Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica
Simulations of the ocean dynamics in the cavity under the Amery Ice Shelf, Antarctica, were carried out using a three-dimensional numerical ocean model. Two different boundary conditions were used to describe the open ocean barotropic exchange at the ice front. The simulations show that the circulat...
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Online Access: | https://doi.org/10.1029/2000JC000236 http://ecite.utas.edu.au/22368 |
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ftunivtasecite:oai:ecite.utas.edu.au:22368 2023-05-15T13:21:59+02:00 Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica Williams, MJM Grosfeld, K Warner, RC Gerdes, R Determann, J 2001 https://doi.org/10.1029/2000JC000236 http://ecite.utas.edu.au/22368 en eng American Geophysical Union http://dx.doi.org/10.1029/2000JC000236 Williams, MJM and Grosfeld, K and Warner, RC and Gerdes, R and Determann, J, Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica, Journal of Geophysical Research, 106, (C10) pp. 22383-22399. ISSN 0148-0227 (2001) [Refereed Article] http://ecite.utas.edu.au/22368 Earth Sciences Oceanography Physical Oceanography Refereed Article PeerReviewed 2001 ftunivtasecite https://doi.org/10.1029/2000JC000236 2019-12-13T21:04:19Z Simulations of the ocean dynamics in the cavity under the Amery Ice Shelf, Antarctica, were carried out using a three-dimensional numerical ocean model. Two different boundary conditions were used to describe the open ocean barotropic exchange at the ice front. The simulations show that the circulation in the ocean cavity is predominantly barotropic and is generally steered by the cavity topography. The circulation is driven by the density gradient in the cavity, which is strongly influenced by the heat and salt fluxes from melting and freezing processes at the ice-ocean interface, and by the horizontal exchange of heat and salt across the open ocean boundary at the ice front. The interaction at the ice-ocean interface allows the basal component of the mass loss of the Amery Ice Shelf to be estimated. In the two simulations the computed losses were 5.8 Gt yr-1 and 18.0 Gt yr-1, values consistent with observations. The bulk of the melting occurred near the southern grounding line of the ice shelf, although substantial melting also occurred in areas where heat transport by horizontal circulation was large. Accretion was restricted to areas where water, from upstream melting, became supercooled as it ascended the ice shelf base. Copyright 2001 by the American Geophysical Union. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctica Antarctica Journal Ice Shelf eCite UTAS (University of Tasmania) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) Journal of Geophysical Research: Oceans 106 C10 22383 22399 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical Oceanography |
spellingShingle |
Earth Sciences Oceanography Physical Oceanography Williams, MJM Grosfeld, K Warner, RC Gerdes, R Determann, J Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica |
topic_facet |
Earth Sciences Oceanography Physical Oceanography |
description |
Simulations of the ocean dynamics in the cavity under the Amery Ice Shelf, Antarctica, were carried out using a three-dimensional numerical ocean model. Two different boundary conditions were used to describe the open ocean barotropic exchange at the ice front. The simulations show that the circulation in the ocean cavity is predominantly barotropic and is generally steered by the cavity topography. The circulation is driven by the density gradient in the cavity, which is strongly influenced by the heat and salt fluxes from melting and freezing processes at the ice-ocean interface, and by the horizontal exchange of heat and salt across the open ocean boundary at the ice front. The interaction at the ice-ocean interface allows the basal component of the mass loss of the Amery Ice Shelf to be estimated. In the two simulations the computed losses were 5.8 Gt yr-1 and 18.0 Gt yr-1, values consistent with observations. The bulk of the melting occurred near the southern grounding line of the ice shelf, although substantial melting also occurred in areas where heat transport by horizontal circulation was large. Accretion was restricted to areas where water, from upstream melting, became supercooled as it ascended the ice shelf base. Copyright 2001 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Williams, MJM Grosfeld, K Warner, RC Gerdes, R Determann, J |
author_facet |
Williams, MJM Grosfeld, K Warner, RC Gerdes, R Determann, J |
author_sort |
Williams, MJM |
title |
Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica |
title_short |
Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica |
title_full |
Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica |
title_fullStr |
Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica |
title_full_unstemmed |
Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica |
title_sort |
ocean circulation and ice-ocean interaction beneath the amery ice shelf, antarctica |
publisher |
American Geophysical Union |
publishDate |
2001 |
url |
https://doi.org/10.1029/2000JC000236 http://ecite.utas.edu.au/22368 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) |
geographic |
Amery Amery Ice Shelf |
geographic_facet |
Amery Amery Ice Shelf |
genre |
Amery Ice Shelf Antarc* Antarctica Antarctica Journal Ice Shelf |
genre_facet |
Amery Ice Shelf Antarc* Antarctica Antarctica Journal Ice Shelf |
op_relation |
http://dx.doi.org/10.1029/2000JC000236 Williams, MJM and Grosfeld, K and Warner, RC and Gerdes, R and Determann, J, Ocean circulation and ice-ocean interaction beneath the Amery Ice Shelf, Antarctica, Journal of Geophysical Research, 106, (C10) pp. 22383-22399. ISSN 0148-0227 (2001) [Refereed Article] http://ecite.utas.edu.au/22368 |
op_doi |
https://doi.org/10.1029/2000JC000236 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
106 |
container_issue |
C10 |
container_start_page |
22383 |
op_container_end_page |
22399 |
_version_ |
1766362631019429888 |