Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data
Ice-penetrating radar profiles across the grounding line of a small ice-rise promontory located within the Roi Baudouin Ice Shelf in the Dronning Maud Land sector of East Antarctica show downward dipping englacial radar-detected reflectors. Model results indicate that this reflector pattern is best...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/171780 2023-05-15T13:37:29+02:00 Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data Pattyn, Frank Matsuoka, Kenichi Callens, Denis Conway, Howard Depoorter, Mathieu Docquier, David Hubbard, Bryn Samyn, Denis Tison, Jean-Louis 2012 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171780 en eng uri/info:doi/10.1029/2011JF002154 uri/info:scp/84867651917 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171780 Journal of geophysical research, 117 (4 Sciences exactes et naturelles info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2012 ftunivbruxelles 2022-06-12T22:09:17Z Ice-penetrating radar profiles across the grounding line of a small ice-rise promontory located within the Roi Baudouin Ice Shelf in the Dronning Maud Land sector of East Antarctica show downward dipping englacial radar-detected reflectors. Model results indicate that this reflector pattern is best fit by including basal melting of at least 15cm a -1. This rate of melting is low compared with rates observed on larger ice shelves in both West and East Antarctica. Ice cores extracted from a rift system close to the ice-rise promontory show several meters of marine ice accreted beneath the shelf. These observations of low rates of basal melting, and limited distribution of accreted marine ice suggest that either Antarctic surface water may reach the ice shelf base or that circulation beneath the shelf is likely dominated by the production of high salinity shelf water rather than the incursion of circumpolar deep water, implying a weak sub-shelf circulation system here. Many of the ice shelves located along the coast of Dronning Maud Land are, like Roi Baudouin Ice Shelf, characterized by frequent ice rises and promontories. Therefore, it is highly likely that these are also of shallow bathymetry and are subject to similarly weak side-shelf basal melting and refreezing. © 2012. American Geophysical Union. All Rights Reserved. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core Ice Shelf Ice Shelves DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic Dronning Maud Land East Antarctica Roi Baudouin ENVELOPE(24.461,24.461,-70.438,-70.438) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences exactes et naturelles |
spellingShingle |
Sciences exactes et naturelles Pattyn, Frank Matsuoka, Kenichi Callens, Denis Conway, Howard Depoorter, Mathieu Docquier, David Hubbard, Bryn Samyn, Denis Tison, Jean-Louis Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
topic_facet |
Sciences exactes et naturelles |
description |
Ice-penetrating radar profiles across the grounding line of a small ice-rise promontory located within the Roi Baudouin Ice Shelf in the Dronning Maud Land sector of East Antarctica show downward dipping englacial radar-detected reflectors. Model results indicate that this reflector pattern is best fit by including basal melting of at least 15cm a -1. This rate of melting is low compared with rates observed on larger ice shelves in both West and East Antarctica. Ice cores extracted from a rift system close to the ice-rise promontory show several meters of marine ice accreted beneath the shelf. These observations of low rates of basal melting, and limited distribution of accreted marine ice suggest that either Antarctic surface water may reach the ice shelf base or that circulation beneath the shelf is likely dominated by the production of high salinity shelf water rather than the incursion of circumpolar deep water, implying a weak sub-shelf circulation system here. Many of the ice shelves located along the coast of Dronning Maud Land are, like Roi Baudouin Ice Shelf, characterized by frequent ice rises and promontories. Therefore, it is highly likely that these are also of shallow bathymetry and are subject to similarly weak side-shelf basal melting and refreezing. © 2012. American Geophysical Union. All Rights Reserved. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Pattyn, Frank Matsuoka, Kenichi Callens, Denis Conway, Howard Depoorter, Mathieu Docquier, David Hubbard, Bryn Samyn, Denis Tison, Jean-Louis |
author_facet |
Pattyn, Frank Matsuoka, Kenichi Callens, Denis Conway, Howard Depoorter, Mathieu Docquier, David Hubbard, Bryn Samyn, Denis Tison, Jean-Louis |
author_sort |
Pattyn, Frank |
title |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_short |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_full |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_fullStr |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_full_unstemmed |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_sort |
melting and refreezing beneath roi baudouin ice shelf (east antarctica) inferred from radar, gps, and ice core data |
publishDate |
2012 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171780 |
long_lat |
ENVELOPE(24.461,24.461,-70.438,-70.438) |
geographic |
Antarctic Dronning Maud Land East Antarctica Roi Baudouin |
geographic_facet |
Antarctic Dronning Maud Land East Antarctica Roi Baudouin |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core Ice Shelf Ice Shelves |
op_source |
Journal of geophysical research, 117 (4 |
op_relation |
uri/info:doi/10.1029/2011JF002154 uri/info:scp/84867651917 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171780 |
_version_ |
1766092523624726528 |