Evidence for basal marine ice in the Filchner-Ronne ice shelf.
THE Filchner-Ronne ice shelf, which drains most of the marine-based portions of the West Antarctic ice sheet, is the largest ice shelf on Earth by volume. The origin and properties of the ice that constitutes this shelf are poorly understood, because a strong reflecting interface within the ice and...
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fthzmuenchen:oai:opus-zb.helmholtz-muenchen.de:40526 2023-05-15T13:56:27+02:00 Evidence for basal marine ice in the Filchner-Ronne ice shelf. Oerter, H. Kipfstuhl, J. Determann, J. Miller, H.W. Wagenbach, D. Minikin, A. Graft, W. 1992-01-01 https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=40526 https://doi.org/10.1038/358399a0 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1038/358399a0 info:eu-repo/semantics/altIdentifier/wos/undefined info:eu-repo/semantics/altIdentifier/isbn/0028-0836 info:eu-repo/semantics/altIdentifier/pissn/0028-0836 info:eu-repo/semantics/altIdentifier/eis https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=40526 doi:10.1038/358399a0 urn:isbn:0028-0836 urn:issn:0028-0836 urn:issn:1476-4687 info:eu-repo/semantics/closedAccess Nature 358, 399-401 (1992) Text info:eu-repo/semantics/article 1992 fthzmuenchen https://doi.org/10.1038/358399a0 2022-11-20T09:01:35Z THE Filchner-Ronne ice shelf, which drains most of the marine-based portions of the West Antarctic ice sheet, is the largest ice shelf on Earth by volume. The origin and properties of the ice that constitutes this shelf are poorly understood, because a strong reflecting interface within the ice and the diffuse nature of the ice-ocean interface make seismic and radio echo sounding data difficult to interpret1,2. Ice in the upper part of the shelf is of meteoric origin, but it has been proposed2,5 that a basal layer of saline ice accumulates from below. Here we present the results of an analysis of the physical and chemical characteristics of an ice core drilled almost to the bottom of the Ronne ice shelf. We observe a change in ice properties at about 150 m depth, which we ascribe to a change from meteoric ice to basal marine ice. The basal ice is very different from sea ice formed at the ocean surface and we propose a formation mechanism in which ice platelets in the water column accrete to the bottom of the ice shelf. Article in Journal/Newspaper Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf ice core Ice Sheet Ice Shelf Ronne Ice Shelf Sea ice PuSH - Publikationsserver des Helmholtz Zentrums München Antarctic Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) West Antarctic Ice Sheet Nature 358 6385 399 401 |
institution |
Open Polar |
collection |
PuSH - Publikationsserver des Helmholtz Zentrums München |
op_collection_id |
fthzmuenchen |
language |
English |
description |
THE Filchner-Ronne ice shelf, which drains most of the marine-based portions of the West Antarctic ice sheet, is the largest ice shelf on Earth by volume. The origin and properties of the ice that constitutes this shelf are poorly understood, because a strong reflecting interface within the ice and the diffuse nature of the ice-ocean interface make seismic and radio echo sounding data difficult to interpret1,2. Ice in the upper part of the shelf is of meteoric origin, but it has been proposed2,5 that a basal layer of saline ice accumulates from below. Here we present the results of an analysis of the physical and chemical characteristics of an ice core drilled almost to the bottom of the Ronne ice shelf. We observe a change in ice properties at about 150 m depth, which we ascribe to a change from meteoric ice to basal marine ice. The basal ice is very different from sea ice formed at the ocean surface and we propose a formation mechanism in which ice platelets in the water column accrete to the bottom of the ice shelf. |
format |
Article in Journal/Newspaper |
author |
Oerter, H. Kipfstuhl, J. Determann, J. Miller, H.W. Wagenbach, D. Minikin, A. Graft, W. |
spellingShingle |
Oerter, H. Kipfstuhl, J. Determann, J. Miller, H.W. Wagenbach, D. Minikin, A. Graft, W. Evidence for basal marine ice in the Filchner-Ronne ice shelf. |
author_facet |
Oerter, H. Kipfstuhl, J. Determann, J. Miller, H.W. Wagenbach, D. Minikin, A. Graft, W. |
author_sort |
Oerter, H. |
title |
Evidence for basal marine ice in the Filchner-Ronne ice shelf. |
title_short |
Evidence for basal marine ice in the Filchner-Ronne ice shelf. |
title_full |
Evidence for basal marine ice in the Filchner-Ronne ice shelf. |
title_fullStr |
Evidence for basal marine ice in the Filchner-Ronne ice shelf. |
title_full_unstemmed |
Evidence for basal marine ice in the Filchner-Ronne ice shelf. |
title_sort |
evidence for basal marine ice in the filchner-ronne ice shelf. |
publishDate |
1992 |
url |
https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=40526 https://doi.org/10.1038/358399a0 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Ronne Ice Shelf West Antarctic Ice Sheet |
geographic_facet |
Antarctic Ronne Ice Shelf West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf ice core Ice Sheet Ice Shelf Ronne Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf ice core Ice Sheet Ice Shelf Ronne Ice Shelf Sea ice |
op_source |
Nature 358, 399-401 (1992) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/358399a0 info:eu-repo/semantics/altIdentifier/wos/undefined info:eu-repo/semantics/altIdentifier/isbn/0028-0836 info:eu-repo/semantics/altIdentifier/pissn/0028-0836 info:eu-repo/semantics/altIdentifier/eis https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=40526 doi:10.1038/358399a0 urn:isbn:0028-0836 urn:issn:0028-0836 urn:issn:1476-4687 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1038/358399a0 |
container_title |
Nature |
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358 |
container_issue |
6385 |
container_start_page |
399 |
op_container_end_page |
401 |
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1766263968360300544 |