previously. |
format |
Article in Journal/Newspaper |
author |
Winter, Kate Woodward, John Ross, Neil Dunning, Stuart A. Hein, Andrew S. Westoby, Matt Culberg, Riley Marrero, Shasta M. Schroeder, Dustin M. Sugden, David E. Siegert, Martin J. |
author_facet |
Winter, Kate Woodward, John Ross, Neil Dunning, Stuart A. Hein, Andrew S. Westoby, Matt Culberg, Riley Marrero, Shasta M. Schroeder, Dustin M. Sugden, David E. Siegert, Martin J. |
author_sort |
Winter, Kate |
title |
Radar‐detected englacial debris in the West Antarctic Ice Sheet |
title_short |
Radar‐detected englacial debris in the West Antarctic Ice Sheet |
title_full |
Radar‐detected englacial debris in the West Antarctic Ice Sheet |
title_fullStr |
Radar‐detected englacial debris in the West Antarctic Ice Sheet |
title_full_unstemmed |
Radar‐detected englacial debris in the West Antarctic Ice Sheet |
title_sort |
radar‐detected englacial debris in the west antarctic ice sheet |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://nrl.northumbria.ac.uk/id/eprint/40483/ https://doi.org/10.1029/2019gl084012 https://nrl.northumbria.ac.uk/id/eprint/40483/19/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/9/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/1/2019GL084012.pdf |
long_lat |
ENVELOPE(-82.000,-82.000,-80.083,-80.083) |
geographic |
Antarctic Horseshoe Valley Weddell Weddell Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Horseshoe Valley Weddell Weddell Sea West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Weddell Sea |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/40483/19/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/9/Winter_et_al-2019-Geophysical_Research_Letters.pdf https://nrl.northumbria.ac.uk/id/eprint/40483/1/2019GL084012.pdf Winter, Kate, Woodward, John, Ross, Neil, Dunning, Stuart A., Hein, Andrew S., Westoby, Matt, Culberg, Riley, Marrero, Shasta M., Schroeder, Dustin M., Sugden, David E. and Siegert, Martin J. (2019) Radar‐detected englacial debris in the West Antarctic Ice Sheet. Geophysical Research Letters, 46 (17-18). pp. 10454-10462. ISSN 0094-8276 |
op_rights |
cc_by_4_0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019gl084012 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
17-18 |
container_start_page |
10454 |
op_container_end_page |
10462 |
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1766150804275724288 |