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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ftawi:oai:epic.awi.de:2295 2023-09-05T13:15:02+02:00 Evidence for basal marine ice in the Filchner-Ronne ice shelf Oerter, Hans Kipfstuhl, J. Determann, Jürgen Miller, Heinrich Wagenbach, D. Minikin, A. Graf, W. 1992 application/pdf https://epic.awi.de/id/eprint/2295/ https://epic.awi.de/id/eprint/2295/1/Oer1992a.pdf https://hdl.handle.net/10013/epic.12883 https://hdl.handle.net/10013/epic.12883.d001 unknown https://epic.awi.de/id/eprint/2295/1/Oer1992a.pdf https://hdl.handle.net/10013/epic.12883.d001 Oerter, H. , Kipfstuhl, J. , Determann, J. , Miller, H. , Wagenbach, D. , Minikin, A. and Graf, W. (1992) Evidence for basal marine ice in the Filchner-Ronne ice shelf , Nature, 358 , pp. 399-401 . hdl:10013/epic.12883 EPIC3Nature, 358, pp. 399-401 Article isiRev 1992 ftawi 2023-08-22T19:43:12Z 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 interpret(1,2). Ice in the upper part of the shelf is of meteoric origin, but it has been proposed(2-5) 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) West Antarctic Ice Sheet |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 interpret(1,2). Ice in the upper part of the shelf is of meteoric origin, but it has been proposed(2-5) 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, Hans Kipfstuhl, J. Determann, Jürgen Miller, Heinrich Wagenbach, D. Minikin, A. Graf, W. |
spellingShingle |
Oerter, Hans Kipfstuhl, J. Determann, Jürgen Miller, Heinrich Wagenbach, D. Minikin, A. Graf, W. Evidence for basal marine ice in the Filchner-Ronne ice shelf |
author_facet |
Oerter, Hans Kipfstuhl, J. Determann, Jürgen Miller, Heinrich Wagenbach, D. Minikin, A. Graf, W. |
author_sort |
Oerter, Hans |
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://epic.awi.de/id/eprint/2295/ https://epic.awi.de/id/eprint/2295/1/Oer1992a.pdf https://hdl.handle.net/10013/epic.12883 https://hdl.handle.net/10013/epic.12883.d001 |
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 |
EPIC3Nature, 358, pp. 399-401 |
op_relation |
https://epic.awi.de/id/eprint/2295/1/Oer1992a.pdf https://hdl.handle.net/10013/epic.12883.d001 Oerter, H. , Kipfstuhl, J. , Determann, J. , Miller, H. , Wagenbach, D. , Minikin, A. and Graf, W. (1992) Evidence for basal marine ice in the Filchner-Ronne ice shelf , Nature, 358 , pp. 399-401 . hdl:10013/epic.12883 |
_version_ |
1776196887498457088 |